[linux-dvb] Re: Problems w/ VDR recording

[Deti Fliegl <deti@fliegl.de>]

On Wednesday, 12. September 2001 15:30, you wrote:
> Deti Fliegl writes:
>  > Axel Gruber wrote:
>  > > > I think might be a big problem with the CVS DVB driver when
>  > > > recording streams with VDR-0.94. After some minutes my computer
>  > > > disconnects all TCP/IP connections, does not accept new ones and
>  > > > even does not allow console logins - finally I have to reboot the
>  > > > computer manually by pressing the reset button. The problem occurs
>  > > > with the
>  > > > siemens_dvb-0.9-20010817.tgz driver from Klaus' homepage.
>  > >
>  > > I can愒 beleve it: Same here ! - i thought i惴 the only one.
>  > >
>  > > But exact the same - all Connections down after some time.....
>  > >
>  > > With a older driver (09version) the same Machine runs since over 1
>  > > Month without any problems....
>  > >
>  > > > Maybe somebody can help me... before I start with kernel debugging.
>  > > > My personal feeling is that there is some bad memory pointer
>  > > > (including a write access to it) in the driver which causes the
>  > > > system to behave unreliable.
>  > >
>  > > Sorry i need Help too ....
>  >
>  > Testing with a driver from August 7th (checked out from the CVS) - the
>  > same happens.
>  > Well - I think the DVB drivers have grown too big and complicated. Most
>  > of the kernel code would better  be placed in a library.
>
> Actually the drivers have gotten smaller since we got rid of av_pes.
> Since you seem to be the only one with problems like that, there may
> be another reason. Can you give some more information about your
> system?

First of all: 
Axel, Me and my colleague Georg Acher have got similiar Problems: Processes 
are dying, the system behaves unreliable until the kernel stops working. 
There was never an OOPS - which could have been debugged.

My setup is:

CPU: AMD K6-400 
RAM: 96Mbyte RAM 
Board: Acer AP53 (Intel TX chipset), 
NIC: 3c905c
VGA: Riva 128 (PCI)
DVB: classic Hauppauge card.
AUDIO: MAD16 (Opti Chipset, ISA)

Distribution: SuSE 7.2 with latest updates
Boot: Via the PXE boot prom of the NIC with NFS on root. 
Swap: none!
WM: none, only console
Compiler: gcc version 2.95.3
Kernel: 2.4.9
DVB-Drivers: latest CVS 
VDR: 0.94

Just a guess: I think the problem occurs in this setup more likely because 
there is less memory available and thus it's more likely that a wrong pointer 
could modify sensitive  data.

The system itself is very stable. It could work for days and weeks if the DVB 
drivers are not loaded.

Deti

PS: Maybe Georg will write his DVB/VDR Story.


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