Nicolas Jungers, to advise, you don't have to apport-collect further unless specifically requested to do so (also, it doesn't provide any useful data when you are booted into a mainline kernel).
Despite this, have you had a chance to review the dmesg.log? ** Attachment removed: "ProcEnviron.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1406810/+attachment/4751582/+files/ProcEnviron.txt ** Attachment removed: "JournalErrors.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1406810/+attachment/4751581/+files/JournalErrors.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1406810 Title: [iMac11,1] Unable to boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1406810/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs