DVI/VGA/HDI mess on Radeon HD 6570
airlied at redhat.com
Mon Dec 19 09:14:13 PST 2011
> about two months ago I bought a Radeon HD 6570 with
> 2GB memory for my main computer and I have a single
> monitor connected to it, until now via VGA D-Sub.
> Last week our secondary TV died (it was 15 years old, R.I.P.)
> so I bought a nice 32" LED TV which has 3 external HDMI
> The HD 6570 has one DVI-D, one HDMI and one VGA connectors
> so I thought it would be fun to allow the family to watch videos
> while I can also work on the computer.
> Here comes my problem: no matter which connectors I use
> for the monitor (DVI-D or D-Sub), if the TV is switched on,
> HDMI comes up as primary display. The result: GNOME 3
> workspaces are switchable on the TV but a single workspace
> is visible on my monitor. This would be the perfect setup
> if I can reverse the roles of the TV and the monitor.
> "man radeon" had an option which I tried but didn't help:
> Option "ZaphodHeads" "DVI-0,HDMI-0"
xrandr --output DVI-0 --primary
or open the gnome display applet and drag the bar from one monitor to another.
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