I’ll preface this by saying I know it’s not a darktable specific issue, but I’m hoping that someone here might have the information that will help me.
I recently bought a new monitor for editing. I’m connecting to my laptop via USB-C. The laptop is running Fedora 32, uses Nvidia Optimus, which is working fine with proprietary drivers. I’ve confirmed OpenCl is working and I’m launching Darktable with…
__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia darktable
The problem that I am having is that I get high CPU usage when the monitor is plugged in, I get high CPU usage, even if the monitor is disabled using the Gnome settings menu. Unplugging the monitor returns CPU load to “normal” and editing is no longer choppy.
The problem then persists when I try to actually use the monitor, regardless of whether I lower the refresh rate or resolution.
Can anyone shed some light on what the problem might be?