I waited for about a minute or so and it didnt recover. Yes there is a Unity 8 .crash file in /var/crash, I can send it if you need it. I checked all Whoopsie logs in /var/log/upstart but didnt find any OOPS that seems to be related to Unity 8, I found only one OOPS instance and it seems to be related to Gallery:
[03:36:30] Parsing /var/crash/_opt_click.ubuntu.com_com.ubuntu.gallery_2.9.1.1183_gallery-app.32011.crash. [03:36:30] Uploading /var/crash/_opt_click.ubuntu.com_com.ubuntu.gallery_2.9.1.1183_gallery-app.32011.crash. [03:36:31] Sent; server replied with: No error [03:36:31] Response code: 200 [03:36:31] Reported OOPS ID 596b2286-dbfd-11e4-b646-fa163e5bb1a2 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1440756 Title: Unity8 on the phone freezes sometimes Status in unity8 package in Ubuntu: New Bug description: Unity8/UI freezes sometimes on BQ Aquaris E4.5, happened three times since I got my phone and it seems that it always happens while browsing through open applications in the overview (the application "roll"). I am attaching the apport log for Unity8. The phone is fully up to date. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1440756/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp