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#1 2016-06-22 12:01:03

oxygen_wobble
Member
Registered: 2012-05-20
Posts: 73

Possibly causes for random system freezes ?

#i,

two days ago i reinstalled my arch system on my Laptop (Lenovo T440s).

Now i'm experiencing random system freezes, and i don't have a clue what might cause them.

Symptoms:
- System freezes without any load, just Xserver with Awesome and Emacs or the like running.
- CPU Temperature is normal or lower than average (i'm constantly monitoring, during the last freeze it showed 38°).
- Can't change to Vconsole
- Magic SysRq keys don't work

Vague ideas for causes:
- powertop ?
I optimized the system for log battery live, and i've used 'powertop --auto-tune' successfully on the previous installation,
so i'd wonder why this should freeze my system now ...
- thinkfan ? But i think it freezed before i enabled this as well ...
- i've tried the iwlwifi powersave options, but i've already disabled them ...
(as descibed here: https://wiki.archlinux.org/index.php/Po … wlwifi.29)
- disabled ethernet module (e1000e) or bluetooth ?

Anybody got a hint how to find more clues ?

Regards,
n

Last edited by oxygen_wobble (2016-06-22 12:02:41)

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#2 2016-06-22 13:36:01

oxygen_wobble
Member
Registered: 2012-05-20
Posts: 73

Re: Possibly causes for random system freezes ?

Could it be memory-related?

dmesg shows several messages like this:

 [mem 0x00000000-0x00000fff] could not be reserved

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#3 2016-06-22 14:56:30

ooo
Member
Registered: 2013-04-10
Posts: 1,631

Re: Possibly causes for random system freezes ?

try if the issue persists with linux-lts kernel.

EDIT: if you're suspecting your RAM (or some other hardware piece) could be faulty, try running memtest

Last edited by ooo (2016-06-22 14:57:38)

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#4 2016-06-26 16:03:58

oxygen_wobble
Member
Registered: 2012-05-20
Posts: 73

Re: Possibly causes for random system freezes ?

Hm, so for now i downgraded  the kernel to the last 4.5.x version, no more problems with freezes ... so yeah, i might try the LTS version ...

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