I'm assuming it's a kernel regression so identifying which kernel version it started in would be most useful:
https://kernel.ubuntu.com/mainline/?C=M;O=D ** Summary changed: - Thinkpad x201 having issues without nomodeset + [i915] Thinkpad X201 (Arrandale) screen freezes ** Summary changed: - [i915] Thinkpad X201 (Arrandale) screen freezes + [i915] ThinkPad X201 (Arrandale) screen freezes ** Tags added: i915 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2084055 Title: [i915] ThinkPad X201 (Arrandale) screen freezes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2084055/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
