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<H1>[Mageia-dev] Strange system stalls - neep a tip</H1>
<B>Robert Fox</B>
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TITLE="[Mageia-dev] Strange system stalls - neep a tip">list at foxconsult.net
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<I>Mon May 21 20:10:23 CEST 2012</I>
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<PRE>On Mon, 2012-05-21 at 19:50 +0200, David Sjölin wrote:
><i> On Mon, May 21, 2012 at 7:33 PM, AL13N <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">alien at rmail.be</A>> wrote:
</I>><i> > perhaps check the logs (/var/log/messages) for information regarding those
</I>><i> > downtimes.
</I>><i> >
</I>><i> > see if the ping also delays
</I>><i> >
</I>><i> > perhaps try to monitor something via ssh or in tty, to see if it's only
</I>><i> > the graphic card.
</I>><i> >
</I>><i> > also, check ntpd settings, do they make big jumps?
</I>><i> >
</I>><i> > etc...
</I>><i> >
</I>><i> >
</I>><i> > in short: logging is always the key.
</I>><i> >
</I>><i> >> Hello All -
</I>><i> >>
</I>><i> >> I am experiencing a strange problem with a specific machine running
</I>><i> >> Cauldron. I am beginning to believe it is NOT a Mageia problem because
</I>><i> >> when I boot into Ubuntu 12.04 the problem exists as well. I think it
</I>><i> >> may be hardware related but I can not find what is causing this issue.
</I>><i> >>
</I>><i> >> The machine is an Acer Aspire x3900 with a quad core ‎AMD Phenom(tm) II
</I>><i> >> X4 925 Processor - 6GB memory. GeForce GT215 (GeForce 320) card. I am
</I>><i> >> running the x86_64 version of Cauldron.
</I>><i> >>
</I>><i> >> The problem occurs under both KDE and Gnome
</I>><i> >>
</I>><i> >> Basically, the system seems to freeze up (mouse moves) but nothing else
</I>><i> >> - gkrellem freezes and no errors occur - it just seems to hang - but
</I>><i> >> magically wake up again after some time (many seconds at a time)
</I>><i> >>
</I>><i> >> I have checked various logs and can not find any problems - so I am
</I>><i> >> stumped how to find the source of the problem. I leave the machine
</I>><i> >> running 24x7, but don't think it is a thermal issue.
</I>><i> >>
</I>><i> >> When the system runs under Windows 7 (64bit) it appears to run fine.
</I>><i> >>
</I>><i> >> Any hints what I could check?
</I>><i> >>
</I>><i>
</I>><i> Hello!
</I>><i>
</I>><i> If you want to log cpuusage to see if some process has extra high cpu
</I>><i> usage during this freeze you could do something like:
</I>><i>
</I>><i> while true; do date >> testfilen.txt ; top -b -n1 >> testfilen.txt ;
</I>><i> sleep 1; done
</I>><i>
</I>><i> Then you will get top-output every second (sleep 1) or whatever time
</I>><i> you specify for sleep. I think there is a way to do this with top
</I>><i> only, without the delay but not sure which flags to use then (possibly
</I>><i> top -d 1 -b)
</I>><i>
</I>><i> The file testfilen.txt will of course grow quite large after a while,
</I>><i> so you can't keep this running 24/7 maybe, but maybe you could clear
</I>><i> out the file regularly until you get the error situation again and
</I>><i> then based on the date output you should be able to find cpu usage
</I>><i> around the time of the problem.
</I>><i>
</I>><i> Regards,
</I>><i>
</I>><i> David
</I>
Thanks for the quick responses. I checked the cpu usage, but there
doesn't appear to be a spike - and the load average in htop is real low:
load average: 0.46, 0.67, 0.56
so if the X server or something else was maxing out the cpu, I'd see
that.
Also, if I use a console in KDE (like yakuake) - the stalls happen in
there as well. At first I though this was Firefox related (like flash
problem or something) because it was most noticeable when I surfed -
firefox freezes off and on and it is really frustrating.
This machine was working fine for at least a year - and I was suspecting
something with the latest kernels and the AMD processor - but have no
evidence.
The search continues . . .
Thanks again,
R.Fox
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