On 02/29/2016 04:33 AM, Jani Nikula wrote:
On Wed, 24 Feb 2016, Joseph Salisbury joseph.salisbury@canonical.com wrote:
Hi Sonika,
A kernel bug report was opened against Ubuntu [0]. After a kernel bisect, it was found that reverting the following commit resolved this bug:
commit 237ed86c693d8a8e4db476976aeb30df4deac74b Author: Sonika Jindal sonika.jindal@intel.com Date: Tue Sep 15 09:44:20 2015 +0530
drm/i915: Check live status before reading edidThe 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?
Thanks for the info. I will have all of these commits tested.
There are at least the following commits claiming to fix issues in the above commit. Please make sure you have them.
BR, Jani.
commit 8d409cb3e8a24196be7271defafd4638f3e0b514 Author: Ville Syrjälä ville.syrjala@linux.intel.com Date: Wed Feb 10 19:59:05 2016 +0200
drm/i915: Fix hpd live status bits for g4xcommit 3d8acd1f667b45c531401c8f0c2033072e32a05d Author: Gary Wang gary.c.wang@intel.com Date: Wed Dec 23 16:11:35 2015 +0800
drm/i915: increase the tries for HDMI hotplug live status checkingcommit 97f9010af05c15e0b7e6b4ef6ff8cb0ebb7e7715 Author: Daniel Vetter daniel.vetter@ffwll.ch Date: Fri Dec 11 19:44:15 2015 +0100
drm/i915: mdelay(10) considered harmfulcommit 0f5a9be15797f78c9a34e432f26c796165b6e49a Author: Imre Deak imre.deak@intel.com Date: Fri Nov 27 18:55:29 2015 +0200
drm/i915: take a power domain reference while checking the HDMI live status