I had to rebuild my FLASH disk after a rebuild that used Ubuntu Server 24 first (because the DVD no longer contains the full Ubuntu Desktop configuration). Neither logout/login nor full reboot after the described removals works.

The previous successful answer was to rm -Rf ~/.cache/thumbnails/fail

from Ubuntu 24.04 File thumbnails not visible on desktop

That no longer works for me.

I sincerely hope the only workable answer now ISN'T starting from Ubuntu 22.04 and doing an online full system rebuild.

I recently noticed that my scene in a new Unity project was lagging/getting choppy even though it was just a tilemap with a handful (~10) game objects thrown in. Looking in the profiler I found that there was a thread called “Audio PulseAudio Mixer” that seemed to be causing large frame time spikes: from ~5ms to ~125ms. This seemed strange because there is no audio in the game. No audio listener, even. Nothing that I am aware of that could remotely require any activity in an audio thread. I even have "Disable Unity Audio" checked in Project Settings.

I’m on Ubuntu 24.04.4 as a recent Windows refugee, and my (limited) understanding is that ~~PulseAudio was standard before 24.04 when it was replaced with PipeWire.~~ PipeWire is a wrapper for PulseAudio:

pactl info | grep 'Server Name'

returns

Server Name: PulseAudio (on PipeWire 1.0.5)

I have no idea if that means anything.

I am aware that Unity is still a work-in-progress on Ubuntu, but I am very keen to not have to go back to Windows (or head over to Mac).

Many thanks for any help.

(This question is no longer cross-posted on GameDevSE)

Edit: I'm using a Focusrite Scarlett 2i2 (3rd Gen) audio interface, if that's at all relevant.

As the title says. I have Ubuntu 26.04 LTS and the Top Bar icon for Livepatch is missing. I did have to go to /etc/update-manager/release-upgrades to change the prompt to "Prompt=lts" so it can be on LTS (install put it on the standard release cycle for some reason). Livepatch is enabled and the icon is on as well, but none are present. Help me figure this out please.

Please inform us when the official patch for CVE-2026-31431 will be available

I have a script I use to allow me to plug in a second keyboard and change what keys are sent when pressed. I use it to send key combinations that execute macros in my audio editing software. It's become a vital part of my workflow. Here is the script:

#!/usr/bin/env python3

import os
from evdev import InputDevice, categorize, ecodes
#dev = InputDevice('/dev/input/event6') # Do not use event numbers for identifying keyboard as they change with reboots.
dev = InputDevice('/dev/input/by-id/usb-CHESEN_USB_Keyboard-event-kbd') # Use IDs for identifying keyboard as they do not change with reboots.
dev.grab()

for event in dev.read_loop():
  if event.type == ecodes.EV_KEY:
    key = categorize(event)
    if key.keystate == key.key_down:
        if key.keycode == 'KEY_ESC':
            os.system("xte 'keydown Control_L' 'keydown KP_0' 'keyup KP_0' 'keyup Control_L'") # Fill TS with 50ms roomtone
        elif key.keycode == 'KEY_F1':
            os.system("xte 'keydown Control_L' 'keydown KP_1' 'keyup KP_1' 'keyup Control_L'") # Fill TS with 100ms roomtone
        elif key.keycode == 'KEY_F2':
            os.system("xte 'keydown Control_L' 'keydown KP_2' 'keyup KP_2' 'keyup Control_L'") # Fill TS with 150ms roomtone

How do I change this script to work with Wayland? As I understand it, it uses things like evdev and xte, not sure what else, which don't work in Wayland.

In looking into this, I've seen reference to an issue with the commands sending multiple keys rather than the lines of the script being for simple substitutions. I don't see anywhere how to deal with this in Wayland.

I'm not a coder by a long shot and no longer remember how this was put together.

