This bug is missing log files that will aid in diagnosing the problem. >From a terminal window please run:
apport-collect 1680502 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1680502 Title: Hang after upgrade to 16.04 Status in linux package in Ubuntu: Incomplete Bug description: Last week I upgraded from 12.04 LTS to 14.04 LTS and then immediately to 16.04 LTS. 12.04 was not entirely stable; something was crashing regularly, and the Ubuntu tools make it hard for a user to determine what. The upgrade went moderately well; I now get error messages during system startup (about an unnamed file not being found) and a couple of other bits of flakiness, but I counted it as a success and the system as functional. This morning I tried to wake up my screen, and nothing much happened. I then attempted to ssh to the ubuntu box from another system. This requested my password almost instantly, as normal - but then nothing else happened, and the connection eventually dropped. I conclude that IP and TCP are functional, and it's possible for some processes to respond, but not many. So it's not a complete kernel hang. (In particular, I'm seeing evidence that it's getting beyond things done at interrupt level.) I don't have any debugging aids installed, so I don't believe I can get a kernel crash dump, which is what I'd want if I were debugging this. I *can* potentially retrieve and attach logs, but you'll have to tell me which ones are relevant, and do so before they rollover. (Also, logging will have to be functioning; IIRC, there were syslog issues in 12.04, and while I'd implemented whatever fix was reccommended at the time, I haven't looked at my logs since the upgrade.) This is a desk top system originally from System 76 - i.e. built for linux - that's also running a bunch of server software (postfix, apache, ...) I was not (knowingly) running anythign unusual at the time - probably Unity, a few shells, firefox, maybe guncash and/or emacs - and all the usual demons. IIRC, I was not at the very latest versions of all software installed - some new versions ahd come out since I upgraded, and I was going to deal with installing them on the weekend. I'm going to hard reboot the system now. I can then gather identifying info. If I have time this AM before work, I'll check for standard things you want in all bugs, and add them. (Right now I'm posting from my Mac laptop ;-)) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680502/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp