Can you please run apport-collect 555503 to attach your logs to this bug? Also, can you try booting with i915.powersave=0 added to grub to see if it fixes your problem?
Can you please run apport-collect 555503 to attach your logs to this bug? Also, can you try booting with i915.powersave=0 added to grub to see if it fixes your problem?