[Bug 1778011] Re: SRU: PRIME Power Saving mode draws too much power

[Dan Robinson]

@Alberto:

Sorry for the lateness of my reply, apparently Launchpad doesn't
automatically subscribe me just because I commented...

Anyway, I am attaching both gpu-manager.log and gpu-manager-switch.log
for when both the Nvidia profile and Intel profiles are selected.

FWIW, I discovered that once I select the Intel profile I can use
bbswitch to shut the card down for full power saving. This behavior
remains constant regardless of whether I have TLP running or not.
Powertop shows the Nvidia card tunable set to "Good" even without TLP
running.

As far as I can tell, the issue seems to be that on my hardware the only
way to shut the card down completely is through a dedicated ACPI message
(i.e., what bbswitch does) rather than "normal" PCIe power management.

Let me know if I need to do anything else, this laptop is not essential
for productivity so if I need to try to break stuff I'm up for that.

** Attachment added: "gpu-manager-logs.tar.xz"
   https://bugs.launchpad.net/hwe-next/+bug/1778011/+attachment/5233964/+files/gpu-manager-logs.tar.xz

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Title:
  SRU: PRIME Power Saving mode draws too much power

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