I am using Ubuntu 24.04.4. My Network Manager is not showing. I can not use internet even though the Ethernet cable is plugged in and the light comes on. My Bluetooth is not showing. and USB drives will not mount. I can still login to Ubuntu. LibreOffice and installed programs work. All of these were working.

Before when I try to install Network Manager: post htttps://api snapcraft.io/v2/snaps/refresh: dial tcp: lookup api.snapcraft on 127.0.0.53:53: server is misbehaving. When I try to install Network Manager with sudo apt install network-manager it says unable to fetch some archives maybe run apt -get update or try with –fix mising. When I run sudo apt get update it says temporary failure resolving us.archive.ubuntu.com. When I attempt to pull up Bluetooth it says no bluetooth found plug in dongle to use Bluetooth. When I plug in a USB drive to my USB drive Ubuntu pulls up a USB icon and says failed to mount usb disk error mounting dev/sda1 at media/ai/USB DISK: file system type exfat not configured in kernel. What do I need to do to resolve this?

dev.mysql.com/downloads/workbench only offers versions for LTS versions 24.04 and 22.04. I tried installing the 24.04 version in Ubuntu 26.04, but it failed with dependency problems.

I have an HP ZBook 15 G6, with a WWAN module included (Fibocom L850-GL). This WWAN with the SIM card is working under Windows 11 (had to start Windows to test it), but partially working under Ubuntu 26.04. The WWAN module is recognized by Ubuntu, and I can access it in the system parameters. But, I cannot define user data (apn, allowed-auth, user, password). There is an existing profile ("Datapro") that cannot be updated (I can fill in data, but it's not saved when I click on save !). I tried with mmcli, and I can create a bearer, but I don't know how to specify to connect the WWAN using this bearer...

Ideally, do you know how I could replace this "Datapro" profile to include my data ?

I am just going to throw this one out there to see if anyone might have an idea as to what is happening. When I setup this XUbuntu 26.04 I gave it kind of a temporary hostname since I was dual booting with XUbuntu 24.04. Well, I have since removed 24.04 and I want to change my hostname back to what I use on my system.

Every time I go to change the hostname to terrance-ubuntu, sudo hostnamectl set-hostname terrance-ubuntu and I change the /etc/hosts file to match, as soon as I reboot my system the wired r8125 2.5Gbps NIC driver goes UNCLAIMED for some reason and if I connect via Wi-Fi it is extremely unstable. Any ideas?

terrance@terrance-XU2604:~$ cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=26.04
DISTRIB_CODENAME=resolute
DISTRIB_DESCRIPTION="Ubuntu 26.04 LTS"
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
VERSION_ID="26.04"
VERSION="26.04 LTS (Resolute Raccoon)"
VERSION_CODENAME=resolute
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=resolute
LOGO=ubuntu-logo

terrance@terrance-XU2604:~$ uname -a
Linux terrance-XU2604 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux

terrance@terrance-XU2604:~$ dkms status
nct6687d/20260313-180048, 7.0.0-14-generic, x86_64: installed
nct6687d/20260313-180048, 7.0.0-15-generic, x86_64: installed
r8125/9.016.01, 7.0.0-14-generic, x86_64: installed
r8125/9.016.01, 7.0.0-15-generic, x86_64: installed

terrance@terrance-XU2604:~$ sudo lshw -C network
[sudo: authenticate] Password:           
  *-network                 
       description: Wireless interface
       product: MT7922 802.11ax PCI Express Wireless Network Adapter
       vendor: MEDIATEK Corp.
       physical id: 0
       bus info: pci@0000:29:00.0
       logical name: wlan0
       version: 00
       serial: 04:68:74:9e:f2:b3
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=mt7921e driverversion=7.0.0-15-generic firmware=____000000-20260224103233 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: iomemory:7f0-7ef irq:121 memory:7ff2100000-7ff21fffff memory:fc300000-fc307fff
  *-network
       description: Ethernet interface
       product: RTL8125 2.5GbE Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:2a:00.0
       logical name: eth0
       version: 05
       serial: 0a:9c:62:49:33:4f
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8125 driverversion=9.016.01-NAPI duplex=full ip=10.0.0.100 latency=0 link=yes multicast=yes port=twisted pair
       resources: irq:38 ioport:f000(size=256) memory:fc200000-fc20ffff memory:fc210000-fc213fff

I have an NVIDIA GeForce RTX 2070 SUPER, and until around October/November last year it had never caused me any problems on any Ubuntu release since 22.04. For quite a while everything worked fine, with no freezes or system lockups, however, with Ubuntu 25.04 I started having GPU compatibility issues, so I went back to Ubuntu 24.04. Since then and especially since late 2025, I've been experiencing intermittent full system freezes.

The issue does not seem to be tied to any specific application: it can happen with any program. It usually happens after a few hours of normal use, but it has also happened after several hours of idling with LibreOffice and/or Firefox open.

So far, NVIDIA driver 535 seems to have improved things somewhat, but it has not completely solved the problem.

My main question is whether this points to a known compatibility problem between my GPU, the NVIDIA drivers, and recent Ubuntu releases, and especially whether Ubuntu 26.04 could cause similar stability problems with this card.

I’d like to know:

• whether anyone with an RTX 2070 SUPER has seen similar behavior on recent Ubuntu releases.

• whether the 535 driver series has known issues with certain kernels or Ubuntu versions.

• whether Ubuntu 26.04 is likely to improve or worsen this kind of issue.

• what additional information would be most useful to diagnose it properly.

I can provide more technical details if needed, such as: exact kernel version, nvidia-smi output, dmesg, journalctl, or any other logs that may help identify the cause.

Every time I launch software-properties-qt on Kubuntu 26.04, it immediately crashes. Today when I tried opening software-properties-qt, it didn't work and I got syntax errors.

andygl@hp15s:~$ sudo GDK_BACKEND=wayland software-properties-qt
Traceback (most recent call last):
  File "/usr/bin/software-properties-qt", line 130, in <module>
    app = SoftwarePropertiesQt(datadir=data_dir, options=options, file=afile, attachWinID=attachWinID)
  File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 164, in __init__
    self.show_distro()
    ~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 376, in show_distro
    child.setCheckState(Qt.PartiallyChecked)
                        ^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'Qt' has no attribute 'PartiallyChecked'

I have to note that even after trying running it with Wayland or x11 back-end it didn't help.

When I use pkexec instead same issue as many many other bug reports in the past

andygl@hp15s:~$ pkexec software-properties-qt
qt.qpa.xcb: could not connect to display 
qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, minimalegl, wayland-brcm, wayland-egl, wayland, vnc, minimal, linuxfb, vkkhrdisplay, xcb, offscreen.

Aborted                    (core dumped) pkexec software-properties-qt
andygl@hp15s:~$ 

I also filed a bug report See here

I have the standard version of Ubuntu installed (version 24.04), but I tried the Ubuntu Studio ISO and I liked it, so I'd like to install the theme. I don't need the audio and video editing software plus I don't want to reinstall my apps, so how do I install only the theme without installing all the apps that I don't need. There was an icon near the clock that I couldn't get rid of.

Lately kde discover has been verry laggy particularly when clicking the installed apps tab or when clicking an app from the home section too early. Also It failes to show screenshots for apps comming from the ubuntu source. I tried debugging it and this is what i got

looking up wrong category or too early "Development"  
org.kde.plasma.libdiscover: CategoriesReader: Load categories from file "/usr/share/libdiscover/categories/flatpak-backend-categories.xml" with l10n true  
org.kde.plasma.libdiscover: CategoriesReader: Couldn't find a category for "fwupd-backend"  
org.kde.plasma.libdiscover: CategoriesReader: Load categories from file "/usr/share/libdiscover/categories/packagekit-backend-categories.xml" with l10n true  
org.kde.plasma.libdiscover: CategoriesReader: Couldn't find a category for "snap-backend"  
qt.qpa.services: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: Connection already associated with an application ID")  
PackageKitBackend: No distro component found for "com.ubuntu.ubuntu"  
fwupd: Device not supported: UEFI dbx No releases found  
AppStreamIntegration: No distro component found for "com.ubuntu.ubuntu"  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:19:1: QML ApplicationPage: Created graphical object was not placed in the graphics scene.  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:116:5: QML ReviewsPage: Binding loop detected for property "implicitHeight":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:139:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:116:5: QML ReviewsPage: Binding loop detected for property "y":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:117:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:116:5: QML ReviewsPage: Binding loop detected for property "implicitHeight":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:139:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:923:5: QML AddonsView: Binding loop detected for property "implicitHeight":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:139:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:923:5: QML AddonsView: Binding loop detected for property "y":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:117:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:116:5: QML ReviewsPage: Binding loop detected for property "y":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:117:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:116:5: QML ReviewsPage: Binding loop detected for property "implicitHeight":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:139:5  
qrc:/qt/qml/org/kde/discover/qml/ApplicationPage.qml:923:5: QML AddonsView: Binding loop detected for property "implicitHeight":  
qrc:/qt/qml/org/kde/kirigami/templates/OverlaySheet.qml:139:5  
qrc:/qt/qml/org/kde/kirigami/controls/private/PrivateActionToolButton.qml:74:5: QML Binding: Binding loop detected for property "value":  
qrc:/qt/qml/org/kde/kirigami/controls/private/PrivateActionToolButton.qml:77:9  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:161:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:161:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:161:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:184:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:184:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
qrc:/qt/qml/org/kde/discover/qml/CarouselDelegate.qml:184:33: QML QQuickImage: SSL handshake failed: The certificate has expired  
org.kde.plasma.libdiscover: reviews arrived... 0 861

Here are the steps I tried taking to fix it:

sudo rm -rf /var/cache/appstream/*
  851  clear
  852  sudo apt update --fix-missing
  853  sudo appstreamcli refresh --force
  854  sudo pkill -f packagekitd
  855  sudo rm -rf /var/cache/PackageKit/*
  856  pkcon refresh force
  857  rm -rf ~/.cache/discover
  858  rm -rf ~/.cache/PackageKit
  859  sudo appstreamcli refresh --force
  860  sudo apt install packagekit packagekit-tools plasma-discover-backend-packageki
  861  sudo apt install packagekit packagekit-tools plasma-discover-backend-packagekit
  867 sudo apt update
  868  sudo apt install --reinstall appstream appstream-q

I have to note that it was always that slow on installed tab from possibly the day I upgraded but most of my attempts didnt work

I am visually impaired and rely on a fully dark user interface in order to work comfortably. I use RStudio for scripting and data analysis, and I am having a dark-mode accessibility problem on Ubuntu.

I have tested this on Ubuntu 20.04 LTS, 24.04 LTS, and 26.04 LTS. On Ubuntu 20.04, RStudio behaved more consistently for me, however from Ubuntu 24.04 LTS onward, RStudio is not fully dark even when both Ubuntu and RStudio are configured for dark mode.

What happens:

Ubuntu/GNOME is set to Dark Mode in the system settings.
RStudio is set to a dark editor theme.
Most of the RStudio interface becomes dark.
However the top title/menu bar, menu dropdowns, and right-click context menus remain bright/light.
This causes accessibility problems for me because I need the whole application interface to be dark, not only the editor area. (It hurts my eyes.)

I already discussed this at the Posit Community forum.

A Posit employee explained that on Linux/GNOME, RStudio’s title bar and menus seem to depend on the operating-system theme rather than only RStudio’s internal theme. They also mentioned that this may be related to a GNOME/Electron theme-handling issue.

On my system, the following command shows that GNOME prefers dark mode:

gsettings get org.gnome.desktop.interface color-scheme

It returns:

'prefer-dark'

I also tried setting the GTK theme manually:

gsettings set org.gnome.desktop.interface gtk-theme 'Yaru-dark'

...however RStudio still starts with a light title/menu bar when launched normally.

The only workaround I found is starting RStudio like this:

GTK_THEME=Yaru-dark rstudio

When I do that, the RStudio title/menu bar becomes dark.

My question is:

How can I make RStudio always use the dark GTK/Yaru theme on Ubuntu when launched normally from the desktop launcher, without having to start it manually from the terminal with GTK_THEME=Yaru-dark rstudio?

Is this likely caused by Ubuntu/GNOME theme settings, the RStudio desktop launcher, Electron, or something else? Interestingly, the Posit Employee set everything up like I did (Ubuntu 26.04 LTS, the same RStudio download link and version), but he was getting everything in dark.

I remember from Ubuntu 24.04 LTS that also other Apps were affected, but I don't have that Laptop anymore. The best would be a workaround and even better, to avoid using a workaround for certain apps, to normally install and use since these topics are not my expertise.

Any help would be appreciated, especially because this affects accessibility in my case.

I've recently upgraded my laptop from 25.10 to 26.04 and now observing issues with Wi-Fi:

The laptop will often disconnect and reconnect to the network. When it does, it have troubles streaming 720p video from the net.

I've also noticed other devices suffering in presence of my laptop. My phone will often reconnect and sometimes give up on the Wi-Fi network entirely. Windows laptop suffers video playback issues when Ubuntu laptop is connected, suffers from erratic ping and packet loss.

I have the following in dmesg of my Ubuntu laptop:

[270417.704795] wlp0s20f3: associate with 5c:62:8b:08:5a:d4 (try 1/3)
[270417.708301] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.708349] wlp0s20f3: RX AssocResp from 5c:62:8b:08:5a:d4 (capab=0x411 status=0 aid=2)
[270417.708381] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.711392] wlp0s20f3: associated
[270417.712995] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.713017] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.713223] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.713519] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.713527] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.715048] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.715063] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[270417.715653] iwlwifi 0000:00:14.3: Unhandled alg: 0x707
[271086.219014] wlp0s20f3: deauthenticated from 5c:62:8b:08:5a:d4 (Reason: 3=DEAUTH_LEAVING)
[271104.724678] wlp0s20f3: authenticate with 5c:62:8b:08:5a:d4 (local address=98:bd:80:af:12:b1)
[271104.725114] wlp0s20f3: send auth to 5c:62:8b:08:5a:d4 (try 1/3)
[271104.727827] wlp0s20f3: authenticated
[271104.728386] wlp0s20f3: associate with 5c:62:8b:08:5a:d4 (try 1/3)
[271104.735759] wlp0s20f3: RX AssocResp from 5c:62:8b:08:5a:d4 (capab=0x411 status=0 aid=2)
[271104.737563] wlp0s20f3: associated
[271559.229639] wlp0s20f3: deauthenticated from 5c:62:8b:08:5a:d4 (Reason: 3=DEAUTH_LEAVING)
[271564.790784] wlp0s20f3: authenticate with 5c:62:8b:08:5a:d4 (local address=98:bd:80:af:12:b1)
[271564.791193] wlp0s20f3: send auth to 5c:62:8b:08:5a:d4 (try 1/3)
[271564.794562] wlp0s20f3: authenticated
[271564.795527] wlp0s20f3: associate with 5c:62:8b:08:5a:d4 (try 1/3)
[271564.824805] wlp0s20f3: RX AssocResp from 5c:62:8b:08:5a:d4 (capab=0x411 status=0 aid=2)
[271564.827340] wlp0s20f3: associated 
[273434.433245] wlp0s20f3: Connection to AP 5c:62:8b:08:5a:d4 lost
[273452.590469] wlp0s20f3: authenticate with 5c:62:8b:08:5a:d4 (local address=98:bd:80:af:12:b1)
[273452.591027] wlp0s20f3: send auth to 5c:62:8b:08:5a:d4 (try 1/3)
[273452.593632] wlp0s20f3: authenticated
[273452.594447] wlp0s20f3: associate with 5c:62:8b:08:5a:d4 (try 1/3)
[273452.598060] wlp0s20f3: RX AssocResp from 5c:62:8b:08:5a:d4 (capab=0x411 status=0 aid=5)
[273452.601020] wlp0s20f3: associated 
[273477.237185] wlp0s20f3: Connection to AP 5c:62:8b:08:5a:d4 lost
[273511.903805] wlp0s20f3: authenticate with 5c:62:8b:08:5a:d4 (local address=98:bd:80:af:12:b1)
[273511.904205] wlp0s20f3: send auth to 5c:62:8b:08:5a:d4 (try 1/3)
[273511.906845] wlp0s20f3: authenticated
[273511.908823] wlp0s20f3: associate with 5c:62:8b:08:5a:d4 (try 1/3)
[273511.911793] wlp0s20f3: RX AssocResp from 5c:62:8b:08:5a:d4 (capab=0x411 status=0 aid=2)
[273511.914526] wlp0s20f3: associated
[273527.815930] tun0: deleting peer with id 0, reason 2
[273613.022064] iwlwifi 0000:00:14.3: missed beacons exceeds threshold, but receiving data. Stay connected, Expect bugs.
[273613.022078] iwlwifi 0000:00:14.3: missed_beacons:19, missed_beacons_since_rx:2

It's essentially random, though.

lspci reports 00:14.3 Network controller: Intel Corporation Meteor Lake PCH CNVi WiFi (rev 20)

Is it a known issue? Perhaps there is a fix?

Got almost everything scaled up to a 2880x1800 display, except fcitx for Chinese character input.

https://github.com/fcitx/fcitx/issues/439 -- it's a known issue but the repo has been archived.

So -- 1/ is there a way to get fcitx to display nicely on higher-resolution screens? 2/ If not, what is the current recommended way forward for Chinese input in Ubuntu?

(To clarify, this is only a display issue -- fcitx works cleanly, it's just that the character selection menu is unreadably small.)

I am experiencing severe Input/Output errors and filesystem crashes on a recently installed NVMe. The drive works perfectly when under continuous, light load, but completely drops its connection to the motherboard during heavy loads or after waking from system sleep/suspend.

Specs:

• OS: Ubuntu 26.04 LTS (Resolute Raccoon) x86_64

• Hardware: Lenovo IdeaPad 3 15IAU7

• CPU: 12th Gen Intel Core i3-1215U

• RAM: 8GB

• Kernel: Linux 7.0.0-15-generic

• Storage device: FORESEE 512GB NVMe (installed 3 weeks ago)

Symptoms:

• Sleep/wake crash (the main issue): If I leave the laptop idle long enough for it to go into deep sleep/suspend, waking it up causes an immediate system lockup. I get dropped to a black screen with a wall of errors indicating the drive has vanished:

• EXT4-fs error (device nvme0n1p2)

• journal has aborted

• Buffer I/O error on dev nvme0n1p2, logical block...

• Heavy load drops: When running heavy tasks (like a Node.js project with many browser tabs open), maxing out the physical RAM forces the system to use the SSD for Swap. During this, background services randomly crash (my Wi-Fi drops out, or the audio server crashes and my mic stops working).

• Active idle crashes: Initially, the system was also throwing systemd-journald: Failed to write entry I/O errors during active use.

I tried:

• Tested hardware health: I ran the motherboard's built-in diagnostic and checked the S.M.A.R.T. data. The drive passes with 0 critical warnings, 0 media/data integrity errors, and 100% health. The physical memory chips seem perfectly fine.

• Reseated the drive: I opened the laptop and physically reseated the NVMe drive to rule out a loose connection.

• Applied APST workaround: To fix the active idle crashes, I added nvme_core.default_ps_max_latency_us=0 to my GRUB parameters. This successfully stopped the crashes while the screen is on, but it did not fix the deep suspend/wake issue.

It seems the controller firmware on this FORESEE NVMe drive fundamentally fails to handle Linux power state transitions (specifically waking from system suspend). Aside from completely disabling sleep mode or buying a Western Digital/Samsung drive, are there any other kernel parameters (like disabling specific PCIe power management features) that can force this specific SSD controller to wake up properly?

Is it normal for Firefox Snap to reinstall itself automatically after being uninstalled? I don't understand.

I installed Firefox via PPA, set up the keyboard shortcuts, and created the .desktop shortcut for this version of Firefox. And now everything is back to the way it was before.

I tried Ubuntu 26.04 for a week, and aside from a few minor issues, this is the most serious one.
If snaps install themselves automatically, it starts to feel more like Windows.

I can tolerate automatic updates for installed snap packages, but not this one.

I am experiencing lagging in apps when disk activity is high. I am not sure if this happens in every app, but it usually happens in Brave web browser, Steam, video games, and the file explorer.

The lag happens continuously. At first it doesn't lag/freeze, then the app freezes followed by the window not responding. I can still interact with the not responding window. A few moments later the app starts to work well again. A few moments later it starts lagging again.

The lag only happens when the disk activity is high. In the worst scenario, it makes my mouse freeze completely.

I am assuming it happen when there's intensive read/write activity (e.g. downloading and installing). Is this normal in Ubuntu?

I tried :

changing my browser to the snap version, and turning off GPU acceleration,

Creating new sysctl.conf file:

vm.dirty_background_ratio = 5 
vm.dirty_ratio = 15 
vm.swappiness=10

Updating BIOS to the latest version.

Hardware info:

• OS : Ubuntu 26.04 LTS
• CPU : Ryzen 5 5600 3.5 Ghz 6 Core
• RAM : 8 Gb x 2 DDR4 3200 mhz
• Mobo : MSI B550-A Pro
• GPU : RTX 3050 6 gb vram
• Nvidia Driver : 595.71.05 CUDA version : 13.2
• Storage : Adata Legend 710 SSD PCIe Gen3 x4 M.2 512 gb (324.7 Available space)

Software info:

udin@udin-MS-7C96:/$ uname -r
7.0.0-15-generic

udin@udin-MS-7C96:/$ sysctl vm.swappiness
vm.swappiness = 60

Additional info:

Screenshots of Resources and sudo iotop --only after I downloaded things and after Brave freezing, in this case I am downloading unity editor

Resources screenshot

Results of sudo iotop --only:

iotop --only screenshot

Edit

Result of top when slowdown happen (the slowdown usually happen when wa above 50.0) : top screenshot

Result of free when slowdown happen :

udin@udin-MS-7C96:/$ free
               total        used        free      shared  buff/cache   available
Mem:        15768924     3996676     6303516      335644     6139692    11772248
Swap:        4194300         620     4193680

I have a problem with WiFi dongle based on an RT2800 chip. It works fine on my Linux Mint PC. dmesg looks like this:

[15865.859508] usb 3-1: new high-speed USB device number 5 using xhci_hcd
[15866.003301] usb 3-1: New USB device found, idVendor=148f, idProduct=3070, bcdDevice= 1.01
[15866.003316] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[15866.003324] usb 3-1: Product: 802.11 n WLAN
[15866.003331] usb 3-1: Manufacturer: Ralink
[15866.003338] usb 3-1: SerialNumber: 1.0
[15866.117721] usb 3-1: reset high-speed USB device number 5 using xhci_hcd
[15866.254431] ieee80211 phy1: rt2x00_set_rt: Info - RT chipset 3070, rev 0201 detected
[15866.339176] ieee80211 phy1: rt2x00_set_rf: Info - RF chipset 0005 detected
[15866.340108] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[15866.369587] rt2800usb 3-1:1.0 wlx006a3f32f368: renamed from wlan0

On my laptop with a live USB Lubuntu it keeps reconnecting in an endless loop.

[   52.618298] Bluetooth: RFCOMM ver 1.11
[   63.426328] logitech-hidpp-device 0003:046D:4054.0006: HID++ 4.5 device connected.
[   97.837000] usb 2-2: new high-speed USB device number 9 using xhci_hcd
[   98.002551] usb 2-2: New USB device found, idVendor=148f, idProduct=3070, bcdDevice= 1.01
[   98.002568] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   98.002575] usb 2-2: Product: 802.11 n WLAN
[   98.002580] usb 2-2: Manufacturer: Ralink
[   98.002585] usb 2-2: SerialNumber: 1.0
[   98.185335] usb 2-2: reset high-speed USB device number 9 using xhci_hcd
[   98.344142] ieee80211 phy1: rt2x00_set_rt: Info - RT chipset 3070, rev 0201 detected
[   98.355686] ieee80211 phy1: rt2x00_set_rf: Info - RF chipset 0005 detected
[   98.356087] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[   98.359998] usbcore: registered new interface driver rt2800usb
[   98.383099] rt2800usb 2-2:1.0 wlx006a3f32f368: renamed from wlan0
[   98.431937] ieee80211 phy1: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'
[   98.438942] ieee80211 phy1: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.36
[   98.717376] usb 2-2: USB disconnect, device number 9
lubuntu@lubuntu:~$ sudo modprobe -r rt2x00lib
modprobe: FATAL: Module rt2x00lib is in use.
lubuntu@lubuntu:~$

