[linux-dvb] FDSR messages

David Sobon dsobon at gmail.com
Tue Apr 12 13:21:04 CEST 2005


On Apr 12, 2005 11:43 AM, Hamish Moffatt <hamish at cloud.net.au> wrote:
>
> Do you get any FBUS errors in addition to the FDSR errors?

Yes, it seems to happen right after starting the stream dump when the
HD spins up, or if I switch virtual desktops or scroll around the
virtual screen.

Maybe that explains why I always get weird A / V sync issues. or
mplayer's fault. bleh.

Mar 25 00:20:02 gearbox kernel: bt878(0): irq FTRGT FBUS risc_pc=01708128
Mar 28 20:25:01 gearbox kernel: bt878(0): irq FTRGT FBUS risc_pc=01708168
Mar 31 23:45:08 gearbox kernel: bt878(0): irq FTRGT FBUS risc_pc=017080f8
Mar 31 23:45:16 gearbox kernel: bt878(0): irq FTRGT FBUS risc_pc=01708038
Apr  9 00:00:03 gearbox kernel: bt878(0): irq FTRGT FBUS risc_pc=1faca008
Apr  9 00:00:03 gearbox kernel: bt878(0): irq FDSR FBUS risc_pc=1faca008
Apr  9 00:00:03 gearbox kernel: bt878(0): irq FDSR FBUS risc_pc=1faca008

> For me, FBUS was the main problem. It means that the buffers in the
> BT878 overflowed, because the PCI bus is too busy doing other things.
> 
> See what else you have on the same PCI bus (using lspci). In my case the
> on-board SATA controller was on the same PCI bus as the slots, so when I
> did much access to a SATA disk I got FBUS errors.

How can I tell if it's on the same bus? same irq? Not using SATA here.

procinfo shows:
irq  0: 327576176 timer                 irq 16:  22981007 eth0, mga at PCI:1:0:0  
irq  1:    264741 i8042                 irq 17:   2885663 bttv0, bt878         
irq  8:  11302046 rtc                   irq 18:   2395942 bttv1, bt878         
irq  9:         0 acpi                  irq 19:    410297 Ensoniq AudioPCI     
irq 14:  24775224 ide0                  irq 21:   4050071 uhci_hcd, uhci_hcd,  
irq 15:    721948 ide1    

I do have an analog card (irq == 18) in there aswell.

> There was no solution except to replace the card with one that used a
> better chipset.

That's weird. it worked without problem while using the machine
interactively on my old dual celeron. maybe the system distributed
IRQs between the CPUs and did not hammer the system as much as a
single CPU system. Now to wait for dual core processors to solve this
problem, heh.

> The Lite card is cheaper than the FusionHDTV non-Lite because the
> chipset is crap for digital TV. Sorry about that.

Pity most "reviews" mention there are practically no differences
between cards besides the windows software. Now I kind of regret
getting the Lite version. Looks like this chipset is the realtek
version of tv cards. heh.

-David.




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