[Bug 101001] New: [BISECTED] Regression: drm/i915 crashes on boot (Broadwell)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=101001

            Bug ID: 101001
           Summary: [BISECTED] Regression: drm/i915 crashes on boot
                    (Broadwell)
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.1.1
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lukkash at email.cz
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 181911
  --> https://bugzilla.kernel.org/attachment.cgi?id=181911&action=edit
picture of the crash of the offending commit while bisecting

My Thinkpad T450s (i5-5300U) won't boot with kernel version 4.1.1. 4.0.5 boots
fine (Although I've seen some weird failures of the i915 driver in syslog from
time to time. I can try to look them up and provide them on request.).

I've bisected the kernel to find the offending commit:

commit 678d96fbb3b5995a2fdff2bca5e1ab4a40b7e968
Author: Ben Widawsky <benjamin.widawsky at intel.com>
Date:   Mon Mar 16 16:00:56 2015 +0000

    drm/i915: Track GEN6 page table usage


The traces printed to the console vary a lot. Sometimes I'd just get a blinking
cursor. Attached are 2 photos, the console1.jpg I got when I found the
offending commit while bisecting, the console2.jpg is from the 4.1.1 version.

My .config is attached. I'm running an up to date 'unstable' Gentoo system and
compile everything into the kernel - no modules.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.