Comment 0 for bug 1900854

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.