[595.71.05 open] CPU soft lockup in nvDIFRPrefetchSurfaces on S3 resume — Blackwell mobile (10de:2c59), kernel 6.17

NVIDIA Open GPU Kernel Modules Version

595.71.05

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

Ubuntu 24.04.4 LTS

Kernel Release

uname -a Linux christian-Legion-Pro-7-16IAX10H 6.17.0-35-generic #35~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue May 26 19:30:42 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

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 open kernel module 595.71.05

Describe the bug

On resume from S3 suspend, a nvidia-modeset kthread soft-locks one CPU indefinitely inside the DIFR prefetch path (nvDIFRPrefetchSurfaces / DifrPrefetchEventDeferredWork); the display never recovers and the machine must be hard-powered-off.
Reproduces across multiple suspend cycles. Full trace and nvidia-bug-report.log attached.

To Reproduce

Suspend the machine and resume.

Bug Incidence

Always

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

More Info

No response

Start by reproducing an S3 suspend/resume cycle on the listed Blackwell mobile GPU and inspect the attached trace and nvidia-bug-report.log.gz. Trace the nvidia-modeset kthread through nvDIFRPrefetchSurfaces and DifrPrefetchEventDeferredWork in the open kernel module sources. Done means resume completes without a CPU soft lockup and the display recovers across repeated cycles.