I was able to reproduce this problem pretty easily using the method described here: https://bugs.launchpad.net/ubuntu/+source/nspluginwrapper/+bug/241145
It *seemed* to only happen with the flashplugin-nonfree package installed. I added 'Option "XaaNoOffscreenPixmaps"' to my xorg.conf file and I HAVE NOT been able to reproduce this issue. It seems to have solved the issue I was having that looked similar to this. My configuration: Hardy (AMD64) fglrx (latest ubuntu package) flashplugin-nonfree compiz enabled Here's the Xorg.0.log I was getting previously: Backtrace: 0: /usr/bin/X(xf86SigHandler+0x6a) [0x48402a] 1: /lib/libc.so.6 [0x7f8e32203100] 2: /usr/lib/xorg/modules//libxaa.so [0x7f8e2f772c9c] 3: /usr/lib/xorg/modules//libxaa.so [0x7f8e2f772e96] 4: /usr/bin/X [0x527ea2] 5: /usr/bin/X [0x515c3f] 6: /usr/bin/X(Dispatch+0x2ef) [0x44eaaf] 7: /usr/bin/X(main+0x47d) [0x436b9d] 8: /lib/libc.so.6(__libc_start_main+0xf4) [0x7f8e321ef1c4] 9: /usr/bin/X(FontFileCompleteXLFD+0x279) [0x435ed9] Fatal server error: Caught signal 11. Server aborting (II) AIGLX: Suspending AIGLX clients for VT switch -- Xorg crashes with /usr/bin/X(FontFileCompleteXLFD+0x1e1) https://bugs.launchpad.net/bugs/165093 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs