[linux-dvb] syslog: av7110_fw_request: timeout waiting for HANDSHAKE_REG - What does this mean?

C.Y.M syphir at syphir.sytes.net
Wed Jun 8 12:53:44 CEST 2005

Johannes Stezenbach wrote:
> On Fri, Jun 03, 2005 at 10:06:52AM +0200, Sebastian wrote:
>>Jun  3 05:31:43 hal9000 av7110_fw_request: timeout waiting for HANDSHAKE_REG
> ...
>>I can't remember seeing these messages before. I just hope it doesn't
>>mean my card is dying. :) The thing is I didn't do anything that I could
>>relate to these messages, be it changing hardware or software. The card
>>has its own IRQ, too. I run VDR (development tree) and I don't have any
>>problems with recordings or anything else on this box.
> I don't know what causes it. The error message means the firmware
> crashed (or it's internal state got confused) in a different than
> the usual location.

I am able to reproduce this "handshake" error by maxing my cpu and then using an
application that outputs through the FF card.  For example.. I start mencoder to
encode an mpeg file which pretty much uses all the cpu on my machine.  Then, I
use mplayer to output a mpg file with mpegpes while the machine is still
encoding the other file.  Almost immediately I start finding "av7110_fw_request:
timeout waiting for HANDSHAKE_REG" in the syslog. If I am not maxing out my cpu
(ie; encoding a file) while I play a mpg via mpegpes, then the errors do not occur.

Best Regards,

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