Mathieu R. wrote:
whoho! you're right : it work now well, even with my distro's packages!
It would be good to know exactly what happens between these two situations (ie. before you do a "xrandr --output VGA1 --right-of LVDS1 --auto"). Does dispwin exit with the xcb assert ? Does it do this when selecting the built in display ? Does it do this when selecting the external ? Does it do this no mater what display is/is not selected ? (ie. I'm trying to figure out if XRandR is playing up here.) The xcb assert appears to be due to a bug in the X11 server - it appears that XRRGetCrtcGamma() doesn't respond to an X error correctly, triggering the xcb assert. Graeme Gill.