Philippe Coval, in order to allow additional upstream mainline kernel 
developers to examine the issue, at your earliest convenience, could you please 
test the latest mainline kernel? Please keep in mind the following:
1) The one to test is in a folder at the very top of the page (not the daily 
folder).
2) The release names are irrelevant.
3) The folder time stamps aren't indicative of when the kernel actually was 
released upstream.
4) Install instructions are available at 
https://wiki.ubuntu.com/Kernel/MainlineBuilds .

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't 
boot into the OS) please make a comment in your report about this, and continue 
to test the next most recent kernel version until you can test to the issue. 
Once you've tested the mainline kernel, please comment on which kernel version 
specifically you tested. If this issue is not reproducible in the mainline 
kernel, please add the following tags by clicking on the yellow circle with a 
black pencil icon, next to the word Tags, located at the bottom of the Bug 
Description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is
the release candidate number if it exists.

If the issue is reproducible with the mainline kernel, please add the following 
tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.

Also, you don't need to apport-collect further unless specifically
requested to do so.

In addition, to keep this issue relevant to upstream, please continue to
test the latest mainline kernel as it becomes available.

Lastly, it is most helpful that after testing of the latest mainline
kernel is complete, you mark this report Status Confirmed.

Thank you for your help.

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1900854

Title:
  radeon:  GPU lockup when restarting a video on RV730

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I suspect there is an issue with radeon driver for video acceleration,
  I haven't investigated yet but I would investigate resources releases of VPU 
driver.

  
  As suggested on other (obsolete) bug:

  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574130?comments=all

  
  I thought it was a VLC bug but actually it's also replicated using mpv:

  Just run

  mpv
  
https://conf.tube/download/videos/ea60f030-90c1-4e8e-9782-bef14dd3b1d1-1080.mp4

  It appears to work as expected

  Stop with Esc

  and run again

  Process will be stuck on creating window frame 
  and then once windows is starting to show the video,
  desktop's frame buffer will become garbage:

  video's first frame looks like blicking in this triangle mess.

  
  system is still usable,
  audio is still playing.

  I logged using ssh and reported details using:

  ubuntu-bug linux

  
  I hope collected data is not mixed with my client's host.

  I can give more details or test patches.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: linux-image-5.8.0-25-generic 5.8.0-25.26
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDmesg:
   Error: command ['pkexec', 'dmesg'] failed with exit code 127: 
polkit-agent-helper-1: error response to PolicyKit daemon: 
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
   Error executing command as another user: Not authorized
   
   This incident has been reported.
  Date: Wed Oct 21 16:02:27 2020
  IwConfig:
   lo        no wireless extensions.
   
   enp2s0    no wireless extensions.
   
   docker0   no wireless extensions.
  MachineType: Dell Inc. Precision T1500
  ProcEnviron:
   TERM=screen.xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-25-generic 
root=UUID=036d3d8c-98d4-48ec-a18b-dce21dcf0bb5 ro initrd=initrd.gz splash quiet 
vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.8.0-25-generic N/A
   linux-backports-modules-5.8.0-25-generic  N/A
   linux-firmware                            1.190
  RfKill:
   0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to groovy on 2020-10-13 (8 days ago)
  acpidump:
   Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed 
with exit code 127: polkit-agent-helper-1: pam_authenticate failed: 
Authentication failure
   Error executing command as another user: Not authorized
   
   This incident has been reported.
  dmi.bios.date: 01/13/2011
  dmi.bios.release: 8.15
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.4.0
  dmi.board.name: 0XC7MM
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr2.4.0:bd01/13/2011:br8.15:svnDellInc.:pnPrecisionT1500:pvr00:rvnDellInc.:rn0XC7MM:rvrA00:cvnDellInc.:ct3:cvr:
  dmi.product.family: 0
  dmi.product.name: Precision T1500
  dmi.product.sku: 0
  dmi.product.version: 00
  dmi.sys.vendor: Dell Inc.

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