[gm45] 1900x1280 dell screen switch does not work

[Onno Timmerman]

laptop dell E4300
dell port replicator
screen del 1900x1280
ubuntu 9.04

problem: when switching from laptop screen to my dell screen 1900x1280 it gives a blank screen. Also on startup it gives blank black.

Workaround:
First switch from screen by truning laptop screen off go to resolution 1280x1200 on the monitor. Work for about 10 minitus and then switch the screen to 1900x1280.

extra:
Don't leave your computer for more then x minutes else you never know if you need to repeat the process to get the native screen resolution of your 24'

thxs

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
     Subsystem: Dell Device [1028:024d]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
     Subsystem: Dell Device [1028:024d]

[Alex Valavanis (valavanisalex)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please run the command 'apport-collect 417614' which will attach necessary information for debugging this as an Xorg problem. Thanks in advance.

[Boris Burtin (boris-burtin)]

I have a similar problem with my setup:

Dell D620
Dell port replicator
Dell 2100FP monitor (1600x1200 native) at home
Dell 24" monitor at work
Ubuntu 8.10

Whenever I want to switch monitors, I have to restart Ubuntu. If I work on the laptop screen, suspend, dock, then resume, it never detects the big monitor. It keeps using the laptop screen. To make matters worse, the big monitor's native resolution isn't available in the Screen Resolution applet. The only workaround I've found is to restart.

[Boris Burtin (boris-burtin)]

I'm happy to provide more details about my system, but it looks like apport-collect is only available in 9.04? Let me know if there's any data I should gather from my 8.10 setup. I've been reluctant to upgrade because of the reported problems with the Intel chipset video driver in 9.04.

[Onno Timmerman (onno-filosofie)]

Architecture: amd64
DistroRelease: Ubuntu 9.04
Package: xorg 1:7.4~5ubuntu18
PackageArchitecture: amd64
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=nl_BE.UTF-8
ProcVersion: Linux version 2.6.28-15-generic (buildd@yellow) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #49-Ubuntu SMP Tue Aug 18 19:25:34 UTC 2009
Uname: Linux 2.6.28-15-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Bryce Harrington (bryce)]

Onno Timmerman - I've forwarded this bug upstream to https://bugs.freedesktop.org/show_bug.cgi?id=23720 - please subscribe yourself to this bug, in case they need further information or wish you to test something. Thanks ahead of time!

[Bryce Harrington (bryce)]

Also, this sounds sort of like an X Freeze bug. Some additional debug steps are documented for this class of bug, if you'd like to help gather some additional data: https://wiki.ubuntu.com/X/Troubleshooting/Freeze#How%20to%20Get%20a%20Batchbuffer%20Dump%20(-intel%20only)

[Onno Timmerman (onno-filosofie)]

No the computer keeps working. You here sound etc and can switch back to
laptop and later try again go the 24"

Als somethimes I notice that there is a trail, some sort transparancy of
the desktop when switcing back and forth. Everthing works but all
windows when moved leave a trail behind. I'm not sure if its related to
the switch bug.

Bryce Harrington schreef:
> Also, this sounds sort of like an X Freeze bug. Some additional debug
> steps are documented for this class of bug, if you'd like to help gather
> some additional data:
> https://wiki.ubuntu.com/X/Troubleshooting/Freeze#How%20to%20Get%20a%20Batchbuffer%20Dump%20(-intel%20only)
>

[Onno Timmerman (onno-filosofie)]

same problem in 09.10

[Bryce Harrington (bryce)]

Onno, upstream needs further feedback from you. If you are still seeing this bug please discuss with them at
https://bugs.freedesktop.org/show_bug.cgi?id=23720

Try removing the 'Virtual' line from your xorg.conf, it may be limiting your resolution capabilities.

[Bryce Harrington (bryce)]

According to upstream the issue is fixed in 10.04.