← Back to team overview

kernel-packages team mailing list archive

[Bug 1493746] Re: [SKL, i915_bpo] System hang when switching between extended/mirror modes

 

On PAR4-DVT2-C2U with the kernel 3.19.0-28.30+bpo1 (download from
http://koti.kapsi.fi/~tjaalton/skl/), the system hung doest not  occurs
when switching VGA output.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
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 an external 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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1493746/+subscriptions


References