Apparently disabling boot splash by removing "splash" from the kernel commandline is also a workaround for this issue. So I to not thnik it is a kernel-issue anymore. So I changed it to nvidia-current because both linux-image and nvidia-current had been was upgraded prior.
** Package changed: linux (Ubuntu) => nvidia-graphics-drivers (Ubuntu) -- Xorg fails with "NVIDIA(0): Failed to allocate primary buffer: out of memory." https://bugs.launchpad.net/bugs/607490 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