@Saad try this: $ echo 1|sudo tee -a /sys/module/i915/parameters/semaphores
and see if it helps (it seems to help for some). Of course you have to do it after reboots if you don't like the idea of modifying your grub config. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780053 Title: system freezes randomly -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs