terminals randomly disconnecting

[Krsnendu dasa]

Thank you for these tips. I will try a few things out and report back my
findings.

On 07/01/2008, Gavin McCullagh <gmccullagh at gmail.com> wrote:
>
> Hi,
>
> On Mon, 07 Jan 2008, Krsnendu dasa wrote:
>
> > I am experiencing an unusual problem. Occasionally (every 15 mins or so)
> all
> > the terminals just disconnect. The terminals need restarting before they
> > work again.
>
> What you say all, you mean every thin client connected to the server?
>
> Every 15 minutes is pretty nasty.  I guess at least it's easy enough to
> repeat if you're testing.
>
> You say the clients need restarting and I gather the server doesn't.  Can
> you ping a thin client after this happens (ie without rebooting it)?  If
> you press <ctrl><alt><backspace> is that enough to restart the thin
> client?
>
> > In what I think may be a related issue, some times when someone is
> logged in
> > their terminal freezes and the panel at the bottom of the screen which
> shows
> > which windows are open just has three tabs that all say untitled window.
>
> Have you had opportunity to watch top for a few minutes and see does some
> process go wild around this point?
>
> > Background: I am using 32 Edubuntu 7.04 on Intel Quad Core. 4 Gb RAM. I
> am
> > using directx ldm and smbldap.
>
> Would it be possible for you to try not using direct-x and go back to the
> default ssh method?
>
> > I am using a 100/1000 unmanaged switch which feeds 10/100 switches in
> each
> > class.
> >
> > Things I have already tried.
> > At first I thought it could be the 1000 switch, so I swapped it for
> another
> > one, but the problem remains.
>
> Was it another similar switch?  Could it be a problem between the
> switches?
>
> > Possible solutions:
> > Could upgrading to Gutsy help?
>
> It's hard to say without knowing what the cause of the problem is.
>
> > Could it be the network card in the server?
>
> Sounds plausible.
>
> > Can someone help me debug this? Are there any log files I can check to
> trace
> > the origin of this problem?
>
> Yes:
>         /var/log/syslog
>         /var/log/messages
>         /var/log/kern.log
>         /var/log/daemon.log
>
> > Thanks for any help. This is really frustrating, because I had a very
> stable
> > system with K12LTSP 6, and now with Edubutnu 7.04 I have having quite a
> few
> > problems.
>
> How long have you had this problem?  You've been using 7.04 for a while,
> right?  Has it always happened?  Has anything changed to prompt this?
>
> Gavin
>
>
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