Arch Linux

turkystuffing

Member

Registered: 2008-05-27

Posts: 3

ATI dualscreen resolution woes

I've just done a full update, including the new ATI catalyst drivers.

I'm running a laptop, with a wide-screen display, and a secondary 4:3 LCD display on the side. Previous to the update, the laptop ran its native wide-screen resolution, and the LCD ran it's native 4:3 resolution and I had many happy hours of dual screen joy.

However, after the update, the LCD is running @ 1152x864, and is pretty hard to read as everything is squished in / stretched down, what with it not being a wide screen display. In fact, some of the display is falling off the bottom of the monitor.

The displays are both set to auto detect, and the hardware hasn't changed.

Do I need to do some xorg.conf magic? I don't really want to fix the values as I use the laptop without the LCD on a regular basis, so the autodetect is very useful.

turkystuffing

Member

Registered: 2008-05-27

Posts: 3

Re: ATI dualscreen resolution woes

I've done some more investigating,

I can get it to run two displays ok, i.e. two separate desktops, it's only the "big desktop" that is causing issues.
It's selecting a resolution which is too wide to fit correctly. And it won't let me change it trough the ati config GUI...

AllFather

Member

Registered: 2006-10-03

Posts: 40

Re: ATI dualscreen resolution woes

Same problem here
(a small bump)

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2007.08 - The last proper ARCH install cd.
RIP installer :'-(

Zeist

Arch Linux f@h Team Member

Registered: 2008-07-04

Posts: 532

Re: ATI dualscreen resolution woes

Xinerama forces the same resolution on both screens?

I had this problem when I was running two screens of different sizes which I wanted to run with 1280x1024 and 1024x768. Then it kept forcing the smaller monitor to also use 1280x1024 until I went into my xorg.conf and under the screen I wanted to make use 1024x768 I took the line "Modes" and removed all modes besides from the resolution I wanted to use so that I had:

SubSection "Display"
        Modes    "1024x768"
EndSubSection

Under the screen section for that monitor, I think that there is probably a more elegant way to do it, but that worked.

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I haven't lost my mind; I have a tape back-up somewhere.
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