Public bug reported:
This does not appear to be the same as https://bugs.launchpad.net/bugs/753971
which relates to Unity. I hope I've filed this under the right package.
Note, all packages on this system are up to date as of 1 hour ago.
When I plug in my external monitor, the image on the laptop (Dell
Latitude D620) and on the monitor (Lenovo L220x) is corrupted. Mostly it
goes black with some white diagonal blocks. See screenshot.
The problem occurs irrespective of whether Unity or Ubuntu Classic
desktop is used. Some parts of the screen return to normal as they get
refreshed, (e.g. network applet, system monitor applet etc), or the
focus is given to an application.
Using the laptop's LCD switcher key sometimes has no effect and
sometimes completely hangs the system to the point of a hard-reset is
required.
Running the 'monitors' program, or xrandr shows both screens are
detected correctly with the correct resolutions.
$ lspci -vvnn | grep 'VGA '
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if
00 [VGA controller])
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-11-generic 2.6.38-11.48
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dave 11930 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xdfebc000 irq 44'
Mixer name : 'SigmaTel STAC9200'
Components : 'HDA:83847690,102801c2,00102201
HDA:14f12bfa,14f100c3,00090000'
Controls : 12
Simple ctrls : 7
CheckboxSubmission: 9590d054d7732d6ca79b1e864619cea7
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Thu Sep 15 10:13:35 2011
HibernationDevice: RESUME=UUID=e58d09c1-6a8c-4a05-b00e-9d33465d2d38
MachineType: Dell Inc. Latitude D620
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
3.3V 32-bit PC Card
ProcEnviron:
LANGUAGE=en_GB:en
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: root=UUID=9845e35f-8bdb-42c2-a6f8-a90922d5a40e ro quiet
splash ipv6.disable=1
RelatedPackageVersions:
linux-restricted-modules-2.6.38-11-generic N/A
linux-backports-modules-2.6.38-11-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-07-03 (73 days ago)
WpaSupplicantLog:
dmi.bios.date: 08/28/2006
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0TD761
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA04:bd08/28/2006:svnDellInc.:pnLatitudeD620:pvr:rvnDellInc.:rn0TD761:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude D620
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 natty
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https://bugs.launchpad.net/bugs/850763
Title:
[Intel 945GM/GMS] Plugging in external display results in garbled
screen
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