On Fri, 2016-05-06 at 21:02 -0500, Seb wrote: > I suspect this will go up into the ether, but just in case someone > has > experience with this kind of bug, I'll try because even a tip on how > to > debug it and narrow down the problem would be helpful. > > For a few weeks, I'm experiencing complete system freezes that occur > nearly every day and seemingly at random or not linked to any easily > identifiable activity. This is a new system (Lenovo ThinkCentre > M800), > so I doubt hardware is the culprit. Checking the output of dmesg, > and > looking at /var/log/kern.log or /var/log/syslog shows soft or hard > lockups (excerpt of a hard lockup example): Yeah, hard crashes sucks. Are all the logs similar? The call trace in that log seems very short. Is this a new install or did you have a previous working setup? Trying newer and older kernels is probably a good first step. If a newer kernel works the problem has already been fixed. If an older kernel works it's a regression and you, or someone else, can bisect it. You might want to run through a full test of Memtest86+ a couple of times, just to rule out hardware problems even though it's unlikely. You might also want to removing as many variables as possible. Try with a minimum system. Eg. you have nouveau, so try without it and just the internal GPU, try without wifi, without network cable plugged in etc. Filing a bug is probably a good idea, preferably directly upstream: https://bugzilla.kernel.org/ -- Cheers, Sven Arvidsson http://www.whiz.se PGP Key ID 6FAB5CD5
Attachment:
signature.asc
Description: This is a digitally signed message part