Sorry for the late response, I did a fresh install of Ubuntu on my Notebook. After this my Problems where solved for a while.
However 2 days ago I connected my Notebook with our school-beamer again. After crashing my Notebook this Bug has come back again. However I cannot install your package "xserver-xorg-core" because it tries to remove every Xorg-Package on my system (when trying in synaptics) Here is the output: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: xserver-xorg-core : Depends: xserver-common (>= 2:1.13.3-0ubuntu7~lp1155136~1) but 2:1.13.3-0ubuntu6 is to be installed E: Unable to correct problems, you have held broken packages. Attached is a StackTrace of my currently bug. I hope it is the same. (The top looks like) (gdb) bt full #0 DamageRegister (pDrawable=0x0, pDamage=0x7f74d1508e80) at ../../../miext/damage/damage.c:1774 pScreen = <optimized out> pScrPriv = 0x7f74d0c7fca0 #1 0x00007f74cf28da11 in xf86RotatePrepare ( pScreen=0x7f74d0c79aa0) at ../../../../hw/xfree86/modes/xf86Rotate.c:171 crtc = 0x7f74d0c81000 pScrn = <optimized out> xf86_config = 0x7f74d0c7fca0 c = <optimized out> ** Attachment added: "x10.txt" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1155136/+attachment/3692631/+files/x10.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1155136 Title: X Server crashes after pressing [Super] + [P] in DamageRegister() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1155136/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs