Public bug reported:
I have two Dell U2711 monitors plugged into a HD7750 card. One monitor
is connector via DisplayPort, the other via DVI. If I switch the
monitors off then on again the monitor connected via DisplayPort
displays a blank screen. The DVI monitor works correctly. I have to
reboot the machine to get the DisplayPort monitor working again. This
problem did not occur with 13.04.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-video-radeon 1:7.2.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
Uname: Linux 3.11.0-7-generic x86_64
ApportVersion: 2.12.1-0ubuntu4
Architecture: amd64
Date: Mon Sep 16 20:59:55 2013
InstallationDate: Installed on 2013-09-14 (2 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902.1)
MarkForUpload: True
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: xserver-xorg-video-ati (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug saucy
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https://bugs.launchpad.net/bugs/1226009
Title:
DisplayPort monitor is blank after unplug/replug or switch off/on
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