[mythtv-users] chirping in recordings with pchdtv hd-3000's and 0.21

[Patrick Wagstrom]

I've had a stable mythtv box with dual hd-3000 cards for the last three 
years.  After some issues with a power supply on the machine conking out 
while recording, the cards have worked wonderfully.  Well, at least until I 
upgraded to 0.21.

Since upgrading to 0.21, I get numerous "chirps" in my recordings; about 
every 5 minutes or so.  These usually happen where there is some slight 
video damage.  The errors are usually accompanied by a message in my log:

cx88[0]/2: queue is empty - first active
cx88[0]/2: cx8802_start_dma w: 0, h: 0, f: 2
cx88[0]/2: setting the interrupt mask
cx88[0]/2: [d9469600/0] cx8802_buf_queue - first active

Looking around, this error is usually caused by either not tuning a channel 
or not having enough throughput to the drives.  The first cause is 
eliminated because I'm watching shows, so I know I'm tuned.  The second 
possible cause I think I can safely eliminate because my tests show my 
drives (a sw RAID 5 array) can push 50+MB/s on writes to the drives.

The OS is Ubuntu Dapper, kernel 2.6.15-26.  Not sure if it matters, but 
there is also a PVR-250 installed.  Nothing changed on the machine to make 
it start doing this except the upgrade from 0.20->0.21.

Any thoughts?

--Patrick