I got a bug in my Ubuntu. When i screenshot my screen, my cursor position previously would permanent. I can use cursor, but my cursor be duplicate. So if i take a screenshot in three, so my cursor can be three. The duplicate i mean is like the cursor like a picture that stick.
I'm new here. I have a problem. On Wayland I can't share my screen in Discord, so I wanted to switch to X11. I didn't have #WaylandEnable=false string in the config file, so I typed it myself. After reboot I have got a login loop. Ok, reinstalled Ubuntu. How to switch Wayland properly? :) GPU - Nvidia GeForce GTX 1660 super. Ubuntu - 26.04 LTS
Using firefox, and attempting to login to Cisco.com with valid credentials, I get stuck on a blank screen listing this URL: https://www.cisco.com/content/cdc/sso/token.html. It never recovers. Able to login using my other computers not running Kubuntu 26.04. Able to login to other websites with no issues... seems isolated to Cisco.com
Kwallet fail to import encrypted files. It does not show the initial wallet. Or if it imports the file, it does not show it as a new wallet. Deleting a wallet is also failing.
I decommissioned a desktop some time ago, but forgot to drop it from my free support account and I still think it counts in my allowable 5 systems. I'm trying to figure out if it actually still does, and if so, disable it so I have options to add newer machines in the future. Can this be done somehow?
I have tried all the answers at File manager in Ubuntu 20.04 not showing thumbnails
To summarize, I have tried installing and re-installing ffmpegthumbnailer, I have tried deleting ~/.cache/thumbnails, creating recommended symbolic links, rebooting, etc. I am not seeing any thumbnails in nautilus. I also tried installing nemo and didn't seen any thumbnails there. Until recently, I would see thumbnails for some media files but not others. But after attempting various solutions recommended in a similar thread for 20.04, I no longer see any thumbnails at all.
Given there is an ongoing attack on Ubuntu infrastructure - see Ubuntu Infrastructure including ppa.launchpadcontent.net not responding, returning 503 or other errors - and that although ubuntu security updates are working (for me), other components, such as launchpadcontent, have been unusable for about three days. I saw previous questions about mirrors, with one brief answer that are there are none. Hence, this question. Example "apt update" results in last hour (I retry this about every 12 hours):
Ign:5 https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu noble InRelease
Ign:6 https://ppa.launchpadcontent.net/xtradeb/apps/ubuntu noble InRelease
Ign:5 https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu noble InRelease
Ign:6 https://ppa.launchpadcontent.net/xtradeb/apps/ubuntu noble InRelease
Ign:5 https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu noble InRelease
Ign:6 https://ppa.launchpadcontent.net/xtradeb/apps/ubuntu noble InRelease
Err:5 https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu noble InRelease
Could not connect to ppa.launchpadcontent.net:443 (2620:2d:4000:1::81), connection timed out Could not connect to ppa.launchpadcontent.net:443 (185.125.190.80), connection timed out
Err:6 https://ppa.launchpadcontent.net/xtradeb/apps/ubuntu noble InRelease
Unable to connect to ppa.launchpadcontent.net:https:
I want to install Linux only on a Elitebook 8560p. After install i cant boot anything and it shows the SSD has no OS installed on it. What should i do?
same goes with bazzite or Nobara
I'm attempting to install Ubuntu 26.04 Desktop on an older computer with an Intel i5-640 and 8 GB RAM. The Ubuntu live ISO boots fine and all applications are working except: (1) the App Center (until I disabled "opengl" in the system settings) and (2) the snap-based installer application.
When I attempt to launch the installer snap, it renders a full black window for a second before exiting.
ubuntu@ubuntu:~/Desktop$ MESA_DEBUG=1 /snap/bin/ubuntu-desktop-bootstrap
INFO ubuntu_bootstrap: Logging to /var/log/installer/ubuntu_bootstrap.log
Gdk-Message: 21:47:29.093: Unable to load from the cursor theme
INFO flavor_provider: Using default flavor: UbuntuFlavor.ubuntu
INFO subiquity_server: Waiting server up to 90 seconds
Gtk-Message: 21:47:29.168: Failed to load module "canberra-gtk-module"
INFO subiquity_server: ApplicationState.WAITING
INFO subiquity_client: Opening socket to Endpoint(/run/subiquity/socket )
DEBUG desktop: Disabling automounting
DEBUG telemetry: Writing report to /var/log/installer/telemetry
INFO subiquity_status: null => ApplicationStatus(state: ApplicationState.WAITING, confirmingTty: , error: null, nonreportableError: null, cloudInitOk: true, interactive: true, echoSyslogId: subiquity_echo.3280, logSyslogId: subiquity_log.3280, eventSyslogId: subiquity_event.3280)
DEBUG subiquity_client: POST http://localhost/meta/client_variant?variant=%22desktop%22
Mesa: error: GL_INVALID_ENUM in glGetIntegerv(pname=GL_READ_FRAMEBUFFER_BINDING)
DEBUG subiquity_client: ==> setVariant(Variant.DESKTOP) null
DEBUG subiquity_client: POST http://localhost/meta/mark_configured?endpoint_names=%5B%22mirror%22%2C%22proxy%22%2C%22ssh%22%2C%22snaplist%22%2C%22ubuntu_pro%22%5D
No provider of glBlitFramebuffer found. Requires one of:
Desktop OpenGL 3.0
GL_ARB_framebuffer_object
OpenGL ES 3.0
GL_EXT_framebuffer_blit
GL_NV_framebuffer_blit
Aborted (core dumped) "$@"
Looking at the OpenGL support on the machine:
ubuntu@ubuntu:~/Desktop$ glxinfo | grep -iE '^[^[:space:]0]|blit'
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
GLX version: 1.4
GLX extensions:
Extended renderer info (GLX_MESA_query_renderer):
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) HD Graphics (ILK)
OpenGL version string: 2.1 Mesa 26.0.3-1ubuntu1
OpenGL shading language version string: 1.20
OpenGL extensions:
GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_object,
OpenGL ES profile version string: OpenGL ES 2.0 Mesa 26.0.3-1ubuntu1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.0.16
OpenGL ES profile extensions:
So it seems like "blitting" (whatever that is) is exposed only via the OpenGL 2 API and not the OpenGL 3 API.
(P.S. Isn't this the sort of B.S. that snaps are supposed to avoid? Aren't the snaps shipped with all of their dependencies built in?!)
Update: I tried forcing the OpenGL API version:
ubuntu@ubuntu:~/Desktop$ MESA_GL_VERSION_OVERRIDE=3.0 glxinfo | grep -iE '^[^[:space:]0]|blit'
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
GLX version: 1.4
GLX extensions:
Extended renderer info (GLX_MESA_query_renderer):
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) HD Graphics (ILK)
OpenGL version string: 3.0 Mesa 26.0.3-1ubuntu1
OpenGL shading language version string: 1.40
OpenGL context flags: (none)
OpenGL extensions:
GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_object,
OpenGL ES profile version string: OpenGL ES 2.0 Mesa 26.0.3-1ubuntu1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.0.16
OpenGL ES profile extensions:
It did not help:
ubuntu@ubuntu:~/Desktop$ MESA_EXTENSION_OVERRIDE="+GL_EXT_framebuffer_blit" MESA_GL_VERSION_OVERRIDE=3.0 /snap/bin/ubuntu-desktop-bootstrap
INFO ubuntu_bootstrap: Logging to /var/log/installer/ubuntu_bootstrap.log
Gdk-Message: 22:12:05.778: Unable to load from the cursor theme
INFO flavor_provider: Using default flavor: UbuntuFlavor.ubuntu
INFO subiquity_server: Waiting server up to 90 seconds
Gtk-Message: 22:12:05.842: Failed to load module "canberra-gtk-module"
INFO subiquity_server: ApplicationState.WAITING
INFO subiquity_client: Opening socket to Endpoint(/run/subiquity/socket )
DEBUG desktop: Disabling automounting
DEBUG telemetry: Writing report to /var/log/installer/telemetry
INFO subiquity_status: null => ApplicationStatus(state: ApplicationState.WAITING, confirmingTty: , error: null, nonreportableError: null, cloudInitOk: true, interactive: true, echoSyslogId: subiquity_echo.3280, logSyslogId: subiquity_log.3280, eventSyslogId: subiquity_event.3280)
DEBUG subiquity_client: POST http://localhost/meta/client_variant?variant=%22desktop%22
No provider of glBlitFramebuffer found. Requires one of:
Desktop OpenGL 3.0
GL_ARB_framebuffer_object
OpenGL ES 3.0
GL_EXT_framebuffer_blit
GL_NV_framebuffer_blit
Aborted (core dumped) "$@"
I want to upgrade my desktop pc - currently running ubuntu 24.04 - to the latest version 26.04. I created a bootable usb drive with the latest iso image. When booting into the USB disk, I get the following error: spi-nor spi0.0: probe NovaCore unsupported chipset: boot 42 = 0x124a1002 (architecture 0x12, implementation 0x4). The installation stalls.
I've just upgraded to 26.04 and noticed that deborphan is missing in repos. Is there a record of the removal reason?
Yesterday I deleted some software I had installed to play some games (to no avail). Including wine and winetricks.
Today, when I tried to boot my computer, it just didn't work. I took photos of what the messages are.
Starting GRUB failed boot detection...
Starting Hold until boot process finishes up...
Starting Hostname Service...
[ OK ] Started Power Profiles daemon.
[ OK ] Started Switcheroo Control Proxy service.
Starting Save/Restore Sound Card State...
[ OK ] Stopped epson custom backend daemon.
[FAILED] Failed to start epson custom backend daemon.
See 'systemctl status ecbd.service' for details.
[ OK ] Finished GRUB failed boot detection.
[ OK ] Finished Save/Restore Sound Card State.
[ OK ] Reached target Sound Card.
[ OK ] Started Apache Tomcat 9 Web Application Server.
Starting Manage, Install and Generate Color Profiles...
[ OK ] Started Accounts Service.
[ OK ] Started Manage, Install and Generate Color Profiles.
[ OK ] Started GNOME Display Manager.
[ OK ] Started User Login Management.
[ OK ] Started Modem Manager.
[ OK ] Stopped epson custom backend daemon.
[FAILED] Failed to start epson custom backend daemon.
See 'systemctl status ecbd.service' for details.
[ OK ] Started Unattended Upgrades Shutdown.
[ OK ] Started Disk Manager.
_
The first picture is where my computer is stuck (for at least 15 minutes).
Then I tried the recovery mod and to repair broken dependencies (dpkg). It didn't work. I then understood I needed to activate the network. The dpkg did work more, but at some point said it couldn't go further and just stopped the processes and went back.
The last picture was when I got the computer to shut down after all this. First I just had a black screen, then I pressed the power button. It started to show lines rather quickly (that's the last picture), and then itshut down.
I also tried to boot on my USB flash drive (with Ubuntu 18.04), but I didn't manage to actually see my two other drives, so I'm rather lost on what I can do to solve this problem.
I wouldn't mind just scrap everything and reinstall, but first I'd need to save my data. I'm not sure how I could do it in this state.
Does anyone have an idea about how I could do it?
I have just tried to rename a file on a memory stick (ext4).
I have done this many times on the same memory stick.
This time I'm getting the error:
alan@AM5:/media/alan/writable$ sudo mv DEV/ 50DEV/
[sudo] password for alan:
mv: cannot move 'DEV/' to '50DEV/': Read-only file system
alan@AM5:/media/alan/writable$
Why? How to fix?
I run Ubuntu 24.04 LTS on a Lenovo laptop with Ryzen 3. I downloaded what the manufacturer calls a driver for the Manhattan 102049 type smartcard reader, but the "installation instructions" are insufficient and ridiculous. Following the instructions from technical support I got the system to recognize the reader and the inserted ID card, but I do not get the interface required for really using the reader for identification on line. What should I do?
I can't do much on busybox / initramfs because listing the partions / blocks returns nothing (I tested the ls /dev/sd* /dev/nvme* /dev/vd* 2>/dev/null I saw from this post
Same ending when starting on kernel 6.17.0-23-generic in recovery mode. Happily, kernel 6.17.0-22-generic still works (this is what I am currently using to write this post)
Can someone help me ?
What I did before getting this error : (I think) I was able to work on kernel 6.17.0-23-generic at least one time. But got some troubles to have my laptop HDMI output working. However, the HDMI on my USBC hub was working. So I decided to change the driver from X.org to NVIDIA driver 595-open. Reboot was needed, and since, I have this error message. Using older kernel 6.17.0-22-generic, I switched back to Xorg, but does not solved my initramfs alert.
I booted to my windows boot, to perform some update (included a lot of DELL bios updates) after getting this error. Still did not magically solved my error.
Ouput of sudo blkid :
/dev/nvme0n1p7: UUID="bd26295c-ba4d-4842-825a-f6d18d9e39aa" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="43b443de-457b-4c3b-a703-b809df0b8b23"
/dev/loop1: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop29: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop19: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/nvme0n1p5: LABEL="Image" BLOCK_SIZE="512" UUID="26260B4A260B1B07" TYPE="ntfs" PARTUUID="8ab846ce-c954-4df8-8446-2bc7e2f49f34"
/dev/nvme0n1p3: TYPE="BitLocker" PARTLABEL="Basic data partition" PARTUUID="9f5503c2-21a4-4912-985a-8b1754fceee3"
/dev/nvme0n1p1: LABEL_FATBOOT="ESP" LABEL="ESP" UUID="9C91-0681" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="7996296c-826a-4e45-b14b-bde50ed1b8b4"
/dev/nvme0n1p6: LABEL="DELLSUPPORT" BLOCK_SIZE="512" UUID="62B0AC18B0ABF129" TYPE="ntfs" PARTUUID="5e1e97fe-6cbc-4f07-9437-d0a3aad4f2be"
/dev/nvme0n1p4: LABEL="WINRETOOLS" BLOCK_SIZE="512" UUID="5E160B09160AE1BF" TYPE="ntfs" PARTUUID="2507d349-09cc-49c9-84fe-851a5a54d498"
/dev/nvme0n1p2: PARTLABEL="Microsoft reserved partition" PARTUUID="4b84bd57-13e9-46d9-a74c-32ec46221756"
/dev/loop37: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop27: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop17: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop8: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop35: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop25: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop15: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop6: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop33: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop23: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop13: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop41: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop4: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop31: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop21: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop11: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop2: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop38: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop0: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop28: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop18: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop9: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop36: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop26: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop16: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop7: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop34: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop24: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop14: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop5: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop32: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop22: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop12: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop40: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop3: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop30: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop20: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop10: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/loop39: BLOCK_SIZE="131072" TYPE="squashfs"
Happy Sunday everyone!
A fresh install of 26.04 is working brilliantly, and the CPU and GPU-related improvements are proving to be a welcome speed/quality upgrade to my system. However...
I use the default [Rygel] media sharing to watch videos on my TV simply by dropping them into my Videos folder on Ubuntu, and it was working fine in 24.04. However, I noticed that since my fresh install of 26.04 my .mkv videos are no longer served and do not appear in VLC local network discovery on both my TV and mobile.
The root cause is Gstreamer, which Rygel uses, unable to decipher .mkv files anymore; all other formats, e.g. MP4, are fine and I can see and play them. The error comes up as either 'unsupported pixel format' or 'failed to configure the buffer pool' depending which .mkv file I try. In case this problem was Rygel-specific, I installed the [now default] Showtime app, which is also Gstreamer-based, and sure enough, that comes back with 'unable to play video' on .mkv files with the detailed error being Gstreamer with the same two errors as above.
Please could someone confirm this bug for me? The easiest way is just to try to play any .mkv video using Showtime. I have restricted extras installed and all other codec/video libraries including good, bad and ugly. It would be interesting to hear from someone who does not have my ARM-based (Raspberry Pi 5) system to make sure it is not specific to the RPi5-specific build of 26.04.
Many thanks in advance
Nick
As requested by https://askubuntu.com/users/1004020/daniel-t (thank you):
$ dpkg --get-selections | grep gstreamer
gir1.2-gstreamer-1.0:arm64 install
gstreamer1.0-alsa:arm64 install
gstreamer1.0-gl:arm64 install
gstreamer1.0-gtk3:arm64 install
gstreamer1.0-gtk4:arm64 install
gstreamer1.0-libav:arm64 install
gstreamer1.0-packagekit install
gstreamer1.0-pipewire:arm64 install
gstreamer1.0-plugins-bad:arm64 install
gstreamer1.0-plugins-base:arm64 install
gstreamer1.0-plugins-base-apps install
gstreamer1.0-plugins-extra:arm64 install
gstreamer1.0-plugins-good:arm64 install
gstreamer1.0-plugins-ugly:arm64 install
gstreamer1.0-tools install
gstreamer1.0-x:arm64 install
libgstreamer-gl1.0-0:arm64 install
libgstreamer-plugins-bad1.0-0:arm64 install
libgstreamer-plugins-base1.0-0:arm64 install
libgstreamer-plugins-extra1.0-0:arm64 install
libgstreamer1.0-0:arm64 install
In case it helps, these are the errors from opening two different .mkv files in Showtime video player (Gstreamer-based):
Error from element /GstPlayBin3:playbin3/GstURIDecodeBin3:uridecodebin3/GstDecodebin3:decodebin3-0/v4l2slh265dec:v4l2slh265dec0: GStreamer error: negotiation problem.
Unsupported pixel format
../sys/v4l2codecs/gstv4l2codech265dec.c(460): gst_v4l2_codec_h265_dec_negotiate (): /GstPlayBin3:playbin3/GstURIDecodeBin3:uridecodebin3/GstDecodebin3:decodebin3-0/v4l2slh265dec:v4l2slh265dec0:
No support for 3840x2160 format UNKNOWN
Error from element /GstPlayBin3:playbin3/GstURIDecodeBin3:uridecodebin3/GstDecodebin3:decodebin3-0/v4l2slh265dec:v4l2slh265dec0: Could not get/set settings from/on resource.
Failed to configure the buffer pool
../gst-libs/gst/video/gstvideodecoder.c(4373): gst_video_decoder_decide_allocation_default (): /GstPlayBin3:playbin3/GstURIDecodeBin3:uridecodebin3/GstDecodebin3:decodebin3-0/v4l2slh265dec:v4l2slh265dec0:
Configuration is most likely invalid, please report this issue.
Output of ffmpeg:
Input #0, matroska,webm, from 'test video 1080p.mkv':
Metadata:
creation_time : 2026-04-27T14:41:20.000000Z
ENCODER : Lavf62.3.100
Duration: 01:41:46.75, start: -0.021000, bitrate: 2017 kb/s
Stream #0:0: Video: hevc (Main), 1 reference frame, yuv420p(tv, bt709, left), 1918x1040 [SAR 1:1 DAR 959:520], 23.98 fps, 23.98 tbr, 1k tbn (default)
Metadata:
DURATION : 01:41:39.719000000
Stream #0:1(eng): Audio: aac (LC), 48000 Hz, 5.1, fltp, delay 1024, start -0.021000 (default)
Metadata:
title : AAC 5.1 320kbs
DURATION : 01:41:46.752000000
Stream #0:2(eng): Subtitle: subrip (srt), start -0.021000
Metadata:
title : English
DURATION : 01:34:33.417000000
[out#0/null @ 0xaaaad3d17ba0] No explicit maps, mapping streams automatically...
[vost#0:0/wrapped_avframe @ 0xaaaad3df5840] Created video stream from input stream 0:0
Device creation failed: -14.
[vist#0:0/hevc @ 0xaaaad3df53e0] [dec:hevc @ 0xaaaad3dfe320] No device available for decoder: device type drm needed for codec hevc.
[vist#0:0/hevc @ 0xaaaad3df53e0] [dec:hevc @ 0xaaaad3dfe320] Hardware device setup failed for decoder: Bad address
Error opening output file -.
Error opening output files: Bad address
[AVIOContext @ 0xaaaad3d18f50] Statistics: 32768 bytes read, 0 seeks
Exiting with exit code -14
Output from dmesg:
$ sudo dmesg | grep hevc ; for codec in H264 H265 MPG2 WVC1 MPG4 MJPG WMV9 ; do echo -e "$codec:\t$(vcgencmd codec_enabled $codec)" ; done ; vcgencmd get_mem arm ; vcgencmd get_mem gpu ; vcgencmd get_config int
[ 5.409842] rpi-hevc-dec 1000800000.codec: Device registered as /dev/video19
H264: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
H265: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
MPG2: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
WVC1: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
MPG4: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
MJPG: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
WMV9: Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
Latest results using H265 mkv:
Input #0, matroska,webm, from 'video-h265.mkv':
Metadata:
ENCODER : Lavf55.12.0
Duration: 00:00:16.16, start: 0.099000, bitrate: 2619 kb/s
Stream #0:0: Video: hevc (Main), 1 reference frame, yuv420p(tv, bt709, left), 1920x960 [SAR 1:1 DAR 2:1], 25 fps, 25 tbr, 1k tbn, start 0.120000 (default)
Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp, start 0.099000 (default)
Metadata:
title : Stereo
LANGUAGE : eng
[out#0/null @ 0xaaaaf4dceb20] No explicit maps, mapping streams automatically...
[vost#0:0/wrapped_avframe @ 0xaaaaf4e01790] Created video stream from input stream 0:0
Device creation failed: -14.
[vist#0:0/hevc @ 0xaaaaf4dfd030] [dec:hevc @ 0xaaaaf4e02570] No device available for decoder: device type drm needed for codec hevc.
[vist#0:0/hevc @ 0xaaaaf4dfd030] [dec:hevc @ 0xaaaaf4e02570] Hardware device setup failed for decoder: Bad address
Error opening output file -.
Error opening output files: Bad address
[AVIOContext @ 0xaaaaf4dd2ed0] Statistics: 182748 bytes read, 0 seeks
Exiting with exit code -14
nicholas@nostromo:~/Downloads$ sudo vcgencmd get_mem gpu
gpu=8M
nicholas@nostromo:~/Downloads$ sudo vcgencmd get_config int
arm_64bit=1
arm_freq=2400
arm_freq_min=1500
arm_peri_high=1
audio_pwm_mode=2
avs_temp=19144
camera_auto_detect=1
core_freq=910
core_freq_min=500
disable_commandline_tags=2
disable_fw_kms_setup=1
disable_l2cache=1
disable_overscan=1
display_auto_detect=1
display_default_lcd=-1
display_hdmi_rotate=-1
display_lcd_rotate=-1
dvfs=4
enable_gic=1
force_eeprom_read=1
force_ethernet_phy_address=-1
force_pwm_open=1
framebuffer_depth=16
framebuffer_ignore_alpha=1
framebuffer_swap=1
gpu_freq_min=500
hdmi_enable_4kp60=1
hevc_freq=910
hevc_freq_min=500
ignore_lcd=-1
init_uart_clock=0x2dc6c00
initial_turbo=60
isp_freq=910
isp_freq_min=500
mask_gpu_interrupt1=16418
max_framebuffers=1
over_voltage_avs=0x1b8a0
pause_burst_frames=1
pciex4_reset=1
pmic_turbo_threshold=1500
power_force_3v3_pwm=1
program_serial_random=1
ramfsaddr=-1
total_mem=16384
usb_max_current_enable=1
v3d_freq=960
v3d_freq_min=500
vpred=8728
vpred_max=8728
hdmi_force_cec_address:0=65535
hdmi_force_cec_address:1=65535
Two days ago I ran “apt upgrade” on a Ubuntu 24.04 machine to get a kernel update, and as usual a reboot was suggested. However, the machine (in a data center far away) did not come back up, and using a remote console I found out that GRUB seems to have some kind of issue:
GNU GRUB version 2.12
Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists possible
device or file completions. To enable less(1)-like paging, "set
pager=1". ESC exits at any time.
grub> set pager=1
grub> lsmod
error: unknown filesystem
grub> ls
error: unknown filesystem
grub> lspci
error: unknown filesystem
grub> _
How did an “apt upgrade” get my GRUB into a state where it cannot even perform an “ls?” And more important, how do I get GRUB out of that state?
(This question clearly differs from Grub rescue - error: unknown filesystem, in that whatever is going on in this question can obviously not be solved by running “ls” because, as shown above, only an error message is displayed, as reaction to many basic GRUB commands, except set, insmod, and recordfail. I’ve tried recreating the steps that grub.cfg lists for the default “Ubuntu” menu entry, but everything that’s not an insmod gets met with “error: unknown filesystem”. I’m not sure how to proceed from here.)
This answer recommends using GRUB’s auto-completion to list stuff, and I can indeed get GRUB to list partitions of the installed disks:
grub> ls (hd0,
Possible partitions are:
Partition hd0,gpt1: No known filesystem detected - Partition start at 2048KiB - Total size 33554432KiB
Partition hd0,gpt2: No known filesystem detected - Partition start at 33556480KiB - Total size 1048576KiB
Partition hd0,gpt3: No known filesystem detected - Partition start at 34605056KiB - Total size 2111832064KiB
Partition hd0,gpt4: No known filesystem detected - Partition start at 2146437120KiB - Total size 1760581447.5KiB
Partition hd0,gpt5: No known filesystem detected - Partition start at 1024KiB - Total size 1024KiB
grub> ls (hd0,gpt
The ext2 module has been inserted (insmod ext2 did not show an error), but GRUB still does not recognize the filesystems on any of the partitions, and at least three of them it should recognize! the device it is supposed to read its configuration from!hd0,2 is /boot, which is ext3 (I think?), and hd0,3 and hd0,4 are / and /home, respectively, which are also ext3 or ext4. (I honestly don’t care, as it should be irrelevant here. Relevant is that GRUB should be able to recognize the filesystems, as GRUB can handle all of them.) Just as before, running the actual ls command results in “error: unknown filesystem”
Okay, more details: there’s two identically-sized disks, 5 partitions each, and four of those are RAID-1’ed into four md devices, 0 to 3 (swap, /boot, /, /home). (Fifth is “BIOS boot” for GRUB’s second stage loader.)
The grub.cfg contains the following lines:
set root='mduuid/c35208cb3d5eb477ed4dad145decf0cb'
search --no-floppy --fs-uuid --set=root d6db4f8c-c03a-4948-b07f-52116b495cf2
The first ID corresponds to an MD device, ls /dev/disk/by-id:
lrwxrwxrwx 1 root root 9 May 1 20:08 md-uuid-c35208cb:3d5eb477:ed4dad14:5decf0cb -> ../../md1
The second ID corresponds to the filesystem inside the device, according to blkid:
/dev/md1: UUID="d6db4f8c-c03a-4948-b07f-52116b495cf2" BLOCK_SIZE="4096" TYPE="ext3"
(These results were obtained from a rescue system running on the machine.)
Now, on the GRUB shell, I can see the following:
grub> ls (mduuid/c35208cb3d5eb477ed4dad145decf0cb)/
error: unknown filesystem
grub> ls (mduuid/a404642c5311376de00e5317dbd699bd)/
lost+found/ boot/ home/ sys/ tmp/ srv/ media/ usr/ root/ lib64 [abbreviated because I don’t want to type it all]
grub> ls (md/2)/
lost+found/ boot/ home/ sys/ tmp/ srv/ media/ usr/ root/ lib64 [same as above]
grub> ls (md/1)/
error: unknown filesystem
Clearly GRUB has not completely forgotten how to read filesystems, it can show the contents of md/2 (which is /) without any issues, but for some reason md/1 is a problem. I can boot into the rescue system and mount the device md/1 without any problems. fsck.ext3 reports zero problems, even when forcing the check.
Also, as requested, I tried to find out what $root and $prefix are set to, and grub cuts off the output.
grub> $root
error: can't find command 'mduuid/c35208cb3d5eb'.
grub> $prefix
error: can't find command '(mduuid/c35208cb3d5e'.
I am also 99% confident that EFI is not a factor here; when putting the disks into a QEMU (a service offered by the DC operator), the system actually boots up, and running efibootmgr basically refuses to do anything, as if the system was not booted via EFI.
I didn't have Remmina installed previously. It isn't in the snap list and when I run the Ubuntu software app and search Remmina, it doesn't recognize that it's already installed so I can't remove it. Is this app required for updating or support? I uninstalled from the command line but I'm wondering why the Ubuntu software doesn't recognize it and how it got there in the first place. There were several files and folders listed in different directories related to remmina. Now there are two empty folders - org.remmina.Remmina and remmina - in my .cache. Best way to remove them?
In response to the comments about 20 to 22 upgrade below: This laptop previously was partitioned previously with Win7 and Ubuntu 22 on it. When I tried to upgrade it to 24, I had all kinds of problems. I formatted this drive to eliminate the Win7 partition but attempts to install any OS using a USB failed. I had to go back to my original 18.04 dvd to install and do subsequent upgrades to get it back to 22. (I bought a new laptop for 24.04.) Remmina showed up in the installed apps. When I searched that in the App Center, there was no prompt to uninstall or upgrade the existing. Instead there was a prompt to install. Before my attempt to upgrade to 24, I updated the 22 to make sure I had the latest updates. I suppose that could have installed the Remmina then and I just didn't see it. This version is 22.04.5 but I could have been on 22.04.4 before the upgrade.
Any ideas why this tab is constantly crashing ? https://www.icloud.com/mail/
I maintain various tabs with my email addresses open so I can check for emails. They are stable, but the address above keeps crashing.
Ubuntu version 24.04.4 LTS
I'm a beginner. I'm using a Galaxy Book2 Pro 5G with Ubuntu 26.04 LTS installed. The known problem is that there's no sound from the speakers, but there is sound when I plug in headphones. There's very little information about this online. If anyone knows a solution, could you please share it? Thank you very much!
For many years I have used luit to convert local encodings to UTF-8.
luit --encoding XXX cat mywierdfile.txt
It was in the x11-tools package for previous releases of Ubuntu. It is no longer in this package in 24.04LTS. Is there a reason it wasn't included? Is there an alternative? I've seen this answer (Using packages from a previous release) but I'm curious as to why it was left out of noble.
I am on Ubuntu 22.04.4 LTS. On HP ZBook Power 16 inch G11 Mobile Workstation PC. It contains Nvidia RTX 2000 Ada Generation Laptop GPU. I am having trouble installing its driver. I downloaded driver version 550.90.07. Below are all supported versions for this GPU (link):
I first installed gcc-13 and then executed the downloaded driver file NVIDIA-Linux-x86_64-550.90.07.run. It executed successfully and showed the GPU information when I run nvidia-smi command. But when I restarted the PC, it showed just the blinking cursor. I switched to tty2 (Ctrl+Alt+F2) and then rerun the downloaded driver file from the tty2, though it is almost instantaneous and does not take much time. It gave me back GUI. But now I have to repeat the same process during each boot. How can I fix this so that I dont have to repeat on each boot?
Another thing that is not working is that this machine is not at all detecting external monitor. I tried both before and after nvidia driver installation. But its simply not working. How do I fix it?
PS
Some more observations:
$ sudo lshw -C video
[sudo] password for perception3:
*-display
description: 3D controller
product: NVIDIA Corporation
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: iomemory:400-3ff iomemory:420-41f irq:209 memory:8c000000-8cffffff memory:4000000000-41ffffffff memory:4200000000-4201ffffff ioport:3000(size=128)
*-display UNCLAIMED
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 08
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list
configuration: latency=0
resources: iomemory:520-51f iomemory:420-41f memory:5228000000-5228ffffff memory:4210000000-421fffffff memory:c0000-dffff memory:4202000000-4208ffffff
*-graphics
product: EFI VGA
physical id: 2
logical name: /dev/fb0
capabilities: fb
configuration: depth=32 resolution=1920,1200
Also, it says llvmpipe in graphics information:
Also, I am unable to change screen brightness.
One more thing to add: I tried to determine ubuntu recommended driver as follows:
$ ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd000028B8sv0000103Csd00008CA3bc03sc02i00
vendor : NVIDIA Corporation
manual_install: True
driver : nvidia-driver-545-open - distro non-free
driver : nvidia-driver-535-open - distro non-free
driver : nvidia-driver-545 - distro non-free
driver : nvidia-driver-535 - distro non-free recommended
driver : nvidia-driver-535-server - distro non-free
driver : nvidia-driver-535-server-open - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
In above output v535 seems to be recommended one. Also I tried following command as suggested by Hannu, to determine the driver:
$ ubuntu-drivers list 2>/dev/null | grep --color=none nvidia
nvidia-driver-545, (kernel modules provided by nvidia-dkms-545)
nvidia-driver-535-open, (kernel modules provided by linux-modules-nvidia-535-open-generic-hwe-22.04)
nvidia-driver-535-server-open, (kernel modules provided by linux-modules-nvidia-535-server-open-generic-hwe-22.04)
nvidia-driver-535, (kernel modules provided by linux-modules-nvidia-535-generic-hwe-22.04)
nvidia-driver-535-server, (kernel modules provided by linux-modules-nvidia-535-server-generic-hwe-22.04)
nvidia-driver-545-open, (kernel modules provided by nvidia-dkms-545-open)
Finally, I ended up installing first driver (v535 with suffix "tested") from additional drivers panel:
Above screenshot was taken before my current driver installation using *.run file. I had fresh Ubuntu installation and then installed from this Additional Drivers panel. It gave me just the blinking cursor after boot. No UI. I was not even able to switch to tty with Ctrl+Alt+Fn keys. So I reformatted, installed fresh ubuntu and then installed driver using *.run file.
