On Fri, 10 Sep 2021, Randy Dunlap <rdun...@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
