I’m using a 4k monitor over usb-c with my 12th gen DIY edition, and Gentoo Linux.
I’m using the modesetting X11 driver with Glamor acceleration. Linux 6.1.10, with a hand-built kernel config.
Basically, graphics performance really lags when using this external monitor. Things like browsing the web. Graphics performance is snappy without the external monitor.
I don’t see any particular errors or warnings in dmesg or Xorg.0.log,
Any suggestions? Should I expect this to work better?
There isn’t really a stock kernel for this distro. Is there any recommended list of kernel modules/features for Framework laptops? I mostly worked off of the suggestions on this wiki page. then added things as I ran into them.
It’s probably running on 30Hz. For some reason that always lags, in my experience, even on dedicated cards on desktop.
Can you check? Perhaps try with the display port adapter or a different cable or something?
I haven’t managed to get 60fps over USB-C on my 4k screen either, but I rarely use it and never bothered to check what the problem is there, and yes, it lags on the laptop while only letting me choose 30Hz, and if I explicitly choose 30 on the desktop it also lags behind but is perfectly fine on 60.
Now, the 4k external over usb-c … is working great. I guess powering the larger resolution just tended to push the mainboard harder and it was probably throttling inappropriately.