[Intel-gfx] Intel UHD resolutions

[Jani Nikula]

On Fri, 10 Sep 2021, Randy Dunlap <rdunlap at 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



-- 
Jani Nikula, Intel Open Source Graphics Center