On Thu, Jun 14, 2012 at 4:00 PM, Dave Airlie <airl...@gmail.com> wrote: > On Thu, Jun 14, 2012 at 2:26 PM, Wouter M. Koolen > <w.m.koolen-wijks...@cwi.nl> wrote: > cc'ing Daniel. > >> Hi Igor and Len, >> >> When I cold boot 3.4 on my laptop the second monitor attached to the >> displayport stays blank. It works fine with 3.3.8 and earlier. >> >> I get two error messages in dmesg: >> >> kernel: video: probe of LNXVIDEO:00 failed with error -5 >> >> kernel: [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, >> aborting >> >> When I warm boot 3.4 after running kernel 3.3.8 first, only the first >> message appears and the display works fine.
Ok, the second message is actually the one explaining the black screen. Can you please boot with drm.debug=0xe added to your kernel cmdline and attach the full dmesg, so we know a bit what your display hw looks like? Also, please redo the bisect if possible (with coldboots) and hunt for the black screen/the "failed to train DP" message. Thanks, Daniel -- Daniel Vetter daniel.vet...@ffwll.ch - +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
