For various reasons, I'm using mythtv cvs (2005-01-22). With the sable releases I was experiencing a loud chirp noise when skipping around. Thankfully that's mostly gone now. So I'm happier using cvs.
With live tv, every few seconds the frontend process outputs: WriteAudio: buffer underrun If I pause it for a few seconds, the problem goes away completely. The cvs version lets you increase the ringbuffer size, but this seems to have no effect. It doesn't seem to matter if /dev/dsp or ALSA is used for output. Another interesting point is that the problem rarely happens immediately after switching to live tv. It mostly occurs after the first channel change. After the first channel change, the problem does not go away unless the video is paused. In /lib/modules/2.6.10-1.741_FC3smp/updates/drivers/media/video I've copied msp3400-ivtv.ko to msp3400.ko. I undersand that the ivtv version of this file should be used. I've tried various version of alsa and ivtv, but they do not seem to have any effect on this problem. How odd. Can anyone shed some light on this? Thanks! System information follows: 2.6.10-1.741_FC3smp alsa-kmdl-2.6.10-1.741_FC3smp-1.0.8-35.rhfc3.at ivtv-0.3.2b-65.rhfc3.at 2 PVR250's: Jan 16 18:16:36 mythtv kernel: tveeprom: Hauppauge: model = 32032, rev = B110, serial# = ******* Jan 16 18:16:36 mythtv kernel: tveeprom: tuner = Philips FI1236 MK2 (idx = 10, type = 2) Jan 16 18:16:36 mythtv kernel: tveeprom: tuner fmt = NTSC(M) (eeprom = 0x08, v4l2 = 0x00001000) Jan 16 18:16:36 mythtv kernel: tveeprom: audio_processor = MSP3440 (type = 11) Jan 16 18:16:38 mythtv kernel: tveeprom: Hauppauge: model = 32552, rev = C168, serial# = ******* Jan 16 18:16:38 mythtv kernel: tveeprom: tuner = LG TAPE H001F MK3 (idx = 68, type = 47) Jan 16 18:16:38 mythtv kernel: tveeprom: tuner fmt = NTSC(M) (eeprom = 0x08, v4l2 = 0x00001000) Jan 16 18:16:38 mythtv kernel: tveeprom: audio_processor = MSP3440 (type = 11) -- -Tim
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