Re: [LAU] Hard lock-ups -- Trying to narrow the cause

Seems to be a well known bug in Ubuntu Jaunty! See these threads

http://ubuntuforums.org/showthread.php?t=1135055
https://bugs.launchpad.net/ubuntu/%2Bsource/linux/%2Bbug/355155
https://bugs.launchpad.net/ubuntu/%2Bsource/linux/%2Bbug/375986

a lot to read. I solved my problem be recompiling kernel 2.6.27 (see here for
a guide http://ubuntuforums.org/showthread.php?t=311158 ) but had yet no luck
to do the same with the real time kernel from Jaunty.

Gerhard

On Friday 22 May 2009, Darren Landrum wrote:
> James Cameron wrote:
> > Okay, good, that excludes single cause memory or CPU problems. In my
> > day job I've seen systems that will not trigger memtest failures yet
> > show evidence of them when other devices are used. memtest doesn't
> > exercise the memory at the same time as the PCI bus or devices on it.
> > So it helps here by suggesting the memory and CPU are fine.
>
> One thing I haven't done, though, is run it for a very long period of
> time. I had let it go for... about four hours or so? Somewhere in there.
>
> I'll do that again.
>
> > Thanks. Also, take note of what hangs ... does the mouse move on
> > screen, does the capslock LED respond on the keyboard, are there any
> > unusual LED indications from the front panel; e.g. disk LED jammed on.
>
> This tends to vary. Sometimes, the mouse pointer still moves but I can't
> click anything. Sometimes, it's a total hard lock, and the lights on the
> keyboard for num lock and caps lock won't work at all. Sometimes, it's
> just Firefox that locks up, and I have to kill it.
>
> The mouse pointer still moving, though, has been common enough hang that
> it stands out in my memory.
>
> > There are some really interesting methods to capture data about a hang,
> > but not sure if you want to go there yet. My favourite is a serial
> > console with a laptop next to the failing system.
>
> That sounds like fun. I haven't broken out my laptop (really, an MSI
> Wind netbook, but hey, it works and it does what I need it to) since the
> last semester ended, so it needs a bit of exercise.
>
> -- Darren
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Received on Fri May 22 16:15:02 2009