[ltp] Radeon: hot-swap VGA-out monitor

[Andrey Kislyuk]

> Andrey, do you have any idea how the monitor hotplug works in Xorg 7.3?  I 
> read the release notes, which say that this functionality is implemented by 
> xrandr 1.2; however, I already have xrandr 1.2.0 installed on my machine, so 
> I'm not sure it will give me anything I don't already have.
>   
You need not only xrandr 1.2, but also >=libxrandr-1.2.1, 
xorg-server-1.3, libdrm-git, and xf86-video-ati-git. (These are now out 
as part of xorg 7.3.) The easiest way I've found to use display hotplug 
is to run randr --auto when adding or removing a display, and configure 
the resolution of each output. This can be completely automated in a 
udev rule, but I haven't seen one yet.

-ak