You have been subscribed to a public bug: Intermittent issue, sometimes forces hard reset.
In trying to determine what was happening, I installed netconsole per https://wiki.ubuntu.com/Kernel/Netconsole I have captured the log files per https://wiki.ubuntu.com/DebuggingKernelOops I note that in the dmesg output there is a message for the USB subsystem immediately before the issue, I have a MCE Remote connected via a pair of baluns over a 30m cat5 cable. I used to get a lot of messages about EFI, like: [57844.664077] hub 4-0:1.0: port 2 disabled by hub (EMI?), re-enabling... [57844.664090] usb 4-2: USB disconnect, device number 2 and sometimes the system would lock up. I changed the cabling over to cat7 and grounded the shield on the PC chassis and the issue now only occures occasionally, but this should cause a kernel oops! Thanks, Douglas ** Affects: ubuntu Importance: Undecided Status: New -- BUG: unable to handle kernel NULL pointer dereference at 00000000 00000050 https://bugs.launchpad.net/bugs/965664 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
