Comment # 24 on bug 1208939 from Stefan Dirsch

Ok. ChatGPT just told me that gkrellm uses nVidia's XNVCtrl Xserver extension
tp display the temperature. I'm not sure how this extension gets added to the
Xserver. Either by loading nVidia's glx extension or the X driver itself. But
both are in nvidia-gl-G06.

/usr/lib64/xorg/modules/extensions/libglxserver_nvidia.so.525.89.02
/usr/lib64/xorg/modules/drivers/nvidia_drv.so

You can check that with xdpyinfo. One of the extension will be called 'XNVCtrl'
or similar. So of course after installing nvidia-gl-G06 you also need to
restart the Xserver.