CentOS - Feb 2009 - tty login hangs

Hi all,

I have two servers both identical in hardware and I have just done a
clean install of CentOS 5.2 x86_64 on both.

Sometimes (more often than not) when I log in at the physical console
(e.g. tty1, tty2, etc.) I will be logged in and it stops responding even
if the shell is not doing anything.

When this happens I can still switch to another VT with alt+f2 and login
as normal.

I don't know if bash, mingetty or whatever process is locking up. If I
do a `ps ax` all processes are sleeping.

Any idea's what could cause this?

Thanks

From: Stewart Williams <lists at pinkyboots.co.uk>
> Sometimes (more often than not) when I log in at the physical console
> (e.g. tty1, tty2, etc.) I will be logged in and it stops responding even
> if the shell is not doing anything.
> When this happens I can still switch to another VT with alt+f2 and login
> as normal.
> I don''t know if bash, mingetty or whatever process is locking up.
If I
Maybe try an strace on the shell to see on what it is stuck...

JD

> From: Stewart Williams <lists at pinkyboots.co.uk>
> > Sometimes (more often than not) when I log in at the physical console
> > (e.g. tty1, tty2, etc.) I will be logged in and it stops responding
even
> > if the shell is not doing anything.
> > When this happens I can still switch to another VT with alt+f2 and
login
> > as normal.
> > I don''t know if bash, mingetty or whatever process is locking
up. If I
I assume that you''ve tried typing <Ctl+Q> -- just in case of
flow control, yes/no?

  -rak-

Richard Karhuse wrote:
>> From: Stewart Williams <lists at pinkyboots.co.uk>
>>> Sometimes (more often than not) when I log in at the physical
console
>>> (e.g. tty1, tty2, etc.) I will be logged in and it stops responding
even
>>> if the shell is not doing anything.
>>> When this happens I can still switch to another VT with alt+f2 and
login
>>> as normal.
>>> I don''t know if bash, mingetty or whatever process is
locking up. If I
> 
> I assume that you''ve tried typing <Ctl+Q> -- just in case of
> flow control, yes/no?
> 
>   -rak-
No I haven''t tried this. I will let you know if it works.

John Doe wrote:
> From: Stewart Williams <lists at pinkyboots.co.uk>
>> Sometimes (more often than not) when I log in at the physical console
>> (e.g. tty1, tty2, etc.) I will be logged in and it stops responding
even
>> if the shell is not doing anything.
>> When this happens I can still switch to another VT with alt+f2 and
login
>> as normal.
>> I don''t know if bash, mingetty or whatever process is locking
up. If I
> 
> Maybe try an strace on the shell to see on what it is stuck...
> 
> JD
I''ll do this when it happens again, but it''s been OK for a
while.