kernel-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

Public bug reported:

Switching between extended/mirror modes when a HDMI monitor is plugged
in causes a system hang on at least some machines, like my SKL-Y
ultramobile test system. It needs a backport of an upstream commit from
4.3, modified to work on 4.2-based i915_bpo:

commit f015c5518879fb3e578caaa63806617468a24045
Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date:   Wed Jun 24 22:00:02 2015 +0300

    drm/i915: Split atomic wm update to pre and post variants
--

the watermark stuff is Skylake-specific, so can't regress BSW/BDW. This
has been tested on a number of SKL machines now, fixing the bug.

** Affects: linux (Ubuntu)
     Importance: High
         Status: In Progress

** Affects: linux (Ubuntu Vivid)
     Importance: Critical
     Assignee: Timo Aaltonen (tjaalton)
         Status: In Progress

** Also affects: linux (Ubuntu Vivid)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
       Status: New => In Progress

** Changed in: linux (Ubuntu Vivid)
   Importance: Undecided => Critical

** Changed in: linux (Ubuntu Vivid)
       Status: New => In Progress

** Changed in: linux (Ubuntu Vivid)
     Assignee: (unassigned) => Timo Aaltonen (tjaalton)

-- 
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https://bugs.launchpad.net/bugs/1493746

Title:
  [SKL, i915_bpo] System hang when switching between extended/mirror
  modes

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Vivid:
  In Progress

Bug description:
  Switching between extended/mirror modes when a HDMI monitor is plugged
  in causes a system hang on at least some machines, like my SKL-Y
  ultramobile test system. It needs a backport of an upstream commit
  from 4.3, modified to work on 4.2-based i915_bpo:

  commit f015c5518879fb3e578caaa63806617468a24045
  Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
  Date:   Wed Jun 24 22:00:02 2015 +0300

      drm/i915: Split atomic wm update to pre and post variants
  --

  the watermark stuff is Skylake-specific, so can't regress BSW/BDW.
  This has been tested on a number of SKL machines now, fixing the bug.

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