[linux-dvb] DVB driver-related system hang with SuSE 8.2's SMP kernel

[Dr J A Gow <J.A.Gow@furrybubble.co.uk>]

Hello,

	I have an interesting problem with the latest (1.0.0-pre3) DVB driver
set when running on a stock SuSE 8.2 SMP kernel. This manifests itself
as a complete system lockup. No oops, no trap dump, nothing, just a
frozen system. Before I go any further, just a word about the system
configuration:

Kernel:		Stock SuSE 8.2 (2.4.20-64GB-SMP)
DVB card:	Hauppauge WinTV/NOVA
M/B:		Asus P4T533, 256MB RAM

It should be noted that the CPU is a hyperthreaded 3GHz P4, with the SMP
kernel running, and 'seeing' the two logical processors.

Now, the system lockup seems to occur when opening any of the devices
(e.g. when tzap opens /dev/.../frontend0 etc, or when one attempts to
run dvbstream).

If, with the *same system and hardware configuration*, the SMP kernel is
replaced with the stock SuSE uniprocessor kernel, everything works. This
problem seems only to affect SMP.

I wonder if:

(a) anybody has any ideas as to where to look, or suggestions of things
to try.

(b) I am willing to help debug this if it turns out not to be a trivial
problem. I have several years' experience as a systems-level programmer
writing device drivers for OS/2, but I have not done much in the way of
Linux kernel modules. If someone can point me in the direction of a good
online guide to kernel modules and also in the direction of a kernel
debugger, if such a beast exists, I will get stuck in.

Many thanks

	John.


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|                 | Dr. J.A. Gow M.Eng Ph.D CEng MIEE                  |
|      \||/       | Power Electronics Specialist    		       |
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