Radeon: hot-swap VGA-out monitor
chris at singleys.com
Wed Sep 5 05:59:34 PDT 2007
I have a Thinkpad R51 with an ATI Radeon 250 graphics card. The card has a
VGA out port, and I like to run in dual-head configuration (external monitor
attached) using the MergedFB options of the Radeon X driver.
This generally works well; however I'd like to be able to hot-swap monitors &
toggle at will between single-head & dual-head configuration.
Using the radeon driver's "MergedFBAuto" option works to allow X to autodetect
single/dual-head configuration when it starts up. If it starts up in
dual-head mode, setting "MetaModes" like "1024x768-1024x768 1024x768"
additionally allows me to use xrandr to dynamically switch back & forth
between single/dual-head when I plug/unplug the external monitor.
However, if no external monitor is detected when X starts up, I don't know how
to force a configuration so that when I subsequently plug in an external
monitor, I can switch over to dual-head configuration on the fly without
I imagine this must be a feature desired by many people other than just me.
Can anyone give me a hint how to set this up?
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