On Mon, 24 Sep 2018 17:17:28 +0300 Selim T. Erdoğan <se...@alumni.cs.utexas.edu> wrote:
> On Sat, Sep 22, 2018 at 10:51:27PM -0400, Celejar wrote: > > > > I've been experiencing a great deal of frustration recently with > > intermittent freezes / crashes on my Debian Sid system (a Lenovo > > W550s). The symptoms are that the screen totally freezes and the system > > becomes completely unresponsive (even ssh attempts from another machine > > fail), and the only thing that seems to have any effect is a hard > > reboot (holding down the power button until the system restarts). > > > > Upon reboot, I can't find anything at all interesting in 'journalctl -b > > -1', or /var/log/syslog - the former just shows everything looking > > normal until the moment of the crash, at which point the log just ends, > > and the latter also just shows everything seeming to be fine until the > > moment of the crash, and then shows the boot messages from the reboot. > > > > Any ideas of what could be causing this, or how I could go about > > debugging it? I've been using this machine for years without > > experiencing anything like this, and I'm not sure for how long this has > > been a problem. I did recently upgrade from stable to unstable, but I'm > > not sure whether or not the problem's initial occurences coincide with > > the upgrade. > > > How long have you waited before you reboot? I occasionally (pretty > rarely, thankfully) get freezes on my Lenovo T400 running Debian 9 > Stretch (stable) and I used to think I would have to hard reboot it > like you do, but I noticed that they actually get fixed if I wait up to > a few minutes. Never timed them but the longest probably lasted more > than five minutes. Usually they're less than a minute. I don't usually (if ever) wait that long. If it happens again, I'll try to wait it out a bit longer and see what happens. > When these freezes happen, it seems it is relatively soon after starting > to use the laptop after it's been suspended overnight or so. They're > rare, though. I didn't try ssh'ing at the time but everything is > completely frozen. And finally, these freezes didn't use to happen a > year ago or earlier but it's been at least a few months that this has > been going on. > > Your machine and Debian version seem much newer but I thought I'd share > my experience. Thanks - I just wish I understood what the problem is, how to diagnose it properly, and even more importantly, how to fix it. Celejar
