On debian previous version (jessie) I managed to use my 3 screen on KDE but since stretch update, my conf doesn't work anymore.
If anyone could help me?
My configuration
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Ecran 1 (DVI) -- Ecran 2 (VGA) - - Ecran 3 (VGA)
| | | |
|____________________________| |_______________________|
Card : Radeon X1550 64-bits Card : Radeon 3000
Resolution : Screen 1: 1680x1050 Resolution : Both 1280x1024
Screen 2: 1024x768
First I found this link http://nouveau.freedesktop.org/wiki/MultiMonitorDesktop with nouveau driver but nouveau doesn't work at all with my cards.
I'm freely inspired by this post: https://bbs.archlinux.org/viewtopic.php?id=143690.
Actually the better I managed is to use 2 screens from my Radeon X1550 64-bits graphics card with this xorg.conf (I commented one line with driver "radeon")
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Section "ServerLayout"
Identifier "Layout0"
Option "Xinerama" "on"
Option "Clone" "on"
# You would need one screen for each monitor
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" LeftOf "Screen0"
Screen 2 "Screen2" RightOf "Screen0"
EndSection
Section "Device"
Identifier "Device0"
# if ucommented X server failed with segmentation fault:
# Driver "radeon"
# Actual PCI location of first card/gpu
BusID "PCI:2:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Device1"
Driver "radeon"
BusID "PCI:2:0:1"
Screen 0
EndSection
Section "Device"
Identifier "Device2"
Driver "radeon"
BusID "PCI:1:5:0"
Screen 0
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
Section "Monitor"
Identifier "Monitor0"
EndSection
Section "Monitor"
Identifier "Monitor1"
EndSection
Section "Monitor"
Identifier "Monitor2"
EndSection
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# lspci |grep VGA
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS780L [Radeon 3000]
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV505 [Radeon X1550 64-bit]
$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x99 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 3 associated providers: 0 name:ATI Radeon X1550 64-bit @ pci:0000:02:00.0
Provider 1: id: 0x53 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 2 associated providers: 0 name:ATI Radeon 3000 Graphics @ pci:0000:01:05.0
if I activate xinerama and set "radeon" driver on first graphic card (like I used on Jessie), X server crash with segmentation fault.
If I set "radeon" driver for my 2 graphics cards then I must deactivate xinerama option and I can use only 2 screen from my graphics cards and xrandr
Any help will be welcome (or a nice site to obtain help
.Thxs
Pascal B