Thank you very much. I had to delete the display section and restart X -- Ori Idan
On Tue, Oct 13, 2009 at 7:37 PM, Ori Berger <linux...@orib.net> wrote: > Ori Idan wrote: > >> I have an Ubuntu 9.04 laptop with Intel 945 graphics adapter. >> Desktop effects worked until this morning when I connected it to an >> external monitor. >> After disconnecting the external monitor and restarting the laptop, >> desktop effects stopped working. >> Does someone have an idea how to reenable them? >> > It's a known bug in the Intel driver: You placed the external screen to the > left/right of the laptop screen, causing the effective screen width to be > one that the Intel Driver does not support 3D acceleration for, thereby > causing compiz to turn off effects. > > If effects won't turn on, check /etc/X11.conf under section "Screen" > subsection "Display" to see it doesn't still list a too-wide screen (your > laptop is probably 1024 or 1280 pixels wide). When this happened to me, I > deleted the "Display" altogether and let Ubuntu re-figure it out itself, but > a "sudo dpkg-reconfigure xserver-xorg" might be helpful. > > And from now on, when you connect an external monitor, just be sure to > place the screen above/below the laptop screen rather than to the left/right > of it. >
_______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
