[Bug 96288] New: [Bay Trail-I] HDMI got black screen after boot with 4.0+ kernels

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96288

            Bug ID: 96288
           Summary: [Bay Trail-I] HDMI got black screen after boot with
                    4.0+ kernels
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: phidias.chiang at canonical.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 124208
  --> https://bugs.freedesktop.org/attachment.cgi?id=124208&action=edit
dmesg with drm.debug=0xe

CPU: E3826
Distro: Ubuntu 16.04 LTS

No graphic with 4.0+ kernels. After bisecting we've found this commit causes
regression:

commit d2182a660808d9053a605e3ebc8c46a323ec6e5d
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date: Fri Jan 9 14:21:14 2015 +0200

    drm/i915: Don't register HDMI connectors for eDP ports on VLV/CHV

We reverted this commit in Ubuntu 16.04 kernel (v4.4) and graphic works.

The attachment is dmesg with drm.debug=0xe parameter, with v4.6 kernel from
Ubuntu mainline kernel ppa.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160531/099e4426/attachment.html>