I don’t think this is an Ubuntu bug, but I’ll add my observations anyway for anyone who might Duck Duck Go this ticket in an effort to find out what’s happening to their computer.
I have a ThinkPad X200s, and the issue was originally just that upon entering into suspend, the computer would restart—unfortunately (or even more so) only a few seconds or minutes after the suspend actually succeeded, so that my laptop booted in the backpack several times. It has survived that though. More recently it began to restart spontaneously. I didn’t make the connection with the power supply, but in retrospect it does seem like it only happens when I’m at the university or at friends’ places where I unplug the AC from time to time. Most of the time I work at home with AC plugged in all the time, and then the problem never occurs. It may also be possible that it occurs a while after moving the laptop about (the acceleration sensors might pick up on that), but the AC theory seems more likely to me. I don’t think it’s heat-related; the CPU was mostly idling when it happened the last couple of times. What I also observed is that after the most recent crash, the syslog and kern.log files were filled with lots of null bytes at the time of the crash. Otherwise they didn’t reveal anything insightful to me. I just cleaned the interior of the laptop and reset the BIOS defaults. If that doesn’t help, I’ll update the BIOS, but the change log didn’t look like they fixed any issue similar to this one. The reason I don’t think it’s Ubuntu-related is that I installed a Debian a few days ago to convert it into an LMDE (because the LMDE installer doesn’t support full disk encryption), but the problem persists. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1176122 Title: computer randomly restarts when ac power adapter is used. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1176122/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