So for some reason whenever I try to use bluetooth on my laptop only one window produces sound while the other only produce sound when said window is also making sound. I remember I had a similar issue with this in windows 11 and I'm not entirely sure why it's happening here. The sound page in settings acts like my device works and in pavucontrol when I switch my bluetooth device between SBC and SBC-XQ it work for like a second and then silence. I'm using a fully installed Kubuntu 26. Please help.(btw this happens in both pulseaudio and pipewire)

Just picked up a new Asus Zenbook S16 (UM5606GA) Ryzen AI 9 465

I have attempted to install ubuntu quite a few times along with a bunch of other linux flavors. They all have the same issue.

First off When installing ubuntu I have to use "nomodeset" at grub for the live installer and after install.

2nd and most important is I can not get the Laptop speakers to work, I have done various searches, tried a bunch of fixes, Tried to use AI to help me figure it out.

As far as I can tell, There is no "map" for this machine, and all I get is Dummy output. From what I have figured out it has something to do with the Cirrus Amplifier and Ubuntu/any other linux can not seem to activate the Amps and can not map the speakers. All I can get is HDMI out and Headphone out. I was wondering if anyone else has had this issue and may have advice other than waiting for it to get put into the kernel.

also, I have attempted mainline kernels as well. No Luck.

Specs:

• KDE Plasma Version: 5.27.12
• KDE Frameworks Version: 5.115.0
• Qt Version: 5.15.13
• Kernel Version: 5.15.13 6.8.0-111-generic (64-bit)
• Graphics Platform: X11
• Processors: 16 x Intel Core I9-9900K CPU @ 3.60GHZ
• Memory: 31.3 GiB of RAM
• Graphics Processor: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2

Deduced my issue to a faulty Nvidia graphics card driver, so I'm currently stuck in emergency mode. I tried to replace it with a previously tested driver, but apt-get is somehow now failing.

Err: could not return resolve 'archive.ubuntu.com'.

If more info is needed, please let me know.

In the terminal how do I change the GFX driver Nvidia 580, installed in error, to the Nvidia 535 which is recommended for the Nvidia GeForce RTX 3060. Followed by cleaning up any drivers which have been used in the past?

Question

What steps are required to safely upgrade a Ubuntu 20.04 running a RAID1 (btrfs native RAID) with full disk encryption, including /boot, to 24.04?

Background

Ubuntu 20.04 was the original OS upon installation. The RAID and FDE was set up when it was installed.

I want to upgrade to 24.04. I know that I have to first upgrade to 22.04. I believe that 22.04 saw significant changes with systemd and cryptsetup, hence my concern.

Info

Running

$ lsblk -f

yields the following (with irrelevant omitted, and UUIDs redacted)

nvme0n1                                                                               
├─nvme0n1p1     vfat              XXXX-XXXX                             504.9M     1%  /boot/efi
├─nvme0n1p2     swap              xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                
│ └─cryptswap_A swap              xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                [SWAP]
└─nvme0n1p3     crypto_LUKS       xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                
  └─crypt_A     btrfs             xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx   83.5G    60% /home
nvme1n1                                                                               
├─nvme1n1p1     btrfs             xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                
├─nvme1n1p2     swap              xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                
│ └─cryptswap_B swap              xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                [SWAP]
└─nvme1n1p3     crypto_LUKS       xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx                
  └─crypt_B     btrfs             xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

Saved docs/configs

In case something breaks during upgrade/reboot, I have created backups of various files/command outputs, which will be accessible on a different computer.

The following files:

/etc/cryptab
/etc/fstab
/etc/default/grub
/boot/grub/grub.cfg
/etc/cryptsetup-initramfs/conf-hook

The following commands:

$ sudo btrfs filesystem show
$ lsblk -f
$ sudo dmsetup ls --tree
$ sudo btrfs subvolume list
$ sudo cryptsetup luksHeaderBackup /dev/nvme0n1p3 --header-backup-file nvme0n1p3-luks-header-backup.bak
$ sudo cryptsetup luksHeaderBackup /dev/nvme1n1p3 --header-backup-file nvme1n1p3-luks-header-backup.bak

Interim questions

1. Are those the correct luksHeaderBackup files I should have created (based on the lsblk -f info)?
2. Are there other files or command outputs I should back up?
3. Are there other issues or concerns I should have about the efi?
4. Do I need to do something special with grub before my first reboot into 22.04, like the following?

