Constant GPU load around 13%/14% when connected second monitor / 460.32.03 / GT 710

Graphics / Linux Linux
1

Hi, when I connect my second monitor with rotated (XY inverted) screen, the “idle” GPU load jumps to about 14% and there is a little bit of CPU usage. Tested also with multiple Xorg “Screens” / Xinerama, nothing helps.

System: Linux 5.8.14 x86_64 (Xubuntu), X Server 1.20.9.

Regards,
KK

2

Timidly bumping the thread… Anyone?

3

Do you have xfwm compositing enabled or are you using forcecomposition pipeline?

4

Yes, I do use xfwm compositing. I don’t use forcecomposition pipeline.

5

The xfwm compositor doesn’t really work with the nvidia driver, though I don’t know if this is the reason for the constant gpu load. Please try disabling it for testing.

6

Well, I think it works quite well with nvidia driver to be honest :). Anyway disabling composition didn’t change anything still about 13/14 % load.

7

You’re the first one to say that, normally it goes like this:
https://forums.developer.nvidia.com/t/440-drivers-super-choppy-kill-video-memory-1080ti/149459?u=generix
https://forums.developer.nvidia.com/t/lots-of-stuttering-and-frame-delays-on-rtx-2060-mobile/71225?u=generix

Doesn’t matter since it’s obviously not the reason in your case.
Thinking a bit over it, I guess it’s a variant of a known bug in the nvidia driver (don’t know if that had been fixed meanwhile and returned or just never stopped)
https://forums.developer.nvidia.com/t/idle-power-usage-problem-gtx-1060-6gb/58250/8
While you’re not explicitly forcing the composition pipeline, rotating a monitor does implicitly.
(NB: I guess the mentioned compat option is long gone.)

8

It seems that that’s exactly it. When the screen is not rotated the usage is 0%.

Does anyone know what is the status of this bug?

9

Good question, I didn’t hear about it for quite some time, so I really don’t know if that was ever fixed or not.

10

Hello,

I am having the same issue on a fresh installation of Ubuntu 24.04 with nvidia driver version 550.90.07, CUDA version 12.4, and a GeForce RTX 4080 super. Was there ever a solution found for this? My GPU usage is hovering at 20-30% when it should be idling. Setting all monitors to landscape fixes the issue, but having any of them portrait or even ‘Landscape (flipped)’ brings it back.

Thanks

11

Just nudging this again, any status updates?