Hello, I just got my triple-head setup across three GPUs working. Read below for the steps, in case you are struggling as well.
Is there a way to write all this setup into xorg.conf, rather than having to execute xrandr-commands from xinitrc or similar? The reason is that I want the same setup for all users and so would prefer centralised configuration. Here's what I did: % xrandr --listproviders Providers: number : 3 Provider 0: id: 0xdc cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 3 associated providers: 0 name:radeon Provider 1: id: 0x97 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 3 associated providers: 0 name:radeon Provider 2: id: 0x54 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 3 associated providers: 0 name:radeon # enslave the second and the third to the first xrandr --setprovideroutputsource 1 0 --setprovideroutputsource 2 0 # optional: add a new mode to the VGA-1-0 output # (since the Monitor setting in xorg.conf seems to be ignored) xrandr --newmode "1280x1024" 138.54 1280 1368 1504 1728 1024 1025 1028 1069 -HSync +Vsync xrandr --addmode VGA-1-0 1280x1024 # align the heads xrandr --output DVI-1 --auto --output DVI-2-2 --auto --right-of DVI-1 --output VGA-1-0 --mode 1280x1024 --right-of DVI-2-2 Somehow I would really like to rename those funky xrandr names. Then again, once this is all hidden away in xorg.conf, it won't be much of a bother. Thanks, -- martin | http://madduck.net/ | http://two.sentenc.es/ "i always choose my friends for their good looks and my enemies for their good intellects. man cannot be too careful in his choice of enemies." -- oscar wilde spamtraps: madduck.bo...@madduck.net
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