$ sudo grub-install nvme0n1

Next steps

1. With all of the above done, can I simply use the Ubuntu GUI to perform a release upgrade to 22.04?
2. Once that is completed (and confirmed that everything is working well), can I then simply perform yet another release upgrade to 24.04?
3. What I am missing?

Thanks so much for any feedback or help you can provide.

I followed the instructions in another thread to fix something, but since it didn't work, I'd like to go back and restore the original configuration.

So, as the title says, how can I restore and go back after running these commands?

sudo chmod -R ugo+rX /lib/python3.12/
sudo chmod -R ugo+rX /lib/python3/dist-packages/

I'm a beginner using a dual-boot system: Windows 11 and Ubuntu 2604LTS. I want the shared partition to be automatically mounted every time I boot into Ubuntu. I've tried several times with Nano but it doesn't work. I've taken some pictures; could you please take a look?

I can use a tethered connection but there is no option for a wifi connection when I use Ubuntu from a USB.

I saw Dirty Frag: Universal Linux LPE (CVE-2026-43284 and CVE-2026-43500), which yields a root shell (!) on 24.04.4.

In an (isolated) 26.04 x86-64 VM, I've reproduced it with both V4bel/dirtyfrag and 0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo.

How should I patch my system to secure it from this vulnerability?

This week my OS updated a few packages and after the update my nvidia drivers stopped working. I was using nvidia-driver-580-open and tried switching to nvidia-driver-590. The computer still felt laggy so I tried switching back to the 580 drivers but I ran into the following issue

    Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 linux-modules-nvidia-580-open-generic-hwe-24.04 : Depends: linux-modules-nvidia-580-open-6.17.0-23-generic (= 6.17.0-23.23~24.04.1+1) but it is not going to be installed
                                                   Depends: nvidia-kernel-common-580 (>= 580.142) but 580.126.09-0ubuntu0.24.04.2 is to be installed
E: Unable to correct problems, you have held broken packages.

I also tried using

ubuntu-drivers autoinstall

as well as purging, updating and re-installing the drivers.

I am using Ubuntu 24.04 LTS and have a 3060 RTX Mobile

Currently I've tried the 570 and they showed the same issue as the 590, laggy, without smooth transitions in the desktop and couldn't run games. And I've also tried the 535 drivers that led me to have to log in with tty4 to purge them.

When I try to manually install the packages manually

sudo aptitude -f install nvidia-kernel-common-580 
The following NEW packages will be installed:
  nvidia-firmware-580-580.126.09{a} nvidia-kernel-common-580 

I tried looking online and I couldn't find nvidia-kernel-common-580.142 available anywhere

After trying many solutions from Unable to correct problems, you have held broken packages, none of them worked as when I perform the install I do not have any nvidia related packages on my computer.

Currently the only drivers that somehow work are the Xorg drivers and that's what I'm trying to switch from into nvidia drivers.

It seems to me like the packages are still not available but I cannot confirm the issue is on my side

Also my sources list reads as

Types: deb deb-src URIs: http://pt.archive.ubuntu.com/ubuntu/ Suites: noble noble-updates noble-backports Components: main restricted universe multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg  Types: deb deb-src URIs: http://security.ubuntu.com/ubuntu/ Suites: noble-security Components: main restricted universe multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg 

I've now tried downgrading the kernel from version 6.17.0-23-generic to 6.17.0-22-generic, running into the same issues as before.

I also tried

sudo apt install ca-certificate
sudo rm -rf /var/lib/apt/lists/*
sudo apt update
sudo apt upgrade
sudo ubuntu-drivers autoinstall

And still got the same error as before

Ive had a fairly smooth experience on Kubuntu, only switched from Windows some time around X-Mas so I'm fairly new to linux. But a bit ago i had to mess around a little with the NVIDIA drivers. Don't remember why or what i did exactly and nothing seems to work badly ATM. But every time i log into the OS now i get this message:

32-bit NVIDIA driver files were not found on your host system. It is recommended that you install them for the best experience. To install:

sudo dpkg --add-architecture i386
sudo apt update
sudo apt install libnvidia-gl-595:i386

Entering the first line makes me type in my password and then does nothing anyway.

3rd line gives me this:

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package libnvidia-gl-595:i386 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libnvidia-gl-595:i386' has no installation candidate

I did go to the GitHub link that came with the message for more info, but it did not help. I also asked the AI to find me some solution to this, but it did not help. So the question is how do I get this installed? And if there for some reason is no way around this does it even matter? I don't want to ignore this and have it cause problems in the future because like I said things seem to work fine despite this message.

I have a computer running Ubuntu 24.04 LTS desktop where I have QEMU/KVM running. One of the guest OS is Windows 11. This VM has secure-boot on as required by Windows. The secure boot certificates originally issued in 2011 will expire next month. The new certificates were issued in 2023.

The above page shows a table of expiring certificates:

| **Expiring Certificate**                  | **Expiration date** | **New Certificate**                  | **Storing location** | **Purpose**                                          |
| ----------------------------------------- | ------------------- | ------------------------------------ | -------------------- | ---------------------------------------------------- |
| **Microsoft Corporation KEK CA 2011**     | June 2026           | Microsoft Corporation KEK 2K CA 2023 | Stored in KEK        | Signs updates to DB and DBX.                         |
| **Microsoft Windows Production PCA 2011** | Oct 2026            | Windows UEFI CA 2023                 | Stored in DB         | Used for signing the   Windows boot loader.          |
| **Microsoft UEFI CA 2011\***              | June 2026           | Microsoft UEFI CA 2023               | Stored in DB         | Signs third-party boot loaders and EFI applications. |
| **Microsoft UEFI CA 2011\***              | June 2026           | Microsoft Option ROM UEFI CA 2023    | Stored in DB         | Signs third-party option ROMs                        |

It looks like my VM is not using the new certificates. When I check the secure boot status from within Windows guest, it says:

Secure boot is on, but your device is using an older boot trust configuration that should be updated. There is not yet enough data to classify your device for automatic update.

This page says if I see this message then:

Your device might need additional validation before the update can proceed automatically. Visit aka.ms/getsecureboot for more information.

The link takes me back to the original page linked above.

This made me think Windows update failed to work with QEMU's UEFI firmware called OVMF.

The XML tab of the Overview section of the Virtual Machine Manager shows in part:

    <loader readonly="yes" secure="yes" type="pflash">/usr/share/OVMF/OVMF_CODE_4M.ms.fd</loader>
    <nvram template="/usr/share/OVMF/OVMF_VARS_4M.ms.fd">/var/lib/libvirt/qemu/nvram/win11_VARS.fd</nvram>

The files OVMF_CODE_4M.ms.fd and OVMF_VARS_4M.ms.fd have the modified date of December 10, 2025. The file OVMF_CODE_4M.ms.fd is linked to OVMF_CODE_4M.secboot.fd in the folder /usr/share/OVMF/.

I looked at the OMVF UEFI configuration menu and couldn’t find anything regarding the secure boot certificates or anyway to add new ones.

