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Date:      Wed, 29 Jan 1997 19:21:42 -0800 (PST)
From:      Dara Ghahremani <dara@salk.edu>
To:        Terry Lambert <terry@lambert.org>
Cc:        current@freebsd.org
Subject:   Re: installing network cards
Message-ID:  <Pine.SUN.3.95.970129191739.21571T-100000@helmholtz>
In-Reply-To: <199701300136.SAA20688@phaeton.artisoft.com>

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The problem on this machine seems to be with connecting to the NFS
server:

marr /kernel: nfs not responding              # marr is the machine name

But this problem doesn't occur when I switch this 3COM 3c595 net card w/
the older 509 card.

Any ideas?

Dara

On Wed, 29 Jan 1997, Terry Lambert wrote:

> > The machine is a Dell XPS P133c running AMIBIOS A02 with 64 MB RAM. 
> > It's running IDE w/ one disk. The dmesg scrolls too quickly off the screen
> > for me to tell if it uses CMD640b IDE (neither "more" or any editor is
> > installed on the local disk). I don't see any reference to the L1 or L2
> > cache in the BIOS setup. 
> 
> Hit "scroll lock" on the console.  Use "pgup/pgdn" to read the dmesg.
> 
> You may try booting with the original (non-working ethernet) kernel,
> as well.
> 
> > The machine gets to the point where it's pingable from another host and
> > telneting works until after the password is entered. Then, the system
> > doesn't respond to control-Cs as I described in a previous message.
> 
> So it is locking up when execing the shell.  This is either a problem
> with the shell (it makes a DNS call that never returns to look up the
> host name so it can display it in your prompt, like tcsh), OR a
> problem with the in-memory image of the shell (the cache contains
> bogus data for one or more L1 or L2 cache lines because the DMA
> page invalidate did not occur or the cache is just bad) OR a read
> from the physical media on behalf of the process, by the kernel, to
> fault in a page of the shell executable (driver and/or disk bug,
> potentially the RZ1000 IDE bug [I think that one's worked around] or
> the CMD 640b bug [that one isn't] or the HiNT chipset bug [that one
> isn't] or the Saturn I family PCI chipset bug [that one isn't] or a
> VLB controller in a slave slot [that one isn't], etc.).
> 
> Either way, turning off your cache would help us tell you which one
> is the problem, or if none of them are.
> 
> 
> > By the way, the machine works fine when I change to the previous 3COM 509
> > card so I believe there is something about this 3COM 595c card that is
> > bringing about these problems. Perhaps the author of the vx0 driver for
> > this card would know what's going on?
> 
> Possibly; or perhaps you are running an old driver, or the wrong version
> of the driver for your kernel.  It may be that it doesn't work with
> PCI interrupt sharing because of a driver bug, and reordering the cards
> will make it not have to share.
> 
> 
> 					Regards,
> 					Terry Lambert
> 					terry@lambert.org
> ---
> Any opinions in this posting are my own and not those of my present
> or previous employers.
> 




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