Attaching /sys/kernel/debug/dri/0/i915_error_state from immediately after the issue occured
** Attachment added: "i915_error_state.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/947543/+attachment/2819563/+files/i915_error_state.txt ** Summary changed: - Xorg freeze + Lenovo x220 froze and display went blank while switching workplaces -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/947543 Title: Lenovo x220 froze and display went blank while switching workplaces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/947543/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp