Thanks for the suggestion. Unfortunately, it's at least as bad with the new kernel; maybe worse.
So first of all, "2nd login" doesn't reproduce the issue 100% reliably after all. I tested one last time with kernel 4.4.0-31, and the same exact problem occurred again, but on the 3rd, not 2nd login. I then rebooted into the new kernel 4.8.0-040800rc2, and was able to reproduce it, but it was after the 3rd *logout.* The machine froze on the black console screen that normally appears just momentarily after the desktop goes away but before the lightdm login screen reappears. After eventually regaining control, I logged in again and the display froze shortly before the desktop was completely drawn, more or less as expected. Unfortunately, this time Ctrl+Alt+F1 had no effect after any length of time. Having neglected to first install sshd, I had to hard reset the machine after 30 minutes or so of waiting. I haven't had that happen with the old kernel, but that could also just be luck. By the way, is it possible this bug should be against Xorg instead? The kernel version on my 14.04 installation is 4.4.0-34, or pretty close to the 4.4.0-31 kernel I'm having issues with. ** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612895/+attachment/4721919/+files/kern.log ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612895 Title: Display freezes on 2nd+subsequent logins To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612895/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
