Hi Daniel,
My apologies for the long delay in answering, I've somehow mixed up different bugreports and thought I've sent you a patch to test already. Anyway, please test
Tested-by: Henrik Rydberg <rydberg@euromail.se>Can you please boot with drm.debug=0xe added to your kernel cmdline with that patch applied and attach the full dmesg?
Are you looking for something in particular? The patch obviously works because edp_bpp is never set. The reason seems to be
[ 1.634759] [drm:intel_parse_bios], VBT signature missing
In the source, a few lines above that message, we have something that looks suspciciously like an off-by-one error:
/* Scour memory looking for the VBT signature */ for (i = 0; i + 4 < size; i++) {
If that matters or not, I do not know. Any more tests would have to wait until tomorrow.
Thanks, Henrik