I've been battling with this issue for a weeks now as well. Thought it was faulty hardware, but it only occurs when I do a warm reboot into my Linux system.
MSI z97 gaming 7 4.2.0-19-generic I'm going to install 4.2.0-27 now and post any updates if it was resolved. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437492 Title: boot stalls on USB detection errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1437492/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs