Comment # 4 on bug 1131062 from Takashi Iwai

... and looking through the recent commits, I found that SLE15/Leap15.0 still
contains a commit that is known to be problematic for SLE15-SP1/Leap15.1 and TW
(bug#1129027):
d179b88deb3bf6fed4991a31fd6f0f2cad21fab5
    drm/i915/fbdev: Actually configure untiled displays

I'm building a kernel with the revert in OBS home:tiwai:bsc1131062 repo.
Could you give it a try later?