XNVCtrl failed: XOpenDisplay failed; is $DISPLAY set?

Question

XNVCtrl failed: XOpenDisplay failed; is $DISPLAY set?

florinshen opened this issue 4 years ago · comments

When I run the bin file, one error reported ,I have create the file named 20-nvidia.conf in /usr/share/X11/xorg.conf.d/.
distro: ubuntu 18.04

Florin Shen · Answer 1 · Fri Aug 21 2020 17:27:36 GMT+0800 (China Standard Time)

XNVCtrl failed: XOpenDisplay failed; is $DISPLAY set.

Spyros Stathopoulos · Answer 2 · Fri Aug 21 2020 17:57:01 GMT+0800 (China Standard Time)

Hi! Could you please let me know what's the value of your $DISPLAY (echo $DISPLAY) for your current environment? Please note that you cannot run the program as system daemon; it can only be started after the current user session has been brought up.

Spyros Stathopoulos · Answer 3 · Mon Dec 21 2020 17:44:53 GMT+0800 (China Standard Time)

Closed due to inactivity and insufficient information. Please reopen if necessary.

Recolic · Answer 4 · Fri Mar 12 2021 17:43:53 GMT+0800 (China Standard Time)

Hi, why we need a DISPLAY to adjust the GPU fan speed...
Most linux GPU server have no display at all. It's not a good experience to plug a monitor manually for servers one by one....

Spyros Stathopoulos · Answer 5 · Fri Mar 12 2021 17:52:58 GMT+0800 (China Standard Time)

Unfortunately that's the way it works with the NVidia driver. It assumes the presence of a display server to do anything with their NVCtrl API. Some workarounds may exist but they are orthogonal to nvfancontrol.