[mythtv] firewire tester

John P Poet jppoet at gmail.com
Thu Sep 14 01:49:35 UTC 2006

On 9/13/06, Andrew Casper <andrew at andrewcasper.com> wrote:
> On Sep 13, 2006, at 8:21 PM, Jim Westfall wrote:
> it should be ok to run while backend is running, so long as its not
> recording with the node you are testing.
> Thanks John - that pointed me in the right direction. Unfortunately it
> didn't fix my issue.
> Since you seem to be the firewire guru, I have a issue that you might be
> able to solve...
> I've got a DCT-6200 and 14 HD channels on my plan. MythTV has no trouble
> tuning 10 channels. The other 4 are on a special HD package from my provider
> and are a little problematic. Before .20, if MythTV could lock to the
> broadcast stream on one of the 4, I would get about a minute of broken up
> picture before the backend would just stop. At the same time, the backend
> log would fill with TS packet out of sync errors. Now with .20, I see
> FireRec, Error: TS packet out of sync but the backend doesn't crash. CPU
> usage is not an issue
> I checked the service menus on the DCT-6200 and none of the channels has 5c.
> MythTV seems to like broadcast mode at 200 Mbs.
> I tried to recompile the kernel (2.6.17-2174) with your dma.diff firewire
> fix (hand edited it as the diff doesn't like the current kernel), but the
> compile kicked and error when it got your last change (too many variables?).
> So, would the firewire kernel fix help this? Any other words of wisdom?
> Thanks in advance.
> - Andrew

I had very similar problems at one time.  Turned out to have something
to do with my on-board 1394a port.  Switched to a cheap PCI addon
firewire card, and the problem went away.


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