NVIDIA / NVIDIA/open-gpu-kernel-modules

NVRM: krcWatchdogCallbackVblankRecovery_IMPL: NVRM-RC: RM has detected that 7 Seconds without a Vblank Counter Update on head:D0

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bug
Dominant language
C
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Description

NVIDIA Open GPU Kernel Modules Version

550.78

Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.
  • I confirm that this does not happen with the proprietary driver package.
Operating System and Version

Fedora 40

Kernel Release

6.8.7-300.fc40.x86_64

Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.
  • I am running on a stable kernel release.
Hardware: GPU

NVIDIA GeForce RTX 4070 SUPER

Describe the bug

Kernel messages being spammed by these lines:

[ 6614.717414] NVRM: Xid (PCI:0000:01:00): 16, pid='<unknown>', name=<unknown>, Head 00000003 Count 0000f82a
[ 6614.717420] NVRM: krcWatchdogCallbackVblankRecovery_IMPL: NVRM-RC: RM has detected that 7 Seconds without a Vblank Counter Update on head:D0

After a few iterations of the two, it keeps spamming NVRM: krcWatchdogCallbackVblankRecovery_IMPL [...].

To Reproduce

Just boot the system with the open kernel modules installed.

Bug Incidence

Always

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

More Info

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the attached nvidia-bug-report.log.gz and the repeated Xid 16 and krcWatchdogCallbackVblankRecovery_IMPL messages. Reproduce on Fedora 40 with kernel 6.8.7-300.fc40.x86_64, NVIDIA 550.78 open modules, and an RTX 4070 SUPER; done means identifying and resolving the cause of the recurring messages.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, linux
Domain
computer-graphics, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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