bttv problem

[Linos <info@linos.es>]

Hi,
	i have 2 Provideo PV150 multi-capture PCI board video cards  (4 bt878 chipsets 
in every board), i have the four ports of the first multi-capture boards used in 
a xorg session with 4 instances of tvtime application showing the realtime of 
the four ports, and the other one recording with Helix producer.

Many times a day i have this errors in kernel:

[447547.296022] bttv7: timeout: drop=3276 irq=1957469/35501901, risc=204bb9ac, 
bits: HSYNC OFLOW
[447547.836020] bttv7: timeout: drop=3287 irq=1957508/35501981, risc=2a9a89ac, 
bits: HSYNC OFLOW
[448114.536016] bttv6: timeout: drop=4747 irq=26301665/59788770, risc=2050c998, 
bits: HSYNC OFLOW
[449923.196018] bttv1: timeout: drop=57206 irq=33728690/35680137, risc=19d83acc, 
bits: HSYNC OFLOW FBUS
[449923.736024] bttv1: timeout: drop=57217 irq=33728729/35680176, risc=344faf20, 
bits: HSYNC OFLOW FBUS

Tvtime seems to survive but the helix producer processess die with this error, 
if i don't load the xorg session with tvtime and at the same time I disable acpi 
in linux i don't get this erros, i have tried to disable acpi because i have 
read about other people having the same problem and fixing this way, but if i 
use tvtime at the same time the problem remains regardless of the acpi status, i 
have now gbuffers at 16 but still the same result.

My system it is using debian squeeze with 2.6.32 kernel in a Asus P5E-V HDMI 
with an intel G-35 chipset.

Any ideas on how i could fix this problem please?

Regards,
Miguel Angel.