Comment 9 for bug 982251

Forwarding this bug from Ubuntu reporter Martin Albicker:

Black screen lockup, possibly correlated to external monitor hot plug and/or RANDR.

[Original Description]
I hope my description in english is good enought, that you can understood it.

if i conect an external monitor, it is sometimes impossible to select all modis (clone, dualview, only laptop, only external monitor).
And after i reconect the monitor, the default resolution of the laptop monitor, dont come back. Sometimes i get a resoltion of 4:3 instead of 16:10, and sometimes the screen persists black. So i musst restart the laptop, that the default resolution come back.

An other Bug that don't associate with this bug is, that the mousepad freezes sometimes. To solve this i musst restart my laptop.

My used Hardware is a Samsung x360 laptop.

Wenn man den Externen Bildschrim ber den VGA stecker anschliet, lassen sich manchmal nicht alle Modis einstellen. Ebenfalls kam es schon vor das anschlieend das Bild nicht mehr auf den Laptop zurckzuholen ging.
Erst nach einem Neustart funktionierte es dann wieder.

Bei meiner Hardware handelt es sich um einen Samsung x360

gre Martin

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64

ApportVersion: 2.0.1-0ubuntu2
Architecture: amd64
Chipset: gm45
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Sun Apr 15 09:29:58 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
 virtualbox, 4.1.12, 3.2.0-21-generic, x86_64: installed
 virtualbox, 4.1.12, 3.2.0-22-generic, x86_64: installed
 virtualbox, 4.1.12, 3.2.0-23-generic, x86_64: installed
DuplicateSignature: [gm45] GPU lockup render.IPEHR: 0x01820000 Ubuntu 12.04
ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c03e]
   Subsystem: Samsung Electronics Co Ltd Device [144d:c03e]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120321)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/share/apport/apport-gpu-error-intel.py

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=816ba687-c7bc-472a-aae3-89afe5cd0d54 ro quiet splash acpi_osi=Linux acpi_backlight=vendor
 xserver-xorg 1:7.6+12ubuntu1
 libdrm2 2.4.32-1ubuntu1
 xserver-xorg-video-intel 2:2.17.0-1ubuntu4
SourcePackage: xserver-xorg-video-intel
Title: [gm45] False GPU lockup render.IPEHR: 0x01820000
UpgradeStatus: No upgrade log present (probably fresh install)

dmi.bios.date: 08/05/2010
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 10LM.M014.20100805.KSY
dmi.board.name: X360
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr10LM.M014.20100805.KSY:bd08/05/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnX360:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnX360:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: X360
dmi.product.version: Not Applicable
version.compiz: compiz 1:
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2