Arch Linux

Ffeiofewpoj

Member

Registered: 2012-01-26

Posts: 9

Dual-monitor setup + screen rotation

Hello, I want to use my desktop computer with a dual-monitor setup. I have connected both monitors successfully, but problems arise after this point.

The first problem is that they both just display the same screen and that xrandr only detects one screen called "Screen 0". I can change the screen resolution with it, so at least it sees things correctly, but I don't know how to extend my screen area to a new desktop. Not sure if this is relevant, but they're both monitors of the same model.

[user@archbang ~]$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1600 x 1200, maximum 1600 x 1200
default connected 1600x1200+0+0 0mm x 0mm
   1600x1200       0.0*
   1280x1024       0.0 
   1024x768        0.0 
   800x600         0.0 
   640x480         0.0

The second problem is that I can't rotate my screen (I want this because it has pivot functionality). I'm using the xf86-video-ati driver.

[user@archbang ~]$ xrandr -o left
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  149 (RANDR)
  Minor opcode of failed request:  2 (RRSetScreenConfig)
  Serial number of failed request:  14
  Current serial number in output stream:  14

I hope I've provided enough information. Thanks in advance.

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: Dual-monitor setup + screen rotation

"Screen 0" is the X screen, the virtual desktop. All your monitors are showing an area of it. The output appears to be called "default". Is that the full output of xrandr?

Could you also post the output of "lspci | grep VGA" to show your graphics card model?

Last edited by MisterAnderson (2012-01-28 11:04:24)

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Ffeiofewpoj

Member

Registered: 2012-01-26

Posts: 9

Re: Dual-monitor setup + screen rotation

I have fixed both of these issues by running aticonfig after installing the proprietary catalyst driver. I have not tested aticonfig with the free one.

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: Dual-monitor setup + screen rotation

Glad to know you fixed it.

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