[Bug 99929] New: [i915] Black/gray screen with kernel 4.9.3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99929

            Bug ID: 99929
           Summary: [i915] Black/gray screen with kernel 4.9.3
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: anders.blomdell at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

For further info see https://bugzilla.redhat.com/show_bug.cgi?id=1398362


When booting 4.9.3 kernel , gdm starts with a black/gray screen. Some bisecting
gave the results below.

I found that 4.9.3 kernel (from linux-stable) after reverting commit
0ce140d45a8398b501934ac289aef0eb7f47c596, the problem is fixed. Relevant output
from the logs (4.9.3-1-g17a6527 is the one with the reverted patch):


Command line: BOOT_IMAGE=/vmlinuz-4.9.3-1-g17a6527+ root=/dev/mapper/vg0-root
ro rd.auto=1

Command line: BOOT_IMAGE=/vmlinuz-4.9.3 root=/dev/mapper/vg0-root ro rd.auto=1
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun

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