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

[Werner <ws@seh.de>]

On Wednesday 12 September 2001 16:34, Deti Fliegl wrote:
> 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 canīt beleve it: Same here ! - i thought iīm 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.

a wild guess: maybe there is a memory leak in the driver
and you should try to set up some swap space

Werner





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