I had the same problem on Ubuntu 14.04 64-bit. I've attached the crash report. Thanks.
** Attachment added: "xorg_crash.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1509507/+attachment/4516303/+files/xorg_crash.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1509507 Title: berkeley pacman crashes xorg To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1509507/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp