APM/DPMS lockup on Dell 3800

APM/DPMS lockup on Dell 3800

[David Feuer]

I get this problem both in Linux and Windows, so I won't
rule out hardware/bios bugs, but I find that often when my
monitor (backlight) gets turned off automatically after a
long period of non-use, the computer freezes up.  I think it
only happens when I've left it that way for a long time,
though.  If I move the mouse immediately after the screen is
blacked, I have no trouble, but if I leave it for a long
time, when I get back the monitor won't unblack,
ctrl-alt-backspace does nothing, ctrl-alt-delete does
nothing,  Fn-Suspend, Fn-A don't do anything, and the
capslock and numlock keys don't do anything either.  I
haven't tried reaching the machine from outside yet, but I
will if someone wants.  Possibly useful note: when the
computer is in this state and I remove the (PCMCIA) network
card and re-insert it, it does not get reset.  This could
indicate a complete lockup.

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Re: APM/DPMS lockup on Dell 3800

[David Feuer]

>

By the way, I now checked the syslog, and I see that the last cron message
was logged about an hour before I reset the system.  So it looks like a total
lockup.


BTW, what does it mean when this gets logged?

Dec 17 19:01:09 localhost kernel: eth0: Resetting the Tx ring pointer.
Dec 17 19:01:09 localhost kernel: eth0: Tx Ring full, refusing to send
buffer.


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Re: APM/DPMS lockup on Dell 3800

[Mikael Djurfeldt]

David Feuer <David_Feuer@brown.edu> writes:

> I get this problem both in Linux and Windows, so I won't
> rule out hardware/bios bugs, but I find that often when my
> monitor (backlight) gets turned off automatically after a
> long period of non-use, the computer freezes up.  I think it
> only happens when I've left it that way for a long time,
> though.  If I move the mouse immediately after the screen is
> blacked, I have no trouble, but if I leave it for a long
> time, when I get back the monitor won't unblack,
> ctrl-alt-backspace does nothing, ctrl-alt-delete does
> nothing,  Fn-Suspend, Fn-A don't do anything, and the
> capslock and numlock keys don't do anything either.  I
> haven't tried reaching the machine from outside yet, but I
> will if someone wants.

I have a Dell Inspiron 7000 with BIOS A15 and exactly the same
problem.

(I last observed this problem using linux-2.4.0-test12, though.
Now I'm running test13-pre3 and it has not yet occurred.)
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Re: APM/DPMS lockup on Dell 3800

[David Feuer]

Dagnabbit.  I forgot to give my kernel version, and now I'm booted into 
Windows, and can't remember it.  It's some 2.2 kernel: whatever comes with 
Mandrake 7.2.

At 07:14 AM 12/18/2000 +0100, you wrote:
><snip>
>
>I have a Dell Inspiron 7000 with BIOS A15 and exactly the same
>problem.
>
>(I last observed this problem using linux-2.4.0-test12, though.
>Now I'm running test13-pre3 and it has not yet occurred.)
>-


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Open Source: Think locally; act globally.
David Feuer
David_Feuer@brown.edu

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Re: APM/DPMS lockup on Dell 3800

[Andrew McNabb]

This is a problem with the 3Com Ethernet card in your system.
There are annoying problems when you try to use this card on
a network with a lot of collisions.


On Mon, 18 Dec 2000, David Feuer wrote:

> BTW, what does it mean when this gets logged?
> 
> Dec 17 19:01:09 localhost kernel: eth0: Resetting the Tx ring pointer.
> Dec 17 19:01:09 localhost kernel: eth0: Tx Ring full, refusing to send
> buffer.
> 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> Please read the FAQ at http://www.tux.org/lkml/
> 


--
Andrew McNabb
amcnabb@mcnabbs.org
http://www.mcnabbs.org/

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