[Bug 111495] Black Screen on Ubuntu 18.04 + Intel Graphics with Kernel > 4.15.0-47

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111495

--- Comment #4 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Something wrong with gmbus:

[   91.093546] [drm:intel_hdmi_detect [i915]] [CONNECTOR:88:HDMI-A-1]
[   91.106728] i915 0000:00:02.0: HDMI-A-1: EDID is invalid:
[   91.106735]  [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
...

Even bitbanging doesnt work:
[   91.106887] [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read failed,
retry using GPIO bit-banging
[   91.106978] [drm:intel_gmbus_force_bit [i915]] enabling bit-banging on i915
gmbus dpb. force bit now 1
[   91.140230] i915 0000:00:02.0: HDMI-A-1: EDID is invalid:
[   91.140234]  [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
...

All reads just return 0 for some reason.

-- 
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/20190829/5f6f5952/attachment.html>