[gm45] gnome-display-properties sets a to low virtual screen size

[Johan van Zoomeren]

Binary package hint: xorg

General info: Dell E6400 Laptop
Graphics: "Mobile Intel® GM45 Express Chipset"
Connected Monitors: LVDS + LCD

Reproduce path:

1. Open gnome-display-properties
2. Enable second monitor (LCD)
3. Don't use screen mirroring
4. Set maximum screen resolutions for both monitor
5. Apply settings

Results:

1. Both monitors can be set to their maximum resolution
2. Though the Virtual Screen size is set to 1024x768 (way to small) while maximum allowed Virtual Screen size is way bigger
3. The mouse is at first not able to leave the 1024x768 box at the primary monitor
4. After opening for example gnome-terminal, it's possible to move the gnome-terminal all the way to the second monitor
5. Unfortunately the desktop background is only visible in the 1024x768 box on the primary monitor. ( And partly strangely visible on the second monitor )
6. Moving gnome-terminal back to first monitor leaves traces of the gnome-terminal on the second half part or so on the second monitor

xrandr: Screen 0: minimum 320 x 200, current 1024 x 768, maximum 3040 x 1200
xorg.conf: Virtual 3040 1200

Thanks,

Amain

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: wl
Package: xorg 1:7.4~5ubuntu18
ProcEnviron:
 PATH=(custom, user)
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-15-generic (buildd@yellow) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #52-Ubuntu SMP Wed Sep 9 10:48:52 UTC 2009
SourcePackage: xorg
Uname: Linux 2.6.28-15-generic x86_64

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
     Subsystem: Dell Device [1028:0233]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
     Subsystem: Dell Device [1028:0233]

[Johan van Zoomeren (amain)]

In pursuit of an Compiz/Mesa problem( I installed a patched version of mesa from PPA ( https://edge.launchpad.net/~cavedon/+archive/ppa ) and now use emerald instead of metacity as window decorator and I can't reproduce this bug anymore. I see though now different behaviour, maybe related. It seems that depending on the Virtual setting in the "Display" subsection of xorg.conf, gnome-display-settings is acting differently.

1. Virtual 3120 1050: gnome-display-settings report a max resolution of 1280x1024@85 on my second LCD display (actually a beamer). And is perfectly able to extend my desktop without problems and with compiz working.

2. Changing to Virtual 3040 1200, reboot: gnome-display-settings report a max resolution of 1600x1200@60 on my second LCD display. And is again perfectly able to extend my desktop to this higher resolution without problems and with compiz working.

I would expect gnome-display-settings always to report the maximum available resolution.

[Geir Ove Myhr (gomyhr)]

This bug report has been inactive for quite some time and in the meantime Ubuntu has moved along. I hope the reported problem has been resolved in the current version of Ubuntu. If it has not and there are people willing to follow up with information collecting and testing, it is best to file a new bug report with the latest Ubuntu development version (10.04 still works, but soon 10.10 is better), using the ubuntu-bug command if possible. Feel free to mention the bug number of this bug.

We are sorry that we are not always have the capacity to look at all reported bugs in a timely manner. Occasionally we have to purge old bug reports where no progress has been made, whether it is due to reporter not being able to respond or lack of manpower on the Ubuntu side, in order to keep our list of "active" bugs current. Sorry for the inconvenience this may cause.

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