Here is the Windows 11 System log:

Log Name:      System
Source:        Microsoft-Windows-TPM-WMI
Date:          5/6/2026 2:37:16 PM
Event ID:      1801
Task Category: None
Level:         Error
Keywords:      
User:          SYSTEM
Computer:      Dev1-Win11
Description:
Updated Secure Boot certificates are available on this device but have not yet been applied to the firmware. 
Review the published guidance to complete the update and maintain full protection. 
This device signature information is included here.
DeviceAttributes: 
BaseBoardManufacturer:;
FirmwareManufacturer:Ubuntu distribution of EDK II;
FirmwareVersion:2024.02-2ubuntu0.8;
OEMModelNumber:Ubuntu 24.04 PC (Q35 + ICH9, 2009);OEMModelBaseBoard:;
OEMModelSystemFamily:;OEMManufacturerName:QEMU;OEMModelSKU:;OSArchitecture:amd64;
BucketId: 2a0656131aa2862c533c820200125d8c3c845a85144dde851c754bc22261465a
BucketConfidenceLevel: No Data Observed - Action Required
UpdateType: 
For more information, please see https://go.microsoft.com/fwlink/?linkid=2301018

My searches have led to some solutions for Red Hat, and Proxmox, but nothing specific to Ubuntu.

From the Linux perspective most solutions refer only to updating to the Microsoft UEFI CA 2023 certificate. I have not seen anything on how or if one should update the two other certificates expiring in June 2026 when running Windows in a VM.

Q: How do I make sure that the OMVF is using all the secure boot certificates from 2023 so that Windows 11 works as expected beyond June 2023?

Thanks

I'm experiencing a frustrating issue on a fresh install of Ubuntu 26.04 (GNOME 50). I'm using a Ryzen 5 7000 series laptop with integrated graphics.

The Problem: In applications running through XWayland, specifically Apache NetBeans and Steam, the mouse coordinates are completely misaligned. For example, when I click on the "File" menu (top left), the system registers the click on the search icon at the opposite end of the window.

Key Observations:

1. If I am very quick right after opening the app, the first click might work, but then it breaks.

2. This seems to be a coordinate offset issue between Wayland and XWayland.

3. I have already tried common fixes like gsettings set org.gnome.mutter.xwayland-grab-access-rules "['*']" without success.

4. Since Xorg is no longer available by default in the login gear icon for 26.04, I am stuck on Wayland.

Has anyone found a workaround for this input mapping bug in GNOME 50/Ubuntu 26.04? Is there a specific environment variable for Java/NetBeans to fix this offset?

Thanks in advance!

installed Kubuntu 26 hoping to resolve a recurring problem when trying to install older Linux versions. I'm using a dual boot setup on an HP Omen with an Nvidia RTX 4070 and an i7 13th gen. The best I've managed is to boot by modifying the GRUB configuration with pci=noapic. This allowed me to access the desktop, install the proprietary Nvidia595 driver, and it works. However, the sound from the speakers and the headphone jack doesn't work. Only Bluetooth works. I want to be able to remove the noapic command and boot normally. I've already disabled Secure Boot and tried everything I found online (drivers, other boot modes, other variations of noapic, nomodeset, etc.). Is there a patch that will fix this? Is one planned?

• Operating System: Kubuntu 26.04 LTS
• KDE Plasma Version: 6.6.4
• KDE Frameworks Version: 6.24.0
• Qt Version: 6.10.2
• Kernel Version: 7.0.0-15-generic (64-bit)
• Graphics Platform: Wayland
• Processors: 24 × 13th Gen Intel Core i7-13700HX
• Memory: 32 GiB of RAM (31.0 GiB usable)
• Graphics Processor 1: Mesa Intel UHD Graphics
• Graphics Processor 2: NVIDIA GeForce RTX 4070 GPU/PCIe/SSE2
• Laptop Manufacturer: HP
• Product Name: OMEN by HP Transcend Gaming Laptop 16-u0xxx
• System Version: Type1ProductConfigId

A few days ago, Software Updater notified me of new updates (including a kernel update), so I pressed the button to begin the update process. Then I ignored it and let it do its thing.

This morning, I noticed that the Software Updater window is still open. I clicked on it, and… it appears it never finished installing the updates. Specifically, it seems to have become stuck while configuring the kernel updates. If I expand “Details,” it looks like this:

Since it’s been stuck like this for days, I really don’t know what to do, now. I’m particularly worried about what will happen the next time the system boots (like, if it loses power or something and needs to restart).

Now, this could be a red herring, but: the only times I’ve previously had the Software Updater hang, it’s had to do with Keybase, where I’ve had problems similar to this: https://github.com/keybase/keybase-issues/issues/4206 The symptoms aren’t the same, though; previously, if Keybase has had to do with why Software Updater hangs, it hangs specifically when configuring an updated Keybase package, not a kernel update.

I’m running Ubuntu 24.04.1 on a ThinkPad P53.

Edit 2026-05-07: Well, following Daniel T’s answer, I opened a terminal window and did sudo killall dpkg and… strangely, it seemed to try again (in Software Updater) to configure the kernel package, once again hanging at the message about os-prober. I tried to capture the output in Software Updater, but I couldn’t seem to copy anything I’d selected. When I finally tried Shift+Ctrl+C (since that’s how you use the “copy” command in the terminal), it interpreted that as Ctrl+C, killed the dpkg process (I assume), and tried again to configure the package, hanging at the os-prober message. …I think I tried Ctrl+C once or twice more, and eventually Software Updater just told me (in its window, with no “Details” expandable) that the process was finished and some packages were left unconfigured (I forget the exact message). So I did sudo dpkg --configure -a in the terminal, and once again it tried to configure the package (this time in the terminal window), hanging at the os-prober message! Here’s the output:

tina@harmonia:~$ sudo dpkg --configure -a
Setting up linux-image-6.17.0-23-generic (6.17.0-23.23~24.04.1) ...
Setting up linux-image-6.17.0-22-generic (6.17.0-22.22~24.04.1) ...
Processing triggers for linux-image-6.17.0-23-generic (6.17.0-23.23~24.04.1) ...
/etc/kernel/postinst.d/dkms:
 * dkms: running auto installation service for kernel 6.17.0-23-generic
 * dkms: autoinstall for kernel 6.17.0-23-generic
   ...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-6.17.0-23-generic
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.17.0-23-generic
Found initrd image: /boot/initrd.img-6.17.0-23-generic
Found linux image: /boot/vmlinuz-6.17.0-22-generic
Found initrd image: /boot/initrd.img-6.17.0-22-generic
Found linux image: /boot/vmlinuz-6.17.0-14-generic
Found initrd image: /boot/initrd.img-6.17.0-14-generic
Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.

Since it keeps hanging at the os-prober message, I suppose this problem might have something to do with os-prober. I should note that this laptop came with Windows 11, and that I installed Ubuntu with a dual-boot configuration, but I don’t think I’ve used Windows 11 since installing Ubuntu. Anyway, it might be relevant.

I have a problem with thumbnails of graphic and video files on the desktop, I can't see their thumbnails. I only see the default icons of the files. How to fix it?

I'm in the US so a page is 8.5 inches by 11 inches ie. letter size orientation PORTRAIT

Whether it is an existing Writer document or a simple document of a few lines, it looks portrait oriented but when printed to a physical printer, it comes out in landscape orientation. Also a simple calc spreadsheet does the same thing.

Libreoffice as it comes with Ubuntu 23.10 or before (in my case that would be Ubuntu 22.04) - does not have the problem.

My printers are Canon iX6820, which are able to take paper up to about tabloid size - which is larger than the typical letter or legal size.

I'm hearing other large format printers, such as Epson Stylus Pro 3880 have a similar issue.

I'm running Ubuntu 22.04 in Windows 11 via WSL 2.0.4. Within Ubuntu, I've used sshfs to mount a remote directory to /media/remote1. My local Ubuntu user owns the mount point.

I want to access that mounted folder in Windows via the WSL network share. I can access the media folder in Windows Explorer (\\wsl.localhost\Ubuntu\media), but trying to access the mount folder results in pop-up an error saying "\wsl.localhost\Ubuntu\media\mount1 is not accessible. You might not have permission to use this network resource..."

The sshfs mounted folder is accessible from within Ubuntu.

I've also tried mounting it using a few variations of sshfs -o allow_other,default_permissions,ro but no luck.

What is needed to allow Windows to access a FUSE-mounted drive via the WSL network share?

The problem described in this article

How can I dismiss "Software Updates Installed" notification

continues to plague me and the fixes in that article do not work in my case. I hope someone here can help!

I too receive the notification:

Software Update Installed
An important OS update has been installed.

In my case, this relates to a component called

UEFI dbx

whose window title in the Ubuntu Store is 371. If I click on the item shown in the Ubuntu store, a new message appears:

Downloading change information...

which after many minutes does not appear to deliver results nor exit.

The remedy suggested in the linked article, check in /var/lib/PackageKit and remove offline-update-completed, does not work for me since there is only one file there, called transactions.db which is an SQLite database. I haven't tried to explore that, maybe I should?

Nor do I have gnome-software installed.

I do notice in my syslog:

integrity: Revoking X.509 certificate: UEFI:dbx
blacklist: Revoked X.509 cert 'Canonical Ltd. Secure Boot Signing: 61482aa2830d0ab2ad5af10b7250da9033ddcef0'
integrity: Revoking X.509 certificate: UEFI:dbx
blacklist: Revoked X.509 cert 'Debian Secure Boot Signer: 00a7468def'

which puzzles me... perhaps related?

In case this is useful, I am running Ubuntu Mantic / 23.10, to which I recently upgraded from Lunar / 23.04. Perhaps some of these revoked UEFI certificates, especially UEFI:dbx, are the cause of my problem and should be dealt with, somehow?

Thanks in advance for any and all help.

When I run my C program on Ubuntu 20.04, I get this run-time error:

Segmentation fault (core dumped)

I really need to find and view the core file, but I can't find it anywhere. Where is it, and how do I view the backtrace in it?

I am trying to remove/uninstall Firefox from Ubuntu 18.04. I have used sudo apt-get purge firefox. I have also deleted all the files I was told to delete for Firefox, but it is still there and opens.I don't like the new Firefox and don't want it. How can I remove it totally?

It isn't listed in the Software Apps, where you install or remove apps.

I have been trying to accomplish this task for years and every time I try it, I fail miserably and simply give up completely after Googling it and trying for hours. This time though, I decided to seek help from you!

Logically speaking, It should be a very straightforward simple task as follows:

Step 1: Right-click on the menu button, then go to "Edit Applications".

Step 2: Click on "Add new item", assign a menu entry name then create your launcher or command.

No matter how many variations of commands I try, it is never working out. I tried to launch the Konsole terminal then execute the command, but the Konsole is not holding still and closing automatically even after issuing the right flag to keep it running.

konsole -e anaconda-navigator --noclose

Specifying the command directly also does not work out and simply renders nothing on the screen.

anaconda-navigator

I wonder why it has to be very hard like that. Your help will be greatly appreciated!

My System Information - For Reference:

I installed PHP 5.6 and when I run php -v it shows

PHP 5.6.30-7+deb.sury.org~precise+1 (cli)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

but when I get phpinfo(); in index file show in header:

PHP Version 5.3.10-1ubuntu3.26

How can upgrade my php version?

I have installed Ubuntu 16.04 LTS on my laptop and connected it to an external monitor via an HDMI cable. I can easily change the brightness of the laptop screen but that does not affect the brightness of the external monitor. Is there any way to change the brightness of the external monitor as well?

Title says it all, I've tried wifi-hostapd-app but I always run into trouble while installing one of its dependencies, dnsmasq specifically. I read one of the workarounds is to disable Ubuntu's Network Manager, I'd rather not do that.