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Old 12-30-2009, 10:09 PM
Merciadri Luca
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

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Hi,

After some time, my Debian automatically locks the session, and asks
for a password.

It sometimes fails, and my keyboard becomes unresponsive. It seems to
be related to something which is the output of my dmesg:
`exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen'

There are various messages before and after it. It does not happen
often.

This URL relates the same problem as me:
http://forums.opensuse.org/hardware/64-bit/412840-keyboard-locks-randomly.html
except that I am using 32 bits, with 2.6.26-2-686-bigmem, and that,
once it has happened, every key is unresponsive on my keyboard,
particularly `Num Lock.' I have to turn the PC off in a mechanical way(!)

Is there a solution to it? I have checked the drives with various
tools, and there seems to be no problem (they are brand new).

Thanks folks.
- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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Old 12-31-2009, 01:51 AM
Stan Hoeppner
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

Merciadri Luca put forth on 12/30/2009 5:09 PM:

> Is there a solution to it? I have checked the drives with various
> tools, and there seems to be no problem (they are brand new).

That's not really much data/evidence to analyze for a solution. If this didn't
occur _before_, what has changed between _before_ and now? Always look for the
simplest solution first, using process of elimination.

If you didn't change any hardware in the system, and this lockup problem didn't
exist when you were running 2.6.24, then there may be an obscure bug in 2.6.26
that you've run into, that maybe only surfaces with a specific hardware combination.

Wild ass guess suggestion given so little to go on: if you're using a USB
keyboard, switch to a PS/2 keyboard and see if that helps. Sometimes there can
be IRQ 1 issues when using a USB keyboard due to the hub jump(s) and trickery
being performed by the system BIOS. A PS/2 KB is hard wired into the 8259 (or
equivalent) so IRQ 1 is always asserted. If the system still doesn't respond to
PS/2 KB input, then I'd hazard to say there is something wrong with your kernel,
or with your hardware.

--
Stan


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Old 12-31-2009, 07:50 AM
Merciadri Luca
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

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Thanks,

Stan Hoeppner <stan@hardwarefreak.com> writes:

> That's not really much data/evidence to analyze for a solution. If this didn't
> occur _before_, what has changed between _before_ and now? Always look for the
> simplest solution first, using process of elimination.
I know, but I do not have any other clue. Which direction should I
have to investigate in?
>
> If you didn't change any hardware in the system, and this lockup problem didn't
> exist when you were running 2.6.24, then there may be an obscure bug in 2.6.26
> that you've run into, that maybe only surfaces with a specific
> hardware combination.
I directly installed 2.6.26, and this problem happened in the very beginning.
>
> Wild ass guess suggestion given so little to go on: if you're using a USB
> keyboard, switch to a PS/2 keyboard and see if that helps. Sometimes there can
> be IRQ 1 issues when using a USB keyboard due to the hub jump(s) and trickery
> being performed by the system BIOS. A PS/2 KB is hard wired into the 8259 (or
> equivalent) so IRQ 1 is always asserted. If the system still doesn't respond to
> PS/2 KB input, then I'd hazard to say there is something wrong with your kernel,
> or with your hardware.
Unfortunately, I am using a PS/2 KB. I tried unplugging *all* the USB
stuff (thus using a mere config), and the same problem still
happens. I am not using a very complexe hardware config. I do not
understand this problem.

Thanks.

- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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Old 12-31-2009, 02:48 PM
"James Wu"
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

>It sometimes fails, and my keyboard becomes unresponsive. It seems to
be related to
>something which is the output of my dmesg:
>`exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen'

I'm wondering if it's a hard lock or a keyboard lock. Does the mouse
work when you move it around? Is it only when X is running? What
graphics card/driver to you have? Have you tried plugging in a USB
keyboard and unplugging your ps2 once it locks?

James


-----Original Message-----
From: robomod@news.nic.it [mailto:robomod@news.nic.it] On Behalf Of
Merciadri Luca
Sent: December 31, 2009 3:50 AM
To: debian-user@lists.debian.org
Subject: Re: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

Unfortunately, I am using a PS/2 KB. I tried unplugging *all* the USB
stuff (thus using a mere config), and the same problem still happens. I
am not using a very complexe hardware config. I do not understand this
problem.

Thanks.


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Old 12-31-2009, 03:48 PM
Merciadri Luca
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

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Hash: SHA1

"James Wu" <JWu@eyereturn.com> writes:

> I'm wondering if it's a hard lock or a keyboard lock. Does the mouse
> work when you move it around?
Yes, it works: clicking, moving, etc., but the keyboard won't work.

> Is it only when X is running? What
> graphics card/driver to you have?
I have a nVidia GeForce 8400 GS. I am using the CUDA driver 180.22. I
tried with newer drivers, but it has no influence.

> Have you tried plugging in a USB
> keyboard and unplugging your ps2 once it locks?
Yes, and it does not change anything.

- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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Old 12-31-2009, 04:06 PM
"James Wu"
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

Google pointed me to these, I think it's worth a try.

https://bugzilla.redhat.com/show_bug.cgi?id=462425#c80
http://forums.fedoraforum.org/showthread.php?t=213585


James


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Old 12-31-2009, 05:25 PM
Merciadri Luca
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

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Hash: SHA1

"James Wu" <JWu@eyereturn.com> writes:

> Google pointed me to these, I think it's worth a try.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=462425#c80
> http://forums.fedoraforum.org/showthread.php?t=213585
Thanks. I just re-read these links (as I had already read them before; I should
have mentioned it, sorry).

I tested a second time, and, starting with such a GRUB:

==
title Debian GNU/Linux, kernel 2.6.26-2-686-bigmem
root (hd0,4)
kernel /boot/vmlinuz-2.6.26-2-686-bigmem root=/dev/sda5 ro quiet
initrd /boot/initrd.img-2.6.26-2-686-bigmem

title Debian GNU/Linux, kernel 2.6.26-2-686-bigmem (single-user mode)
root (hd0,4)
kernel /boot/vmlinuz-2.6.26-2-686-bigmem root=/dev/sda5 ro single
initrd /boot/initrd.img-2.6.26-2-686-bigmem

title Debian GNU/Linux, kernel 2.6.26-2-686
root (hd0,4)
kernel /boot/vmlinuz-2.6.26-2-686 root=/dev/sda5 ro quiet
initrd /boot/initrd.img-2.6.26-2-686

title Debian GNU/Linux, kernel 2.6.26-2-686 (single-user mode)
root (hd0,4)
kernel /boot/vmlinuz-2.6.26-2-686 root=/dev/sda5 ro single
initrd /boot/initrd.img-2.6.26-2-686

### END DEBIAN AUTOMAGIC KERNELS LIST
==

and playing with apic and ACPI (i.e. adding `acpi=off noapic' to the
kernel options) does not solve any problem.

Any idea? :-(

Thanks.


- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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Old 01-01-2010, 01:01 AM
Stan Hoeppner
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

Merciadri Luca put forth on 12/31/2009 2:50 AM:

> Unfortunately, I am using a PS/2 KB. I tried unplugging *all* the USB
> stuff (thus using a mere config), and the same problem still
> happens. I am not using a very complexe hardware config. I do not
> understand this problem.

Can you give us a hardware dump? I.e. brand, model, vid card type, if you built
it yourself from parts, what mobo, etc? Is it a laptop or desktop?

Is it a brand new computer, or previously used to run Windows or another
iteration of Linux? Has it ever run without problems previously to installing
2.6.26?

--
Stan


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Old 01-01-2010, 08:27 AM
Merciadri Luca
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

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Hash: SHA1

Stan Hoeppner <stan@hardwarefreak.com> writes:

> Can you give us a hardware dump? I.e. brand, model, vid card type, if you built
> it yourself from parts, what mobo, etc? Is it a laptop or desktop?
For sure. It is a desktop computer. This one was built by a
professionnal, by part. I am using an ASUS P5K/EPU motherboard, with
Quad Core CPU Q9450. My vid card is a GeForce 8400 GS (rev a1).

It works correctly under Windows (there is actually a multiboot but I
do not use Windows often). It has run without problems
previously, but I did not add any new stuff to it since then.

- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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Old 01-01-2010, 10:02 AM
Stan Hoeppner
 
Default exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

Merciadri Luca put forth on 1/1/2010 3:27 AM:
> Stan Hoeppner <stan@hardwarefreak.com> writes:
>
>> Can you give us a hardware dump? I.e. brand, model, vid card type, if you built
>> it yourself from parts, what mobo, etc? Is it a laptop or desktop?
> For sure. It is a desktop computer. This one was built by a
> professionnal, by part. I am using an ASUS P5K/EPU motherboard, with
> Quad Core CPU Q9450. My vid card is a GeForce 8400 GS (rev a1).
>
> It works correctly under Windows (there is actually a multiboot but I
> do not use Windows often). It has run without problems
> previously, but I did not add any new stuff to it since then.

What keyboard layout and system language are you using? Does the KB only lock
up after a power management (i.e. sleep) event or screen saver engaging, or does
it lock up while you are typing?

--
Stan


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