Big desktop with Ubuntu 9.04 on ATI Card

[srimalj]

Hi

Has anyone got big (large desktop) working with Ubuntu 9.04 with an ATI card?

(i,e a setup where you have 2 or more monitors and you have one seamless desktop where you can move windows across the monitors - i hope i'm using the right terminology)

This is my setup

$ lspci | grep -i vga
01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3450

with 2 identical monitors.

I managed to get a dual head setup (at least i think thats what its called)..

using

# aticonfig--initial
# aticonfig--initial=dual-head


This is perfect except for the fact that both displays act as two separate workstations -- ie i cant move windows accros the two displays

Any idea/experience on how I can merge the 2 displays in to one big desktop?

Thanks in advance

Srimal.

[alfalfa31]

I'm running 5 monitors, two 22" @ 1680x1050 and 3 17" @ 1280x1024, total usable width of 7200px (which is nuts, I know, but why not, right?). They're running on quad RadeonHD 3650's. I'd be running 8 if I had either the desk space or the desire to go vertical.


-----------------------------------------------------------------------
| | | | | |
| | | | | |
| 17" 1 | 17" 2 | 22" 1 | 22" 2 | 17" 3 |
| | | | Primary | |
| | | | | |
------------------------| | |------------
-----------------------------------

I had to hand edit my xorg.conf file to make it go (which I've been doing for a while anyway).


Section "ServerLayout"
Identifier "aticonfig Layout"
Screen 0 "aticonfig-Screen[0]-0" 4240 0
Screen "aticonfig-Screen[0]-1" 2560 0
Screen "aticonfig-Screen[1]-0" 1280 0
Screen "aticonfig-Screen[1]-1" 0 0
Screen "aticonfig-Screen[2]-0" RightOf "aticonfig-Screen[0]-0"
EndSection

Section "Files"
EndSection

Section "Module"
EndSection

Section "ServerFlags"
Option "Xinerama" "on"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]-1"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[1]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[1]-1"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[2]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]-0"
Driver "fglrx"
Option "PairModes" "1680x1050+1680x1050"
Option "DesktopSetup" "horizontal,reverse"
BusID "PCI:1:0:0"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]-1"
Driver "fglrx"
BusID "PCI:1:0:0"
Screen 1
EndSection

Section "Device"
Identifier "aticonfig-Device[1]-0"
Driver "fglrx"
Option "PairModes" "1280x1024+1280x1024"
Option "DesktopSetup" "horizontal,reverse"
BusID "PCI:2:0:0"
EndSection

Section "Device"
Identifier "aticonfig-Device[1]-1"
Driver "fglrx"
BusID "PCI:2:0:0"
Screen 1
EndSection

Section "Device"
Identifier "aticonfig-Device[2]-0"
Driver "fglrx"
BusID "PCI:5:0:0"
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]-0"
Device "aticonfig-Device[0]-0"
Monitor "aticonfig-Monitor[0]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]-1"
Device "aticonfig-Device[0]-1"
Monitor "aticonfig-Monitor[0]-1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "aticonfig-Screen[1]-0"
Device "aticonfig-Device[1]-0"
Monitor "aticonfig-Monitor[1]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "aticonfig-Screen[1]-1"
Device "aticonfig-Device[1]-1"
Monitor "aticonfig-Monitor[1]-1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "aticonfig-Screen[2]-0"
Device "aticonfig-Device[2]-0"
Monitor "aticonfig-Monitor[2]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

If you enable xinerama it should get things running for you (which you can do in xorg.conf or in the Catalyst control center). Problem is, I don't know what driver versions you're running and if you've upgraded to 9.10 (which was a pain for me).