<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [regression] 3.13.x corrupted framebuffer on boot" href="https://bugs.freedesktop.org/show_bug.cgi?id=75730#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [regression] 3.13.x corrupted framebuffer on boot" href="https://bugs.freedesktop.org/show_bug.cgi?id=75730">bug 75730</a> from <a class="email" href="mailto:mthode@mthode.org" title="Matthew Thode <mthode@mthode.org>"> Matthew Thode</a> <pre>tested with 3.14-rc8 and the fail was even worse. I wasn't able to get dmesg. I was able to record and freeze the frame right before switchover from efi to drm. >From <a href="https://www.youtube.com/watch?v=HRuIAm55eAA">https://www.youtube.com/watch?v=HRuIAm55eAA</a> (slowed down 8x so no sound, but meh). [drm] Initialized drm 1.1.0 20060810 [drm] Memory usable by graphics device = 2048M fb: conflicting fb hw usage inteldrmfb vs simple - removing generic driver all of this seems normal (3.12.8 gives me the same). I slowed down the old video (3.13.5) and here's what I have. [drm] Initialized drm 1.1.0 20060810 [drm] Memory usable by graphics device = 2048M [drm] Supports vblank timestamp caching Rev 2 (21.10.2013) [drm] Driver supports precise vblank timestamp query vgaarb: device chagne decodes: PCI0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem only thing all of this matches 3.12.8 as well, so I don't know where to go, the only thing I can think of is this, but it looks like it's caught in the dmesg I posted earlier. [ 1.270833] [drm] Wrong MCH_SSKPD value: 0x16040307 [ 1.270839] [drm] This can cause pipe underruns and display issues. [ 1.270842] [drm] Please upgrade your BIOS to fix this.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>