Re: Hard Lockups can't happen (can they?)
On Sun, 27 Mar 2005 11:09:19 -0600
Ron Johnson <ron.l.johnson@cox.net> wrote:
> On Sun, 2005-03-27 at 17:41 +0100, Alan Chandler wrote:
> > On Sunday 27 March 2005 17:09, Paul Fraser wrote:
> > > Not if the fan were stopped entirely.
> > > -----Original Message-----
> > > From: Ron Johnson [mailto:ron.l.johnson@cox.net]
> > >
> > > On Sun, 2005-03-27 at 11:46 +0100, Anthony Campbell wrote:
> > ...
> > > > Make sure you didn't leave a cable touching the CPU fan. I did this
> > > > once during an upgrade and the consequent overheating caused lockups.
> > >
> > > Wouldn't you hear buzzing noise from the fan slapping the cable?
> >
> > Thanks for the idea's guys BUT
> >
> > The computer runs for hours (all yesterday afternoon, evening and through
the
> > night) without problems yet...
> >
> > ...hangs solid within seconds of using konqueror (from KDE 3.4 from
> > experimental).
> >
> > So IT COULD BE a very specific hardware fault, but ... I can still browse
> > perfectly happily for hours with Firefox.
> >
> > and WHY can a userland application such as konqueror crash the operating
> > system. (and more importantly HOW do I put some debug in to find out what is
> > doing it).
>
> Maybe it's very stressful on the system?
>
> I'd check to see if the RAM is seated properly.
>
Considering it happened on the game also it may be a problem with the network
card with some command that can be triggered from userland (they sometimes
partially die, especially the cheep ones such as realtech, mine only works at
10Mbps now, doesn't sync and 100Mbps for example) try using a different one if
possible to check. Another option is some bug with the driver, although that
would have to be specific to your hardware otherwise someone else would have hit
it before.
You could try to run tcpdump on a terminal and work with you app (konqueror/the
game you mentioned in another post) not in full screen mode so that terminal is
visible and then see when it locks up if they lock on the same network message
(although it probably won't register if there is a lockup, but maybe)
If its a self-compiled kernel you can enable sysrq support and see if SysRq-r or
b or h (don't remember which) shuts down you system. If its a network problem it
could be that the computer is not completely dead despite the network being
dead.
> --
> -----------------------------------------------------------------
> Ron Johnson, Jr.
> Jefferson, LA USA
> PGP Key ID 8834C06B I prefer encrypted mail.
>
> "Nothing is so admirable in politics as a short memory."
> John Kenneth Galbraith
>
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