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[Launchpad Bug Tracker <1345573@xxxxxxxxxxxxxxxxxx>]

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Since upgrading HWE from -lts-saucy to -lts-trusty, I have had recurring
graphical glitches on screen, with short black horizontal lines
appearing briefly on screen (on top of normal contents), particularly
when switching between applications. The lines appear only for a few 100
ms before going away (just enough to register in your eye that there's
something there), so I've been trying to make a screen recording to
capture it, but of course the phenomenon goes away when I do (perhaps
RecordMyDesktop does something with the screen that makes it less likely
to appear).

I have another 12.04 system with desktop Radeon graphics, and there
-lts-trusty has not produced this issue so far (the one with the issue
and the one I'm attaching the logs here from has Intel).

I don't recall seeing this with -lts-saucy or other previous Xorg
packages. It was so obvious right after upgrading that either it never
occurred before or was so rare or quick to flash away that it didn't
register.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-lts-trusty 1:7.7+1ubuntu8~precise1
ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
CheckboxSubmission: 09ae689090491ca53449589269e4bfd8
CheckboxSystem: edda5d4f616ca792bf437989cb597002
Date: Sun Jul 20 15:21:12 2014
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MarkForUpload: True
SourcePackage: xorg-lts-trusty
UpgradeStatus: Upgraded to precise on 2014-07-11 (9 days ago)

** Affects: xorg (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug precise running-unity
-- 
Horizontal lines flashing on screen briefly
https://bugs.launchpad.net/bugs/1345573
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