Mint 11 - Dual Monitor Problems

[Urlauber]

Hi,

i have a Problem using two monitors with Mint 11. At the moment both monitors show the same content, if i change it to use both monitors they are just showing weird things and i have to wait a few seconds until it automatically changes back. i can draw the mouse on both monitors but i just can see many colours and boxes.

My linux knowledge is not very good, so the search function gave me no result.

I have an ATI Radeon 9500 Card with a VGA and an DVI Output that i use both, and two identical Samsung SyncMaster 2494 Monitors.
Within Windows XP and 7 everything works fine.

Code: Select all

inxi -Gxc 0
Graphics:  Card ATI Radeon R300 NE [Radeon 9500 Pro] X.Org 1.10.1 Res: 1920x1080@60.0hz, 1920x1080@60.0hz 
           GLX Renderer Gallium 0.4 on ATI R300 GLX Version 2.1 Mesa 7.10.2 Direct Rendering Yes

Code: Select all

xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 4096 x 4096
VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
   1920x1080      60.0*+
   1600x1200      60.0  
   1680x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1280x800       59.8  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        60.0  
DVI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
   1920x1080      60.0*+   50.0  
   1600x1200      60.0  
   1680x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1280x800       59.8  
   1280x720       50.0     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   720x576        50.0  
   720x480        59.9  
   640x480        60.0  
S-video disconnected (normal left inverted right x axis y axis)

thanks for your help, i really hate changing to windows to use the monitors

[lahirdenganselamat]

GLX Renderer Gallium 0.4 on ATI R300

Seems like you use opensource driver (oh, i've check here and it says that "ATI/AMD dropped Catalyst support for these cards in Catalyst 9-4. These cards are supported with the legacy ATI 9-3 Catalyst release, but you MUST use a kernel 2.6.28 (or earlier) and Xserver 1.5 (or earlier). For example, you can use Catalyst 9-3 if you're running Ubuntu 8.04 or Debian Lenny/5.0. Open source support is good and 3D is still improving")

I don't know if Radeon driver offering multi display option, (I use catalyst driver on my Katya, and it works on my 6310)
I think that was something inside the opensource driver, if you want to use Catalyst driver, just like the wiki says, you must use a kernel 2.6.28 (or earlier) and Xserver 1.5 (or earlier). either downgrade or wait for the opensource driver update..

maybe you can check here, (I don't really understand what it says, but it says that dual link DVI was done)