RE: [4.4-rc1][Regression] drm/i915: Check live status before reading edid
From: Jindal, Sonika
Date: Wed Feb 24 2016 - 22:53:52 EST
Yes, first thing to try is to increase the tries.
Can you please point me to the bug and provide more details like platform, monitor, cable.
Are you referring to the same issue as Oleksandr reported where a single link dvi/hdmi cable didnât work and dual link worked?
From: Joseph Salisbury [mailto:joseph.salisbury@xxxxxxxxxxxxx]
Sent: Thursday, February 25, 2016 3:09 AM
To: Jindal, Sonika <sonika.jindal@xxxxxxxxx>
Cc: Sharma, Shashank <shashank.sharma@xxxxxxxxx>; Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>; Daniel Vetter <daniel.vetter@xxxxxxxx>; Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>; David Airlie <airlied@xxxxxxxx>; intel-gfx <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>; dri-devel <dri-devel@xxxxxxxxxxxxxxxxxxxxx>; LKML <linux-kernel@xxxxxxxxxxxxxxx>
Subject: [4.4-rc1][Regression] drm/i915: Check live status before reading edid
A kernel bug report was opened against Ubuntu . After a kernel bisect, it was found that reverting the following commit resolved this bug:
Author: Sonika Jindal <sonika.jindal@xxxxxxxxx>
Date: Tue Sep 15 09:44:20 2015 +0530
drm/i915: Check live status before reading edid
The regression was introduced as of v4.4-rc1.
I was hoping to get your feedback, since you are the patch author. Do think increasing the number of tries in intel_hdmi_detect() is worth trying? Do you think gathering any additional data will help diagnose this issue, or would it be best to submit a revert request?