Public bug reported:
I have been happily using 3.11.0-19 since upgrading to 14.04 LTS. Over
the weekend I allowed the system to update to 3.13.0-24. While my
laptop is undocked, the display works find (built in display). When I
dock the laptop into the port-replicator which has 2 monitors attached
via Display Port, the screen becomes severely distorted (very low
resolution and many artifacts). The only way I could get the system
working again was to pick the older 3.11.0-19 kernel from Grub. For
this reason, this 'ubunut-bug' collected information about the good
configuration. Due to the level of corruption I don't believe it would
be possible to collect a report while running the broken kernel.
Please fix. This is a horrible regression.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon May 12 10:34:10 2014
InstallationDate: Installed on 2013-10-26 (197 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to trusty on 2014-04-18 (24 days ago)
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug corruption trusty
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1318714
Title:
Display Port on Nouveau breaks with linux 3.13.0-24
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