I've also just now experience this error when starting a video in Firefox (right after the ad started to display, the whole desktop froze, only the mouse could be moved. No ALT+F1 combo etc). However, I could log in via ssh. The hard drive LED stood on for a good while after the freeze occurred. The error is very inconsistent.
** Attachment added: "deskcrash.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1674838/+attachment/4867988/+files/deskcrash.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1674838 Title: kernel BUG at /build/linux- 7LGLH_/linux-4.10.0/include/linux/swapops.h:129 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1674838/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs