[Bug 2084883] [NEW] Video playback on AMD 780m crashes system

Public bug reported:

During video playback on Youtube/Firefox, screen turns off for several seconds then comes back up. It usually happens 2-3 times and then it stays black. Video seems to be running in background (i still hear audio) during screen resets, however I mouse and keyboard are unresponsible. Alt-sysrq-o successfully shuts down the machine.
I am using KWin (current git version).
The bug does not happen every time, but about once a day. It never happened on 24.04 with 6.8 kernel.

Attached is journalctl --system output showing kernel errors related
amdgpu/VCN problems.

ProblemType: Bug
DistroRelease: Ubuntu 24.10
Package: linux-image-6.11.0-8-generic 6.11.0-8.8
ProcVersionSignature: Ubuntu 6.11.0-8.8-generic 6.11.0
Uname: Linux 6.11.0-8-generic x86_64
ApportVersion: 2.30.0-0ubuntu4
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Fri Oct 18 10:11:55 2024
InstallationDate: Installed on 2024-08-07 (71 days ago)
InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240425.1)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: LENOVO 21K9CTO1WW
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-8-generic root=/dev/mapper/luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 ro quiet cryptdevice=UUID=2a2c7241-509d-4e78-9ff2-b7c3faa639f6:luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 root=/dev/mapper/luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 splash rcu_nocbs=all rcutree.enable_rcu_lazy=1 vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.11.0-8-generic N/A
linux-backports-modules-6.11.0-8-generic N/A
linux-firmware 20240913.gita34e7a5f-0ubuntu2
SourcePackage: linux
UpgradeStatus: Upgraded to oracular on 2024-10-13 (5 days ago)
dmi.bios.date: 09/05/2024
dmi.bios.release: 1.39
dmi.bios.vendor: LENOVO
dmi.bios.version: R2FET59W (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21K9CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.30
dmi.modalias: dmi:bvnLENOVO:bvrR2FET59W(1.39):bd09/05/2024:br1.39:efr1.30:svnLENOVO:pn21K9CTO1WW:pvrThinkPadP16sGen2:rvnLENOVO:rn21K9CTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21K9_BU_Think_FM_ThinkPadP16sGen2:
dmi.product.family: ThinkPad P16s Gen 2
dmi.product.name: 21K9CTO1WW
dmi.product.sku: LENOVO_MT_21K9_BU_Think_FM_ThinkPad P16s Gen 2
dmi.product.version: ThinkPad P16s Gen 2
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New


** Tags: amd64 apport-bug oracular wayland-session

** Attachment added: "Journalctl log of kernel errors"
https://bugs.launchpad.net/bugs/2084883/+attachment/5829383/+files/bug.txt

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https://bugs.launchpad.net/bugs/2084883

Title:
Video playback on AMD 780m crashes system

Status in linux package in Ubuntu:
New

Bug description:
During video playback on Youtube/Firefox, screen turns off for several seconds then comes back up. It usually happens 2-3 times and then it stays black. Video seems to be running in background (i still hear audio) during screen resets, however I mouse and keyboard are unresponsible. Alt-sysrq-o successfully shuts down the machine.
I am using KWin (current git version).
The bug does not happen every time, but about once a day. It never happened on 24.04 with 6.8 kernel.

Attached is journalctl --system output showing kernel errors related
amdgpu/VCN problems.

ProblemType: Bug
DistroRelease: Ubuntu 24.10
Package: linux-image-6.11.0-8-generic 6.11.0-8.8
ProcVersionSignature: Ubuntu 6.11.0-8.8-generic 6.11.0
Uname: Linux 6.11.0-8-generic x86_64
ApportVersion: 2.30.0-0ubuntu4
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Fri Oct 18 10:11:55 2024
InstallationDate: Installed on 2024-08-07 (71 days ago)
InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240425.1)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: LENOVO 21K9CTO1WW
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-8-generic root=/dev/mapper/luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 ro quiet cryptdevice=UUID=2a2c7241-509d-4e78-9ff2-b7c3faa639f6:luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 root=/dev/mapper/luks-2a2c7241-509d-4e78-9ff2-b7c3faa639f6 splash rcu_nocbs=all rcutree.enable_rcu_lazy=1 vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.11.0-8-generic N/A
linux-backports-modules-6.11.0-8-generic N/A
linux-firmware 20240913.gita34e7a5f-0ubuntu2
SourcePackage: linux
UpgradeStatus: Upgraded to oracular on 2024-10-13 (5 days ago)
dmi.bios.date: 09/05/2024
dmi.bios.release: 1.39
dmi.bios.vendor: LENOVO
dmi.bios.version: R2FET59W (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21K9CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.30
dmi.modalias: dmi:bvnLENOVO:bvrR2FET59W(1.39):bd09/05/2024:br1.39:efr1.30:svnLENOVO:pn21K9CTO1WW:pvrThinkPadP16sGen2:rvnLENOVO:rn21K9CTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21K9_BU_Think_FM_ThinkPadP16sGen2:
dmi.product.family: ThinkPad P16s Gen 2
dmi.product.name: 21K9CTO1WW
dmi.product.sku: LENOVO_MT_21K9_BU_Think_FM_ThinkPad P16s Gen 2
dmi.product.version: ThinkPad P16s Gen 2
dmi.sys.vendor: LENOVO

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