I've tried blacklisting rt2x00lib at the boot menu adding blacklist=rt2x00lib or modprobe.blacklist=rt2x00usb but it doesn't make any difference.

I have multiple users with thumbnail and these are shown in login screen. For the administrator which was created during install it is set as well, but NOT showing in login. Privileges are fine (or at least the same as other).

Can someone advice why it's not shown?

Back in the 90s I remember being amazed at the 'dancing postage stamp' videos of the time. I now know that many of these dancing stamps were Cinepak videos. Can I use a modern FFmpeg under Ubuntu to recreate one of these early movies and make it as authentically '90s' as possible?

I made a list on the bash with all the packages installed on Ubuntu.

Trying to restore them to another computer also with Ubuntu, I receive an error message saying that they are not on database.

With this command I made the list:

dpkg --get-selections > list_packages.txt

Then I imported the selection list to the package manager with this command:

sudo dpkg --set-selections < list_packages.txt

Finally, I tried to install the packages with this command:

sudo apt-get dselect-upgrade

There, the message says: packages not in database.

Trying to install them on dissimilar hardware with the same Operating System, I acknowledge the solution.

I'm using rEFInd as my boot manager and I want to boot Ubuntu 26.04 directly by loading the kernel (vmlinuz), bypassing GRUB entirely and without displaying the GRUB menu. I tried several setup and examples but with no sucess. I don't want to remove grub but just skip it at boot. I need generic rEFInd loader that does not hardcode a kernel version, to always load the latest kernel.

Ubuntu 26.04 on EFI rEFInd installed from repo

$ lsblk -f
nvme0n1                                                                                   
├─nvme0n1p1
│       vfat    FAT32         xxx  181M    40% /boot/efi
├─nvme0n1p2
│       ext4    1.0   ubuntu  xxx  101,6G  18% /

$ ls -alh /boot
total 232M
drwxr-xr-x  4 root root 4.0K May 16 17:23 .
drwxr-xr-x 19 root root 4.0K Apr 29 19:44 ..
-rw-------  1 root root  11M Apr 13 10:12 System.map-7.0.0-14-generic
-rw-------  1 root root  11M Apr 22 16:02 System.map-7.0.0-15-generic
-rw-r--r--  1 root root 302K Apr 13 10:12 config-7.0.0-14-generic
-rw-r--r--  1 root root 302K Apr 22 16:02 config-7.0.0-15-generic
drwxr-xr-x  4 root root 4.0K Jan  1  1970 efi
drwxr-xr-x  5 root root 4.0K May 22 17:24 grub
lrwxrwxrwx  1 root root   27 Apr 29 19:44 initrd.img -> initrd.img-7.0.0-15-generic
-rw-------  1 root root  89M Apr 29 17:59 initrd.img-7.0.0-14-generic
-rw-------  1 root root  89M May 16 17:23 initrd.img-7.0.0-15-generic
lrwxrwxrwx  1 root root   27 Apr 23 02:48 initrd.img.old -> initrd.img-7.0.0-14-generic
-rw-r--r--  1 root root 153K Nov 29 09:22 mt86+ia32
-rw-r--r--  1 root root 158K Nov 29 09:22 mt86+x64
-rw-r--r--  1 root root  252 May  4 16:42 refind_linux.conf
lrwxrwxrwx  1 root root   24 Apr 29 19:44 vmlinuz -> vmlinuz-7.0.0-15-generic
-rw-------  1 root root  17M Apr 27 18:30 vmlinuz-7.0.0-14-generic
-rw-------  1 root root  17M Apr 22 16:05 vmlinuz-7.0.0-15-generic
lrwxrwxrwx  1 root root   24 Apr 23 02:48 vmlinuz.old -> vmlinuz-7.0.0-14-generic

What I've tried, adding in /boot/efi/EFI/refind/refind.conf

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /vmlinuz
    initrd /initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /boot/vmlinuz
    initrd /boot/initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /boot/efi/vmlinuz
    initrd /boot/efi/initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

I am a journalist, and I need a translation tool that works in Ubuntu 24.04 completely offline (without an internet connection). What application can you recommend for this purpose?

