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-   -   Bug#496967: general: System completely blocks any input (http://www.linux-archive.org/debian-development/150525-bug-496967-general-system-completely-blocks-any-input.html)

Frank Küster 08-28-2008 08:41 PM

Bug#496967: general: System completely blocks any input
 
Package: general
Severity: grave

Since late last week, my system completely hangs - it stops accepting
any input from keyboard or mouse - after 3 to 5 minutes after booting.
This happens both in a text console and when running X.

Of course I suspected a hardware problem first, but the manufacturers
test program (a version of "PC doctor" for IBM Thinkpads) gives no
errors at all, and does not result in hanging even after more than an
hour. Similarly, I can boot from a Knoppix CD and run it happily for
hours.

Therefore, it seems to me that it is a problem with the Debian
installation, a quite up-to-date testing. There were no log messages at
all in syslog, messages, or kern.log which point to a cause. I tried
with the current lenny kernel (2.6.26, I think) and the previous one
(2.6.25), and there was no difference - so it is probably not the
kernel.

I have no idea how I can access the LVM volumes on the harddrive,
therefore I have a hard time presenting details from logs. I will try to
copy interesting things (like dpkg.log) to /boot which is not on LVM.

Don't delay lenny's release because of this - but in case this is
actually a grave bug, I think I'd rather report it now than complain
later...

Regards, Frank


-- System Information:
Debian Release: 4.0
Architecture: i386 (i686)
Shell: /bin/sh linked to /UNIONFS/bin/bash
Kernel: Linux 2.6.19
Locale: LANG=de_DE@euro, LC_CTYPE=de_DE@euro (charmap=ISO-8859-15) (ignored: LC_ALL set to de_DE@euro)



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Frank Küster 08-29-2008 05:51 PM

Bug#496967: general: System completely blocks any input
 
Hi,

Am 28.08.2008 um 22:41 schrieb Frank Küster:


Package: general
Severity: grave

Since late last week, my system completely hangs - it stops accepting
any input from keyboard or mouse - after 3 to 5 minutes after booting.
This happens both in a text console and when running X.


I should have been more specific here. It's not only the input, it's
the output as well. For example, if aptitude is downloading packages
in an rxvt window, the percent count stops changing as well, the
display is also frozen.


Any (ethernet) network also seems to stop: It no longer answers to
pings, and a remote ssh login stops working, too.


Any ideas how I can start debugging this?

Regards, Frank




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Lars Wirzenius 08-29-2008 06:20 PM

Bug#496967: general: System completely blocks any input
 
pe, 2008-08-29 kello 19:51 +0200, Frank Küster kirjoitti:
> Any ideas how I can start debugging this?

My first suspicion would be about the hardware. You could run memtest86+
for at least 12 hours or until the first error.

Another idea: you could test the system with another version of Debian,
or with Ubuntu, Knoppix, or another live CD, and see if you can
reproduce the problem with that.





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Lawrence Williams 08-29-2008 06:23 PM

Bug#496967: general: System completely blocks any input
 
This sounds like a kernel panic to me. Anyone else have any thoughts?

- Lawrence

On Friday, August 29, 2008 03:21:13 pm Frank Küster wrote:
> I should have been more specific here. It's not only the input, it's *
> the output as well. For example, if aptitude is downloading packages *
> in an rxvt window, the percent count stops changing as well, the *
> display is also frozen.





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Felix Zielcke 08-29-2008 06:42 PM

Bug#496967: general: System completely blocks any input
 
Hello,

Am Freitag, den 29.08.2008, 19:51 +0200 schrieb Frank Küster:

> > Since late last week, my system completely hangs - it stops accepting
> > any input from keyboard or mouse - after 3 to 5 minutes after booting.
> > This happens both in a text console and when running X.
>
> I should have been more specific here. It's not only the input, it's
> the output as well. For example, if aptitude is downloading packages
> in an rxvt window, the percent count stops changing as well, the
> display is also frozen.

I noticed something similiar, with the VMware Workstation 6.5 Beta
I thought this was just a bug in the beta but maybe it's somewhere in
Debian.

For example sometimes I just rsync a whole system to another one.
and then it seems to hang like you experience it.
But if I then just hide the window and unhide it again, then it get's
updated once.
I had to do it a few times to check if rsync was finished or not.
So the system was still running it was just the graphic output in my
case which wasn't updated.

