Public bug reported:
since upgrading to noble, sometimes the following bit of code works
instantaneously, and sometimes it takes ~5 seconds to report:
** (gst-plugin-scanner:692358): CRITICAL **: 10:55:31.508:
_dma_fmt_to_dma_drm_fmts: assertion 'fmt != GST_VIDEO_FORMAT_UNKNOWN'
failed
code:
>>> import cv2
>>> vc = cv2.VideoCapture('/dev/video2')
when it takes a long time and reports the assertion error, I see the
following in journalctl logs (so maybe an amd/kernel bug instead of an
opencv bug? -- also fwiw am on a hybrid amd/intel system where
DRI_PRIME=1 generally activates the amd card but this should be running
w/out DRI_PRIME set):
Jul 01 10:55:29 taplop kernel: [drm] scheduler comp_1.2.1 is not ready, skipping
Jul 01 10:55:29 taplop kernel: [drm] PCIE GART of 256M enabled (table at
0x000000F400000000).
Jul 01 10:55:30 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.1.0 test failed
(-110)
Jul 01 10:55:30 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.2.0 test failed
(-110)
Jul 01 10:55:30 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.3.0 test failed
(-110)
Jul 01 10:55:30 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.0.1 test failed
(-110)
Jul 01 10:55:30 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.1.1 test failed
(-110)
Jul 01 10:55:31 taplop kernel: amdgpu 0000:01:00.0:
[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring comp_1.2.1 test failed
(-110)
Jul 01 10:55:31 taplop kernel: [drm] UVD and UVD ENC initialized successfully.
Jul 01 10:55:31 taplop kernel: [drm] VCE initialized successfully.
Jul 01 10:55:31 taplop kernel: [drm] scheduler comp_1.1.0 is not ready, skipping
Jul 01 10:55:31 taplop kernel: [drm] scheduler comp_1.2.0 is not ready, skipping
Jul 01 10:55:31 taplop kernel: [drm] scheduler comp_1.3.0 is not ready, skipping
Jul 01 10:55:31 taplop kernel: [drm] scheduler comp_1.0.1 is not ready, skipping
<<< not ready skipping lines repeat a whole bunch of times >>>
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: python3-opencv 4.6.0+dfsg-13.1ubuntu1
ProcVersionSignature: Ubuntu 6.8.0-35.35-generic 6.8.4
Uname: Linux 6.8.0-35-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
Date: Mon Jul 1 10:59:12 2024
InstallationDate: Installed on 2019-08-17 (1781 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190305.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: opencv
UpgradeStatus: Upgraded to noble on 2024-03-23 (100 days ago)
** Affects: opencv (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2071644
Title:
sometimes takes ~5 seconds to _dma_fmt_to_dma_drm_fmts: assertion 'fmt
!= GST_VIDEO_FORMAT_UNKNOWN' failed
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