Ubuntu
linux package

  1. Bug #1803179
  2. Comment #30

Comment 30 for bug 1803179

Revision history for this message
In , peter (peter-linux-kernel-bugs) wrote :

> You said that acpi_osi="!Windows 2015" helped in some cases. I guess the
> other cases (where it doesn't help) are Windows 10 only systems?

Not sure, I did not check if these systems have support for just w10 (and not 7, 8 or 8.1). Some others require acpi_osi=! acpi_osi="Windows 2009" to avoid the problematic code path in the ACPI table.

(In reply to Rafael J. Wysocki from comment #21)
> And what if we simply avoided using ACPI PM with the affected device on
> those systems?

You mean acpi=off? Avoiding runtime pm nouveau would be sufficient but kills battery life. One interesting observation is that turning off the ACPI power resource (via PCIe port PM) or system sleep seems not to trigger the issue. (Compared to using nouveau.) Maybe I'm dreaming, have to retest this just to be sure.

Do you have tips for tracing PCI register activities? (E.g. read/write pm regs)