Ubuntu
nvidia-prime package

  1. Bionic (18.04)
  2. Bug #1778011
  3. Comment #125

Comment 125 for bug 1778011

Revision history for this message
Dan Robinson (dlrobinson) wrote :

@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.