This seems to be a firmware / hardware issue with Dell Laptops - the BIOS reports "ASF2 force off" events when these shutdown happens, which is a problem experienced by many other Dell customers, as can be seen here - http://en.community.dell.com/support- forums/laptop/f/3518/t/19612919 - and several other Dell community forum posts.
I've closed this ticket as invalid. ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1422283 Title: [Dell Inc. Latitude E5440] suspend/resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1422283/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs