Package: base
Severity: critical
Justification: breaks unrelated software

Fore about 6 weeks I am suffering from crashes under Debian Lenny on my Samsung 
X20 notebook.

When the system crashes two monochrome pixel patterns are displayed by turns 
with a frequency of about 1/2 second. The majority of such a pattern is black 
with brighter, noisy bunches with a grating of approximately the size of a 
character on the tty's. The screen resolution seams to be 640x480 at that time.
Directly after the crash the hard disk LED glows, but after a short time it 
turns off and the hard drive spins down.
The notebook does not respond to anything, no response to keyboard (not even 
the keyboard LEDs), no ping answers - nothing.

After a hard reset upon boot the machine complains about not unmounted ext3 
partitions but has always recovered just fine.

The crashes occur only in the following situations:

1) During logout before gdb should be visible again.

2) On shutdown, approximately at that time at which normally the screen turns 
black for a moment before the firs shutdown messages are displayed.

3) On suspend to ram/disk. I even had a crash during a suspend to ram from 
single user mode without a running x-server.

The crash occurs approximately every 4th to 6th time one of the above 
"critical" actions is performed.
I found no way to reproduce the crash reliably.

I experienced crashes with both the 2.6.18 and 2.6.21 stock kernels an several 
custom made 2.6.21 kernels both worked fine before.

A hardware Problem can be excluded. I checked the memory and hard disk 
extensively and the systems works flawless even under high stress. Moreover I 
found an other user in a German Debian community 
(http://www.debianforum.de/forum/viewtopic.php?t=89507) experiencing the same 
problem on the same notebook.

As far as I can tell the log-files unfortunately do not contain any useful 
information.


-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.21cg06
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash



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