I apt-get removed default CMake and build CMake from source and installed the new version into /usr/local . But the cmake comannd does not works.
I've tried following commands:
$ source ~/.bashrc
$ sudo ldconfig
$ which cmake
/usr/local/bin/cmake
$ /usr/local/bin/cmake --version
cmake version 3.18.4
$ cmake --version
-bash: /usr/bin/cmake: No such file or directory
I can create a soft link /usr/bin/cmake to /usr/local/bin/cmake , but I'm curious about why the cmake command obstinately point to the former?
Additional Information:
$ dpkg -l | grep cmake
rc cmake-data 3.10.2-1ubuntu2.18.04.1 all CMake data files (modules, templates and documentation)
$ apt-cache policy cmake
cmake:
Installed: (none)
Candidate: 3.10.2-1ubuntu2.18.04.1
Version table:
3.10.2-1ubuntu2.18.04.1 500
500 http://[INTRANET]/ubuntu bionic-updates/main amd64 Packages
3.10.2-1ubuntu2 500
500 http://[INTRANET]/ubuntu bionic/main amd64 Packages
which [INTRANET] is a private source of a company.
I've a problem installing coriander.
The error says it can't find ltinfo and I've tried most of the suggested ways in the other threads none seems to work that if I executed them correctly.
Am I missing some libraries?
I'm fairly new to the linux stuff.
I'm using a fresh copy of Ubuntu 18.0.4 LTS
Trying to register a service in /etc/init.d, but cannot get it to run with service myservice start and at boot-up
Executable file:
#!/bin/sh
# kFreeBSD do not accept scripts as interpreters, using #!/bin/sh and sourcing.
if [ true != "$INIT_D_SCRIPT_SOURCED" ] ; then
set "$0" "$@"; INIT_D_SCRIPT_SOURCED=true . /lib/init/init-d-script
fi
### BEGIN INIT INFO
# Provides: skeleton
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Example initscript
# Description: This file should be used to construct scripts to be
# placed in /etc/init.d. This example start a
# single forking daemon capable of writing a pid
# file. To get other behavoirs, implemend
# do_start(), do_stop() or other functions to
# override the defaults in /lib/init/init-d-script.
### END INIT INFO
# Author: Foo Bar <foobar@baz.org>
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.
DESC="bel radio recording"
DAEMON=/usr/bin/streamripper
case "$1" in
start) log_daemon_msg "Starting bel radio recording" "streamripper"
sudo -u ubuntu /usr/bin/streamripper http://184.154.58.146:29378/ch18_56.mp3 --quiet -s -a -d ~ &
;;
stop) log_daemon_msg "Stopping bel radio recording" "streamripper"
pkill streamripper
RETVAL=0
log_end_msg $RETVAL
;;
restart) log_daemon_msg "Restarting bel radio recording" "streamripper"
$0 stop
$0 start
;;
*)
esac
exit 0
Trying to register this with
sudo update-rc.d recordbyradio defaults
and the command returns silently no matter how many times I run it
then
sudo service recordbyradio start
also returns silently and doesn't start anything.
/etc/init.d/recordbyradio start
works fine however
Ubuntu version (running in EC2):
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial
How can I list all enabled services from systemctl?
I know running systemctl command by itself lists all services, but I would like to only get the enabled ones.
I'm using Ubuntu 14.04. I recently installed Android Studio, but whenever I try to run a Hello World app, I get this error:
/home/praveen/Android/Sdk/tools/emulator -avd Nexus_6_API_21 -netspeed full -netdelay none
emulator: ERROR: x86 emulation currently requires hardware acceleration!
Please ensure KVM is properly installed and usable.
CPU acceleration status: KVM is not installed on this machine (/dev/kvm is missing).
I have a virtually hosted ubuntu server 12.04 on which I installed Unity desktop. It all works fine except the only keyboard option I have is "US". This could be due to the fact that ubuntu server was installed with US keyboard (by the virtual machine provider).
I want the keyboard layout to be Canadian-French. I cannot change the keyboard layout from the GUI/Desktop see pic.
I have the feeling I need to install new layouts, perhaps using apt-get something! (noob)
SO the questions could be how to add new layouts? (I have root btw)
I need a good CAD program for mechanical engineering.
Are there any good 3D CAD programs available for Ubuntu like Autocad?
I use Torrents often, so I need to know how to make my computer start up and shut down automatically, Wi-Fi is switched on at six in the morning in my hotel and switched off at two AM. (I am able to schedule torrents, that's not a problem), I don't want my computer always plugged in to a power supply.