Since one of the latest updates, system doesn’t sleep or hibernate (with a Nvidia graphics card).
What I can find in the systemd log:
Nov 10 11:00:06 Prec5550 kernel: NVRM: GPU 0000:01:00.0: PreserveVideoMemoryAllocations module parameter is set. System Power Management attempted without driver procfs suspend interface. Please refer to the 'Configuring Power Management Support' section in the driver README.
This error message comes up twice, then the computer wakes up again.
I get some babbling of the driver directly after the error:
Nov 10 11:00:05 Prec5550 kernel: nvidia 0000:01:00.0: PM: pci_pm_suspend(): nv_pmops_suspend [nvidia] returns -5
Nov 10 11:00:05 Prec5550 kernel: nvidia 0000:01:00.0: PM: dpm_run_callback(): pci_pm_suspend returns -5
Nov 10 11:00:05 Prec5550 kernel: nvidia 0000:01:00.0: PM: failed to suspend async: error -5
Nov 10 11:00:05 Prec5550 kernel: PM: Some devices failed to suspend, or early wake event detected
and finally, systemd-sleep comments with:
Nov 10 11:00:06 Prec5550 systemd-sleep[17205]: Failed to put system to sleep. System resumed again: Input/output error
Nov 10 11:00:06 Prec5550 kernel: PM: suspend exit
Any ideas how to fix this? The sleep/hibernate issue occurs on several systems with Nvidia graphics.