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[Launchpad Bug Tracker <573290@xxxxxxxxxxxxxxxxxx>]

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OS: Ubuntu Linux 10.04LTS final release. Fresh install 30th April 2010.
Laptop: Fujitsu Siemens Amilo Pi 1536 Video card: ATI mobility Radeon X1400
No third party video drivers installed.
Without second monitor, the laptop-screen looks fine. 3D compiz works smooth. Colors are fine.
In 9.10 the laptop screen and a second monitor worked fine too.

Problem occurence:
When plugging in a second monitor (HP1530) in the DVI-bus on my laptop this is recognized in the ' Monitors'  preferences'  applet. The second screen shows the extended desktop with regularly appearing distortion stripes (like "shocks") in it. 
When trying to shut the HP1530 off with the 'Monitors' preferences' applet, the laptop screen distorted. (The screen image shifts right; the colors are mixed/the resolution is bad). 
When I restart the laptop everything is looking good again.
Trying to reproduce the error, I plugged the monitor in again. ( again in the DVI-bus on the laptop with DVI-cable). Now the monitor says ' input signal out of range' and no image appears on the monitor.  I try to change the frequency in the Monitors preferences applet. (In 9.10 all frequencies worked fine.) The monitor says "Cable disconnected", but Ubuntu still extends the desktop to the second screen. The 'Monitors'-applet still recognizes the HP1530 second screen. I change the frequency again. The laptop screen distorts like before. In this distorted screen I am filing this bug.

This bug looks a bit like:
Bug #556232 "Radeon HD 2600 - Dualscreen problem" 
Bug #533269 "External display not working"
Bug #544525 "[RV380] dual monitor not working - M24 1P [Radeon Mobility X600]"

I decided to file it separately, because it has some differences in
appearance and onset.

Looking at the other bugs it could be a linux kernel bug or an xserver-
xorg-video-ati bug.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-video-ati 1:6.13.0-1ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
Architecture: amd64
CheckboxSubmission: b4311ae1e5eb4c6cf0cecd051cc9f7c2
CheckboxSystem: 331fbefb4b1f6727f4a8261fee7507c9
Date: Sat May  1 22:28:36 2010
DkmsStatus: Error: [Errno 2] Bestand of map bestaat niet
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: FUJITSU SIEMENS AMILO Pi 1536
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=85104184-f3e6-4e54-b4a9-271c4902296a ro quiet splash
ProcEnviron:
 LANG=nl_NL.utf8
 SHELL=/bin/bash
SourcePackage: xserver-xorg-video-ati
dmi.bios.date: 07/19/2007
dmi.bios.vendor: FUJITSU SIEMENS
dmi.bios.version: 1.25
dmi.board.name: AMILO Pi 1536
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.chassis.version: Not Applicable
dmi.modalias: dmi:bvnFUJITSUSIEMENS:bvr1.25:bd07/19/2007:svnFUJITSUSIEMENS:pnAMILOPi1536:pvrNotApplicable:rvnFUJITSUSIEMENS:rnAMILOPi1536:rvrNotApplicable:cvnFUJITSUSIEMENS:ct10:cvrNotApplicable:
dmi.product.name: AMILO Pi 1536
dmi.product.version: Not Applicable
dmi.sys.vendor: FUJITSU SIEMENS
glxinfo: Error: [Errno 2] Bestand of map bestaat niet
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       x86_64
 kernel:             2.6.32-21-generic

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kernel-graphics lucid xserver-xorg-video-ati
-- 
[Lucid AMD64] Dual monitor distortion / crash - ATI mobility Radeon X1400
https://bugs.launchpad.net/bugs/573290
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