*** This bug is a duplicate of bug 774978 *** https://bugs.launchpad.net/bugs/774978
I have been experiencing this as well. For me, it was sometimes random, but it always occurred when I loaded up Calibre and tried to click on an ebook. Taking nsanz.cl's advice, I disabled some effects. Calibre no longer crashes X immediately every time (it used to). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780358 Title: Random X crashes in Ubuntu 11.04 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs