Re: that X/Gnome lockup thing. How to trace it?

["Kevin D. Knerr, Sr." <kknerrsr ptdprolog net>]

On  5 Jul, Paul E Johnson wrote:

> In my local Linux user group, I mentioned that my RH 6.1 system was
> locking up. I'd never had a lockup in linux for 3 years, until Gnome
> 1.2.1 made its appearance.  Several people chimed in with the same
> complaint.  Then I put it together with the mentions of lockups in this
> list and I started to wonder if the problem might be widespread.
> 
> The symptom as I see it is that the system locks up suddenly, nothing
> works. The mouse does not respond, Alt-control-backspace does not work. 
> A reset button is the only solution.  I've associated the problem with
> heavy RAM usage, when the RAM and swap are near full.

I see it with heavy RAM--but I hardly ever have heavy swap usage. But
not necessarily heavy RAM either . . .

> This problem happened to me only on a P-166 with 64 meg RAM. I do not
> see it on other systems that have 128 and 256 meg ram, respectively.

Hmm--I've got 64MB RAM and a 128MB swap partition . . .

> After restarting, I do not find any core file to backtrace or any other
> hint to explain what went wrong.

Same deal, other than the X errors/warnings I've already noted.

Although I have had some kernel segfaults and other kernel memory errors
if I was lucky enough to just be dumped out of X. Hmm . . . I just got
dumped a few hours ago . . .

Jul  6 12:45:21 calainar kernel: Unable to handle kernel NULL pointer dereferenc
e at virtual address 0000005c
Jul  6 12:45:21 calainar kernel: current->tss.cr3 = 01820000, %cr3 = 01820000
Jul  6 12:45:21 calainar kernel: *pde = 00000000

Does this help anyone? IIRC, at the time of this error I had
CTRL-ALT-BS'd out of X because I was trying gmc (which locked, taking
the panel & sawfish with it)

Barthel
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