[i945gm] external screen does not work consistently

[Kai Aeberli]

Binary package hint: xorg

When plugging in an external LCD Screen (LG Flatron L1915S) into my Thinkpad R60 Laptop, it works only very inconsistently. What happens is that the screen shows for a split-second and then goes dark.

This behaviour occurs sometimes when resuming from hibernation, or just when hotplugging the screen. I even had it when booting up with the screen connected. I am finding it difficult to pinpoint the exact conditions of the error.

Further, when it does work, as soon as I plug in the external screen, all desktop effects are disabled, and I have to enable them again. Also, Desktop effects don't work when displaying on both screens.

The bug report command was run at a time where the external monitor was working.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Tue May 4 14:13:16 2010
DkmsStatus:
 virtualbox-ose, 3.1.6, 2.6.32-21-generic, i686: installed
 virtualbox-ose, 3.1.6, 2.6.32-22-generic, i686: installed
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: LENOVO 9457G6G
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=67fe85ce-de5a-4137-994a-7532edff29c0 ro quiet splash
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 08/28/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7CETD3WW (2.23 )
dmi.board.name: 9457G6G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7CETD3WW(2.23):bd08/28/2009:svnLENOVO:pn9457G6G:pvrThinkPadR60:rvnLENOVO:rn9457G6G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 9457G6G
dmi.product.version: ThinkPad R60
dmi.sys.vendor: LENOVO
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.32-22-generic

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
     Subsystem: Lenovo Device [17aa:201a]

[Kai Aeberli (kai.aeberli)]

Update: it just happened when I just switched off the external screen for a while. When I switched it on again, it blinked and then went black. Plugging it out and then in again solved it (this time)

[Kai Aeberli (kai.aeberli)]

Update: after the recent lucid update, it stopped working altogether. Now it always blinks once and then switches off.

[penalvch (penalvch)]

Kai Aeberli, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p xserver-xorg-video-intel REPLACE-WITH-BUG-NUMBER

Please note, given that the information from the prior release is already available, doing this on a release prior to the development one would not be helpful.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

[Launchpad Janitor (janitor)]

[Expired for xserver-xorg-video-intel (Ubuntu) because there has been no activity for 60 days.]