On Tuesday 18 May 2004 14:26, Matthew Seaman wrote:
> On Tue, May 18, 2004 at 12:25:09AM +0200, platanthera wrote:
> > On Tuesday 18 May 2004 00:05, Dan Nelson wrote:
> > > In the last episode (May 18), platanthera said:
> > > > ls(1) crashed (exited on signal 10) for the second time within
> > > > a few days today. Could you please have a look at the core file
> > > > and tell me what's going on? Or even better yet - point me to a
> > > > beginners guide on how to interpret core files
> > >
> > > Signal 10 is a Bus Error and is usually due to bad memory or
> > > improper overclocking.
> >
> > I've checked the memory using memtest86, and _not_ overclocked the
> > cpu.
> That's the right thing to do in the first instance, but getting an
> "all clear" from memtest86 doesn't guarantee you are 100% clear of
> problems.  (In technical terms, memtest86 doesn't produce false
> positives (saying there's an error when there isn't one) but it does
> have a low rate of false negatives (saying there's no error when
> there is one))
> However, I'd start to look at other aspects of the system now -- the
> first thing to eliminate would be hard drive problems.  Can you
> reboot the system into single user mode, and run fsck(8) on all the
> partitions?  That's
>     # fsck -f
> (Nb. only the root fs should be mounted, and that should be mounted
> read-only while you're doing that.  Not coincidentally, that's the
> state booting into single user mode provides).
> If there are any errors reported by fsck(8), and especially if
> repeated fsck'ing doesn't clear them then your hard drive is probably
> about to give up the ghost.

fsck -f didn't report any errors. Additionally I've checked my disks 
using the scsi controlers verify disk utility. Seems they're OK.
> Other causes of the problem could be overheating -- not necessarily
> of the main CPU (as that just results in the screen going black, and
> whole system rebooting itself after a while) but of some of the
> bridge chipsets on the motherboard.  Sometimes those chips will have
> a fan assisted heatsink but that's not very common.  If they do,
> verify that the fan is working properly, and in any case, verify that
> the main case and power supply fans are working correctly, vents are
> not obstructed (either by stuff around your machine, or by dust on
> the inside) and that internal ribbon cables and so forth aren't
> preventing the free movement of air around the inside of the case.

I don't think it's a heat problem since there are no problems compiling 
large ports which means _many_ hours of 100% cpu load on my a bit 
elderly system. 
Just an idea - some time ago I exchanged my aha19160 scsi controller for 
a Tekram DC-390U2 (I wanted to play with Linux which didn't work with 
the Adaptec card). Although the DC-390U2 seems to work fine, might it 
eventually be that this is the reason for my recent problems?

> Even if you can't nail down exactly what the problem is, you might
> want to consider doing a cvsup + {build,install}{world,kernel} cycle.
> It will either make any deficiencies in your hardware glaringly
> obvious, or could very well make your trouble go away.

I've already tried this to overcome Signal 10 errors with cfs-1.4.1_1 - 
without any success, only downgrading to 1.4.1 helped in that case.

>       Cheers,
>       Matthew

thanks a lot for your hints
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