How to investigate system hangs?
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I am running wheezy. It worked perfectly for a year or two.
But yesterday (and today again) my system got deadlocked. I'm not sure
where to look for causes.
Both events went like this:
* I open the lid, the system resumes
* I enter the password, I get applications apparently working
* after short time, like few mouse clicks, everything becomes unresponsive
* the mouse cursor can move
* the system is still able to log USB mouse plug event, however the
plugged mouse is apparently not listened to
* ctrl+alt+f1 doesn't bring me a terminal (even after SysRq+R)
* SysRq commands are logged and executed, so I can reboot with it
I have looked at nearly everything at /var/log, but I see nothing
suspiscious for my untrained eye.
May I ask some advice? Do you know of some recent major changes that
would e.g. affect some WiFi operation or something else that activates
few seconds after system resume?
How do I check what package upgrades preceded the hangs?
Dawid
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