Sync failure for frame Interrupted system call

[enrico1301]

hi all
I have a problem that generate false alarm; in syslog have many line like this:

May 29 18:24:55 localhost zmc-d0[5084]: ERR [Sync failure for frame 2: Interrupted system call]
May 29 18:31:26 localhost zmc-d0[6463]: ERR [Sync failure for frame 0: Interrupted system call]
May 29 18:31:36 localhost zmc-d0[25588]: ERR [Sync failure for frame 5: Interrupted system call]
May 29 18:35:37 localhost zmc-d0[26095]: ERR [Sync failure for frame 5: Interrupted system call]

in some cases this failure generates an alarm and the image is half of two cam's images with a black horizontal line.

always before the sync failure there is a line like this:

May 29 19:12:31 localhost zmc-d0[13694]: INF [Got TERM signal, exiting]
with the same pid of zmc.

in my log file don't find any error about bttv driver


my configuration
debian 3.0r2 ,custom kernel 2.4.26 with patch for bttv driver 0.9.15 (last version)
use 2 trust 814PCI with 3 cam (all on the same board)

bttv: driver version 0.9.15 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
bttv0: Bt878 (rev 17) at 00:09.0, irq: 12, latency: 32, mmio: 0xde001000
bttv0: detected: Grandtec Grand X-Guard [card=103], PCI subsystem ID is 0304:0102
bttv0: using: Grand X-Guard / Trust 814PCI [card=103,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00ffffff [init]
bttv0: using tuner=4
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: PLL: 28636363 => 35468950 . ok
bttv: Bt8xx card found (1).
bttv1: Bt878 (rev 17) at 00:0a.0, irq: 5, latency: 32, mmio: 0xde003000
bttv1: detected: Grandtec Grand X-Guard [card=103], PCI subsystem ID is 0304:0102
bttv1: using: Grand X-Guard / Trust 814PCI [card=103,autodetected]
bttv1: gpio: en=00000000, out=00000000 in=00ffffff [init]
bttv1: using tuner=4
bttv1: registered device video1
bttv1: registered device vbi1
bttv1: PLL: 28636363 => 35468950 . ok

thank for help
Enrico

[zoneminder]

May 29 19:12:31 localhost zmc-d0[13694]: INF [Got TERM signal, exiting]

Is nearly always because the process has been terminated due to slow capture rates, check zmwatch.log to see. Assuming this is the case this is what the 'interrupted system call' error refers to. It sounds possibly like the capture process is getting stuck and then the watchdog daemon is killing it to restart it again. Check the log anyway and see.

Phil