drm-i915-update-38, no output on high resolution display

[Jean-Sébastien Pédron]

Le 19/01/2016 11:35, Stefan Grundmann via freebsd-x11 a écrit :
> during testing on a Lenovo Thinkpad W541 (20EF0020GE: Core 
> i7-4910QM, NVIDIA Quadro K2100M optimus) i found that after commit
> 72bb3b3f9dcaf573be532ced9043eb59dedf21df "drm/i915: set
> TRANSCODER_EDP even earlier", kldload i915kms results in a blank
> internal display (eDP1, 2880x1620).
> 
> reverting 72bb3b3f9dcaf573be532ced9043eb59dedf21df make the output 
> work again on all tested revisions.

Hi!

Thank you for tracking this problem down!

An issue was created on GitHub:
https://github.com/freebsd/freebsd-base-graphics/issues/4

I have a similar problem with an UltraHD monitor plugged to a Haswell
desktop and I get a blank screen when using the native resolution.
FullHD works.

-- 
Jean-Sébastien Pédron