[Bug 99709] New: Screen Flickering i915 with drm-nightly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99709

            Bug ID: 99709
           Summary: Screen Flickering i915 with drm-nightly
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: rami.vanguri at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 129403
  --> https://bugs.freedesktop.org/attachment.cgi?id=129403&action=edit
dmesg output with drm.debug=14 on

Summary of the problem:
Screen flickering under highest resolution (3840x2160) with external
monitor connected to DisplayPort.  This is with an X1 Carbon (3rd
generation) and flickering only happens on external monitor and only
on highest resolution.  This is with drm-nightly from 2-6-2017.  On older
kernels there was a FIFO underrun message but that no longer appears.

Kernel version (from /proc/version):
Linux version 4.10.0-994-generic (kernel at gomeisa) (gcc version 6.2.0
20161005 (Ubuntu 6.2.0-5ubuntu12) ) #201702052101 SMP Mon Feb 6
02:02:51 UTC 2017

Attached is dmesg.txt with drm.debug=14 on.

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170207/ed8ac6a9/attachment.html>