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Kubuntu Intrepid - Wrong resolution on external display

Posted: Sat Nov 01, 2008 9:28 am
by d.hefft
Here is my setup :
My laptop is a Thinkpad X60 with an integrated graphics chipset INTEL 945GM.
It is docked in an X6-docking station.
An external LCD monitor is plugged on the docking station (using the VGA connector).
The laptop's lid is generally closed (resolution 1024x768).

With this setup, the external monitor is set up by X with a 1024x768 resolution whereas the preferred one is 1280x1024.
It is not possible to choose this resolution in the drop-down-list for the external VGA in the display-settings.


Expected behaviour :
When the lid is closed, the LVDS panel should be disabled and the external monitor should be set up with its preferred resolution.
When the lid is opened, 2 possibilities :
-1- the LVDS panel should be disabled and the external monitor should be set up with its preferred resolution.
-2- both monitor are enabled, set up with their preferred resolution and configured as "extended desktop" (one desktop on two monitors).

I would be really gratefull if somebody could help me with this.

Posted: Sat Nov 01, 2008 3:18 pm
by poshgeordie
Since Intrepid has just been released, I would suggest a a reinstall.

Connect the external monitor to the the TP and via the external monitor, reinstall 8.10 and it should pick up the correct resolution.

The technical solution.... I'll post an edit.

<EDIt> Install 915resolution via Synaptic.
More details at this post from Ubuntu forums.
There are loads of solutions from Ubu forums - worth joining and doing a Search.

Posted: Sun Nov 02, 2008 6:46 am
by tylerwylie
xrandr should do everything you need.

Posted: Thu Nov 13, 2008 3:42 pm
by ThomasAdam
tylerwylie wrote:xrandr should do everything you need.
Unfortunately not -- it's still in the stages of being compatible with what xinerama allows for.

-- Thomas Adam

Posted: Mon Nov 24, 2008 2:03 am
by mikeh
poshgeordie wrote: Connect the external monitor to the the TP and via the external monitor, reinstall 8.10 and it should pick up the correct resolution.
Whoa! Overkill, i think. These days, the video-hardware detection is done when X starts, not during installation. You can usually pull a linux hard-drive out of one PC, put it in a different PC, and it will still work.

I have a similar problem with the X40 and intrepid. I need to restart the X-server after the external monitor is connected. (e.g. log out and back in.)
But better to stick with 8.04 for now.