Score:0

Ubuntu 20.04 - NVIDIA GPU consuming power even when using only integrated graphics card (Intel iGPU)

cl flag

The issue is pretty simple: using Nvidia X Sever Settings GUI to switch from NVIDIA GPU to Intel iGPU doesn't work and the NVIDIA GPU does still consume some power after rebooting and, as a consequence, it generates unnecessary heat. Same thing (obviously) happens if I use prime-select from the terminal. I can see from powertop that when I have everything on idle, I am still consuming around 18-22W which is at least 10W more than I would expect.

This seems to be a rather old bug and supposedly it got "fixed". I can find at least two launchpad bug reports (https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363) and there are some workaround there. Problem is that at this point I am not even sure what works and what doesn't since most posts are over 3 years old. I tried for example installing ubuntu without selecting "install third party drivers" since someone suggested it would fix the problem but it didn't work in my case. Someone else here recently posted about this issue again -> https://discourse.ubuntu.com/t/nvidia-prime-not-powering-off-the-dgpu/21856 I used to have another Optimus laptop years ago and I remember it worked fine in older Ubuntu versions but now something seems wrong.

Config:

  • Zephyrus M16, 11800H, 3070
  • Ubuntu 20.04 (but same problem with 21.10)
  • Nvidia Driver 470 and 460 tested.
Nmath avatar
ng flag
Bug reports are [off-topic](https://askubuntu.com/help/on-topic). It does no good to report them here since the people who work on bugs don't use Ask Ubuntu for that purpose. The best thing you can do is [file a bug report](https://askubuntu.com/q/5121) using the appropriate channels. Even if the bug has already been reported, additional reports help to provide more information and demonstrate that more people are affected with the bug. This can help increase priority/triage of the bug.
Tommy4 avatar
cl flag
@Nmath The thing is I am not 100% sure this is a bug, it could be a configuration issue on my side, hard to tell to be honest. But still I think it would be helpful if someone posts a working (even temporary) fix.
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