Usually you'd have the source code somewhere like in a GitHub repository, then you would run some CI/CD pipelines to create a release. Where is that source code? I did some research and many people say that the Ubuntu distribution is just a collection of programs and configurations and that it doesn't really make much sense to have a repository like I'm describing, but that's not what I am asking.

When you develop a web app with Node.js, you have your dependencies listed in a file called package.json. When you build your web app you download your dependencies. I assume something similar happens with Ubuntu: There must be a file somewhere listing all programs that the distribution must include and the URLs to download each binary. Where is that file? Where exactly is also the script that downloads them? In GitHub you have a .yaml file with different GitHub actions that you can look at to understand the exact steps followed to create a release.

Where do I look at to understand exactly how the Ubuntu iso is created? Let's just say it was my responsibility to create the next release. How would I do that? And the one thing I am most worried about is: If Ubuntu is open source, where is all this documented?

This is a list of the questions that I pretended to have answered with this post. If this post is considered too broad because of this and gets closed, I'll post these questions in different posts:

• What exactly constitutes the Ubuntu iso file that you download when you "download Ubuntu"? Is it just Debian but with more packages, or is there anything else included?
• What exact steps do I have to follow to create the iso file that gets released exactly the same way Ubuntu developers do?
• If Ubuntu developers were using Github Actions to create Ubuntu releases, there would be a workflow yaml file I could inspect to understand the steps followed to create the iso file. If there isn't such a thing, what do they use instead and where can I find that thing they use?
• Each package that the Ubuntu distro includes is maintained independently, but where is the one Git repository that contains the manifest file used to specify these packages that get included in the iso file?

Here is some context: Usually, when I want to understand how some software works, I build the software from source code. The steps followed to build from source are usually either in a README or a CONTRIBUTING file. When I can't find these files, I look at whatever yaml file they use to configure their pipelines to create releases. I wondered how an operating system like Ubuntu is created, so I started looking for such repository but found nothing. I just learned that the packages the iso includes are specified in a manifest file like this one, but I still couldn't find the Git repository where this file comes from and I don't know if that's about it or if there is more involving the creating of an Ubuntu iso. I hardly believe that you only need the manifest file, it doesn't feel like installing all packages specified in it from a Debian distro would automatically turn that Debian into Ubuntu.

I came across this post, which led me to this website. If that's the source code of Ubuntu, how do I generate the iso file from the contents of that website? I couldn't find any README or CONTRIBUTING file explaining this.

When I hit Take Screenshot item from the Flameshot menu, now it pops what I guess is the native Ubuntu screenshot tool, instead of the Flameshot one.

To be fair, I don't know what was the update affecting it. All I know is that it has been working flawlessly for years and now it suddenly stopped working, and it makes me sad.

In case it helps:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.3 LTS
Release:    22.04
Codename:   jammy

BTW, it also happens if I use the console command:

$ flameshot gui
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Qt: Session management error: Could not open network socket
flameshot: error: Unable to capture screen
flameshot: error: Unable to capture screen
flameshot: info: Screenshot aborted.

I would provide a screenshot, but I don't like the native tool for doing that.

I'm on a bare-bones, minimum install of Ubuntu 22.04.02 LTS, 64-bit, on a pretty limited machine. With this minimum install, the syslog is filling up with error messages:

gnome-shell[4500]: gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed
gnome-shell[4500]: message repeated 277 times [ gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed]
gsd-media-keys[4627]: gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed
gsd-media-keys[4627]: message repeated 277 times [ gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed]

over and over and over and over again. I have tried switching to Xorg as another users reported that this resulted in one (1) throw of the error, but I did that and there was no change. I had to limit the size of the syslog to prevent this from completely filling up my drive.

I'm very new to unix, so I'm not really sure how to find out what it is that is causing this error to endlessly repeat. I've Googled for information but don't find much that is later than 2022 (except for the one Xorg-related solution, which as mentioned did not work for me).

What commands, if any, can I use to track down the source of this error message? Thank you in advance!

I am writing a script where I need to switch WiFi networks. How should I scan if the WiFi I want to connect is available or not?

I tried the following:

1. nmcli dev wifi list

   Issue: It lists previously scanned networks, which includes available and non-available networks.

2. nmcli dev wifi rescan; sleep 10; nmcli dev wifi list;

   Issue 1: It just starts the scan and exits while the scan is running in the background. I could not find how to detect if the scan is finished or not. So I used added waiting time of 10 seconds.

   Issue 2: Even after the scan is finished (After 10 seconds), it is still listing the recently turned off WiFi networks.

3. nmcli radio wifi off ; sleep 1; nmcli radio wifi on; sleep 4; nmcli dev wifi list

   This one is the worst unexpected. It still shows the WiFi networks which are turned off.

Running the commands as root does not make any difference.

What is wrong with the nmcli? What am I doing wrong?

System information:

OS:
    Ubuntu 20.04 Desktop.

