Kiwi Linux
nvidia-prime package

  1. Bug #1765363
  2. Comment #72

Comment 72 for bug 1765363

Revision history for this message
Richard Veale (richard-e-veale) wrote :

@vasyl: I want to add to your comment.

I am in 20.04 now but until last week was using 18.04 with the same problem. If you use the method you reported (activate runtime PM for nvidia chip) power usage is still higher than if the chip is powered off totally using bbswitch.

Runtime PM enabled, PRIME @ intel mode: 7.5~8.5 W power usage
bbswitch nvidia off method, PRIME @ intel mode: 6.0~7.0 W power usage

I think that maybe the PM method puts the nvidia chip in a "low power" mode (maybe level 8? level 12?) which does reduce power draw but still keeps it at 1 or 2 watts. Whereas switching it off entirely makes power draw minimal.

This is just based on a few days of realtime observations on my part, however.