Re: [Intel-gfx] Intel UHD resolutions

On Fri, 10 Sep 2021, Randy Dunlap rdunlap@infradead.org wrote:

Hi,

I would like to use QHD resolution (2560x1440) with my shiny new computer and display. That resolution works if I boot Windows 10 (cough).

What do I need to do to use that resolution in Linux?

I first tried openSUSE 15.3 (kernel 5.3.18-59.19-default) then I build a v5.14 kernel and tried that. Both of them max out at FHD (1920x1080).

I am booting with "i915.force_probe=4c8a" on the kernel command line.

I'm guessing you're hitting some dual mode adapter limit.

Please file a bug over at [1], add drm.debug=14 module parameter, and attach dmesg from boot to hitting the issue.

BR, Jani.

[1] https://gitlab.freedesktop.org/drm/intel/issues/new