Driver: 
    Kernel driver in use: rtl8821ce

Laptop:
    hp 15 dy1751ms

WiFi
    product:      RTL8821CE 802.11ac PCIe Wireless Network Adapter
    vendor:       Realtek Semiconductor Co., Ltd.
    physical id:  0
    bus info:     pci@0000:01:00.0
    logical name: wlo1
    serial: xx:xx:xx:xx:xx:xx
    width: 64 bits
    clock: 33MHz
    capabilities: bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=rtl8821ce ip=192.168.10.12 latency=0 multicast=yes wireless=IEEE 802.11bgn
    resources: irq:137 ioport:3000(size=256) memory:8050000-8050ffff

I am trying to format my external hard drive which contained some important data and was earlier formatted as exFAT. The external hard drive (Transcend 1TB) was bought 6 months prior and it does not get mounted on Ubuntu. But the drive is visible in disks utility. Following is the image:

I tried this link for solution as the question contained the same error as I am getting while formatting the hard disk.

As per the link stated I installed gparted after opening it gives me error Input/Output error during read on /dev/sdb.

I ignored the error and after I select my device from drop down of gparted following image is the outcome.

Can I retrieve my data and device? If I can not retrieve my data can I format the disk for reuse?

Or is the disk completely damaged?

I'm using Ubuntu with Gnome. My multimedia keys (play/pause, stop, etc) were working fine and then all of a sudden they stopped working.

In particular I'd like for them to work with Spotify.

This is pertaining Ubuntu 18.04 LTS. I tried to save space by removing unneeded Linux kernel, but looks like it will still install other kernel image that is "Unsigned". Why is this?

Here is the log:

root@ubuntu18:~# apt-get remove linux-image-4.18.0-15-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  linux-image-unsigned-4.18.0-15-generic
Suggested packages:
  fdutils linux-hwe-doc-4.18.0 | linux-hwe-source-4.18.0 linux-hwe-tools
The following packages will be REMOVED:
  linux-image-4.18.0-15-generic linux-modules-extra-4.18.0-15-generic
The following NEW packages will be installed:
  linux-image-unsigned-4.18.0-15-generic
0 upgraded, 1 newly installed, 2 to remove and 8 not upgraded.
Need to get 8,219 kB of archives.
After this operation, 168 MB disk space will be freed.
Do you want to continue? [Y/n]

The original Linux kernel version that ships with the distro appears to be version 4.18. The new version that was just installed was 5.0. So I wonder if there is a reason to "preserve" 4.18.

Wirawan

The other day I decided I might try to make some music on Ubuntu 18.04. I have a synthesizer that can work on its own, but it can also send an receive MIDI, namely a Novation MiniNova.
So I downloaded LMMS from the Software Store, created a tune in it without the use of the keyboard. Up until this point, no problems.

Now, when I plugged in my MiniNova, I expected to just run a few commands and be done with it. How wrong could I be. LMMS didn't recognize my keyboard, neither did KMidiMon. I followed this guide by a bloke named Ted and followed every step closely up until the point where I had to run cat /proc/asound/cards to figure out what ALSA named my sound card. I used sox to generate a 440 Hz sine .wav file, then I typed aplay -D hw:1 test.wav and I heard the sine wave through my laptops speakers.
lsusb gave me the MiniNova in the list, but adding the verbose option told me that it Couldn't open the device, some information missing.which seems weird to me.

I did come across a weird little thing when I decided that it couldn't hurt to run LMMS through a terminal. When I did, I got the following result:

ALSA lib rawmidi_hw.c:233:(snd_rawmidi_hw_open) open /dev/snd/midiC0D0 failed: No such file or directory
cannot open MIDI-device: No such file or directory
Couldn't create MIDI-client, neither with ALSA nor with OSS. Will use dummy-MIDI-client.
Connection established.

Stream successfully created

MidiClientRaw: unhandled MIDI-event 176

MidiClientRaw: unhandled MIDI-event 176

MidiClientRaw: unhandled MIDI-event 176

The last three messages were after opening the project I had been working on.

If it's helpful, here are links to my results after typing:

• aplay -l
• cat /proc/asound/cards

Thanks in advance, WalrusGumboot

When entering the sudo password, the • characters are hidden.

Apparently the • are omitted for better security. They seem secure enough to me, and I don't see why they're not used.

I think I'm missing something here...

Could anyone clarify?

I added the following command in crontab -e:

15 * * * * php /home/rizwan/PHP-workspace/mgstore/testcron.php

I need to run testcron.php every 15 minutes; for testing purposes I used the following PHP code in testcron.php:

<?php 
echo "test";

15 * * * * /usr/bin/php /home/rizwan/PHP-workspace/mgstore/testcron.php >> /home/rizwan/cron.out 

this was working .but i have one php script,for adding customers from magento to ERP,when i run script manually,it asks for authorization,after accepting it creates customers into ERP from magento,I need whenever i added customer in magento after 5 or 10 mins this script should run and add the customer to ERP.how this can be done ?,If any one have any idea,please help ?