Comment # 16 on bug 1066589 from Stefan Priebe

Sorry for the slow reply. git bisect points me to this patch:

Author: Egbert Eich <eich@suse.de>
Date:   Tue Jul 18 16:43:19 2017 +0200

    drm/mgag200: Add mode validation debugging code

    Give more verbose debug message at mode bandwidth checks.

    Signed-off-by: Egbert Eich <eich@suse.de>
    Signed-off-by: Takashi Iwai <tiwai@suse.de>


If i revert that one everything is fine.