On Wed, Nov 4, 2009 at 4:36 AM, Mathieu R. <mathieu@xxxxxxxxxxx> wrote: > Le mercredi 04 novembre 2009 à 19:30 +1100, Graeme Gill a écrit : >> On Tue, Nov 3, 2009 at 9:08 PM, Graeme Gill <graeme2@xxxxxxxxxxxxx> wrote: >> > % dispcal -v -q l -y l test >> > dispcal: ../../src/xcb_io.c:542: _XRead: Assertion >> > `dpy->xcb->reply_data != ((void *)0)' failed. >> > zsh: abort (core dumped) dispcal -v -q l -y l test FWIW, I've seen this a few times (with dispwin, not dispcal). I think it happens when I hotplug a new display but don't configure it. That is: 1. Start with only laptop panel connected. dispwin works. 2. Plug in VGA cable. dispwin fails. 3. xrandr --output VGA1 --right-of LVDS1 --auto. dispwin works again. I can't test that right now (no monitor to hotplug), but I can give it a try later on at work. --Andy