[ltp] Re: BUG: soft lockup - CPU#0 stuck for 61s!

[Pio Bättig]

Hi,

I have a T61 with a T7100 (1.8 GHz) Core 2 Duo and 4 GB of memory, 
Centrino Duo chipset (Intel Graphics, Network,....)
Since (at least) 2.6.27.5-117.fc10.x86_64 I also observe frequent lockups.
I can work for anything between 15 minutes to several hours, and then 
suddenly, the system starts behaving jerkily (mouse pointer, loading 
applications.....).
The CPU-applet gets stuck at 1.8 GHz. However when checking with "top", 
the CPU utilization stays at around 1-5 percent if I don't do anything 
on the system, it doesn't seem to go to 50/100 percent which could 
explain the freezing.

If these lockups happen, a graceful shutdown is not possible anymore, 
the system gets stuck somewhere in the process.
(BTW: is there a possibility to have the shutdown messages added to 
/var/log/messages or some other logfile?,  I don't see them recorded 
anywhere, only boot-messages.)

This behavior starts to get quite annoying, as it happens on a daily 
basis and not occasionally. At first, I suspected the desktop-effects, 
as they gave me trouble under fedora 9, but switching them off didn't 
get rid of the lockups.

Best regards,

Pio



Tino Keitel wrote:
| On Sat, Feb 07, 2009 at 20:26:29 +1100, D. Sen wrote:
|> -----BEGIN PGP SIGNED MESSAGE-----
|> Hash: SHA1
|>
|> Anyone noticed this on their syslog? It appears whenever I am trying to
|> backup my hard drive to an external drive (USB or ESATA). It freezes the
|> computer requiring a hard reboot.
|>
|> Very annoying. Googling results in various hits - but nothing definite.
|
| I saw such hangs with recent versions of the Intel driver (2.6.1) with
| kernel mode setting enabled in the kernel.