2.5.14-rc1-mm1.5 - keyboard wierdness

2.5.14-rc1-mm1.5 - keyboard wierdness

[Valdis.Kletnieks]

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I've had this happen twice now, running Andrew's "not quite -mm2" patch.

Symptoms: After about 20-30 minutes uptime, a running gkrellm shows system mode
suddenly shoot up to 99-100%, and the keyboard dies.  Oddly enough, a USB mouse
continued working, and the X server was still quite responsive (I was able to
close Firefox by opening a menu with the mouse and selecting 'quit', for
example).

alt-sysrq-foo still worked, but ctl-alt-N to switch virtual consoles didn't.
sysrq-t produced a trace with nothing obviously odd - klogd, syslog, and the
disk were all working.

Nothing interesting in the syslog - no oops, bug, etc..

Another odd data point (I didn't notice if this part happened the first time):
gkrellm reported that link ppp0 had inbound packets on the modem port of a
Xircom ethernet/modem combo card.  At the rate of 3.5M/second - a neat trick
for a 56K modem.  When I unplugged the RJ-11, gkrellm *kept* reporting the
inbound traffic.  When I ejected the card, *then* the ppp0 (and the alleged
inbound packets) stopped - but still sitting at 99% system and no keyboard.

This ring any bells?  Any suggestions for instrumentation to help debug this?

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Re: 2.5.14-rc1-mm1.5 - keyboard wierdness

[Dmitry Torokhov]

On Wednesday 21 September 2005 22:35, Valdis.Kletnieks@vt.edu wrote:
> I've had this happen twice now, running Andrew's "not quite -mm2" patch.
> 
> Symptoms: After about 20-30 minutes uptime, a running gkrellm shows system mode
> suddenly shoot up to 99-100%, and the keyboard dies.  Oddly enough, a USB mouse
> continued working, and the X server was still quite responsive (I was able to
> close Firefox by opening a menu with the mouse and selecting 'quit', for
> example).
> 
> alt-sysrq-foo still worked, but ctl-alt-N to switch virtual consoles didn't.
> sysrq-t produced a trace with nothing obviously odd - klogd, syslog, and the
> disk were all working.
> 
> Nothing interesting in the syslog - no oops, bug, etc..
> 
> Another odd data point (I didn't notice if this part happened the first time):
> gkrellm reported that link ppp0 had inbound packets on the modem port of a
> Xircom ethernet/modem combo card.  At the rate of 3.5M/second - a neat trick
> for a 56K modem.  When I unplugged the RJ-11, gkrellm *kept* reporting the
> inbound traffic.  When I ejected the card, *then* the ppp0 (and the alleged
> inbound packets) stopped - but still sitting at 99% system and no keyboard.
> 
> This ring any bells?  Any suggestions for instrumentation to help debug this?
> 

I have seen this couple of times when I would eject my prism54 card at
a "bad" time - my card sometimes gets stuck (a known problem with some
prism54 cards) and if I would eject it "too early" I would lose keyboard.
So I wait till it complain: 

	prism54: Your card/socket may be faulty, or IRQ line too busy :(

and eject and insert it again and all is fine.

-- 
Dmitry

Re: 2.5.14-rc1-mm1.5 - keyboard wierdness

[Valdis.Kletnieks]

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On Wed, 21 Sep 2005 23:00:17 CDT, Dmitry Torokhov said:

> I have seen this couple of times when I would eject my prism54 card at
> a "bad" time - my card sometimes gets stuck (a known problem with some
> prism54 cards) and if I would eject it "too early" I would lose keyboard.
> So I wait till it complain: 
> 
> 	prism54: Your card/socket may be faulty, or IRQ line too busy :(
> 
> and eject and insert it again and all is fine.

Hmm.. the wireless card in this is (a) an Orinoco and (b) not ejectable, as
it's a built-in, and (c) wasn't even in use at the time...

i8042 is on IRQ1, and the warp-drive modem is on IRQ11.  And the USB that had
the still-working mouse is on IRQ11 too.

Anybody got a better idea than running a cronjob every 5 mins that runs
oprofile for 1 minute, and dumping the stats, and waiting for it to hit again?

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