[linux-dvb] Problem with Avermedia 771 : IRQ lockup

Hamish Moffatt hamish at cloud.net.au
Fri Sep 30 00:52:10 CEST 2005

On Fri, Sep 30, 2005 at 12:13:38AM +0200, Edgar Toernig wrote:
> Sylv at in wrote:
> > - a PCI Avermdia DVB-T 771 card with an Asus Pundit-R.
> > - the DVB drivers from kernel The card seems to be well 
> >[...]
> > Sep 25 16:34:36 katagen kernel: bt878(0): irq FDSR risc_pc=0d7e4210
> > Sep 25 16:34:38 katagen kernel: bt878(0): irq FDSR risc_pc=0d7e4200
> > Is this problem related to the hardware, the modules or the kernel
> > version ?
> This patch:
>   http://www.linuxtv.org/pipermail/linux-dvb/2005-September/004481.html
> should help.  It's for 2.6.13 but should also apply to

Doesn't this just ignore the errors? Admittedly that might not be a bad 
solution (although you will get some corruption when it occurs).

The thread that the OP mentioned discussed interaction between the BT878
and sata drivers. For me the problem was much worse when I started
streaming to SATA disk, but I had seen it on occasion before that. But I
do recall that it seemed better in earlier kernels (around 2.6.3?).
Maybe there is longer interrupt latency for some reason in newer

I'm now running a budget-ci card (SAA7134?) plus two cx23883s and it all
works perfectly.

Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>

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