> Any (ethernet) network also seems to stop: It no longer answers to
> pings, and a remote ssh login stops working, too.

Hm unfortunately I don't know if in my case the network still worked or
not.
If it happens again for me I try to find more about it.

On my native real Debian sid/experimental system I hadn't this problem
yet.

--
Felix Zielcke




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gregor herrmann 08-29-2008 09:51 PM

Bug#496967: general: System completely blocks any input
 
On Fri, 29 Aug 2008 19:51:13 +0200, Frank Küster wrote:

> Any ideas how I can start debugging this?

I had something similar a few months ago, and it was related to the
kernel's clocksource setting.
But that was with 2.6.21 and 2.6.22, so probably doesn't apply here.

Cheers,
gregor
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Frank Küster 08-30-2008 10:21 AM

Bug#496967: general: System completely blocks any input
 
Hi,

Am 29.08.2008 um 20:20 schrieb Lars Wirzenius:


pe, 2008-08-29 kello 19:51 +0200, Frank Küster kirjoitti:

Any ideas how I can start debugging this?


My first suspicion would be about the hardware.


Mine too.



You could run memtest86+
for at least 12 hours or until the first error.


Can I download an iso image of a boot CD with memtest86+ somewhere? I
have only this single Linux machine at the moment, and there's no
chance at all that the machine works long enough that I am able to
install the package and understand how to create an image.


Another idea: you could test the system with another version of
Debian,

or with Ubuntu, Knoppix, or another live CD, and see if you can
reproduce the problem with that.


That's exactly what I did and why I am reporting this as a Debian
bug: It never occurred when booting from a Knoppix CD, even after hours.


The only thing that is different hardware-wise is that the harddisk
is mostly inactive in Knoppix.


Is there any live system available which can handle lvm volumes? I
think I even have some free disk space for an additional partition to
install the live system on harddisk. But I cannot access it from
Knoppix, and didn't find information on lvm in the Knoppix FAQ.


TIA, Frank


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Stepan Golosunov 08-30-2008 11:08 AM

Bug#496967: general: System completely blocks any input
 
29.08.2008 в 19:51:13 +0200 Frank Küster написал:
> Am 28.08.2008 um 22:41 schrieb Frank Küster:
>> Package: general
>> Severity: grave
>>
>> Since late last week, my system completely hangs - it stops accepting
>> any input from keyboard or mouse - after 3 to 5 minutes after booting.
>> This happens both in a text console and when running X.
>
> I should have been more specific here. It's not only the input, it's the
> output as well. For example, if aptitude is downloading packages in an
> rxvt window, the percent count stops changing as well, the display is
> also frozen.
>
> Any (ethernet) network also seems to stop: It no longer answers to
> pings, and a remote ssh login stops working, too.
>
> Any ideas how I can start debugging this?

Looks similar to #479709, which happens with linux 2.6.25/2.6.26 but not
2.6.24 and seems to be provoked by chrony.



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Frank Küster 08-30-2008 12:26 PM

Bug#496967: general: System completely blocks any input
 
Hi,

Am 29.08.2008 um 23:44 schrieb J.A. Bezemer:


Boot with "init=/bin/sh" and wait. Still hangs? -> kernel or hardware
problem.


It didn't hang for nearly an hour, and now again with the first
couple of scripts in /etc/rcS.d executed it is running for 20
minutes. I'll give it 15 minutes after each change and then try the
next couple of scripts.


By the way, is there a possibility to stop a process in /bin/sh? I
executed "while true; do uptime; sleep 10; done" and couldn't stop it
with Ctrl+c. I invoked bash as a workaround.



Open case and put a big fan in front.
Replace power supply.



It's a laptop, and the sensors didn't report anything suspicious. It
hangs with battery only and with external power only, that doesn't
matter.


Thanks for the hints (strange how one is completely devoid of ideas
when it's one's one machine...)


Regards, Frank



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Lars Wirzenius 08-30-2008 12:54 PM

Bug#496967: general: System completely blocks any input
 
la, 2008-08-30 kello 12:21 +0200, Frank Küster kirjoitti:
> Can I download an iso image of a boot CD with memtest86+ somewhere?

Do the Debian installer disks have that? I know that the Ubuntu ones do.
(If the Debian ones don't, that would be a good wishlist bug to file, I
think.)

The Ubuntu live CD should also have the LVM tools and allow you to
handle your LVM volumes, from the command line at least.





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