I know I shouldn't have quoted mythtv to identify a problem, so I've tinkered with this a little more and can reproduce it using the dvb utilities. I can reproduce the problem using tzap and cat'ing /dev/dvb/adapter[23]/dvr0 to files. When one of the tuners tunes the the bad transponder, the files stop growing. Not always immediately, but typically within a few seconds. Turning on debugging in various dvb modules shows nothing obviously suspicious when it occurs, but I notice that when the problem occurs, when I kill the offending tzap, the following messages are logged. Apr 6 10:45:39 media kernel: [95234.332590] cx23885_wakeup: 0 buffers handled (should be 1) Apr 6 10:45:39 media kernel: [95234.332606] cx23885_wakeup: 0 buffers handled (should be 1) But if I kill it without the problem manifesting (either by using a non-offending transponder, or by killing it before the failure occurs with the problematic transponder) these messages don't appear. Also perhaps noteworthy is that once the offending tzap process is terminated, the file generated from the other resumes growing. Here are the modules I thought to turn on debugging. Any other suggestions? nathan@media:/sys/module$ grep -r 1 */parameters/*debug* af9013/parameters/debug:1 cx23885/parameters/debug:1 cx23885/parameters/i2c_debug:1 cx23885/parameters/vbi_debug:1 cx23885/parameters/video_debug:1 dvb_core/parameters/cam_debug:1 dvb_core/parameters/debug:1 dvb_core/parameters/dvbdev_debug:1 dvb_core/parameters/frontend_debug:1 dvb_usb_af9015/parameters/debug:1 tuner_xc2028/parameters/debug:1 videobuf_core/parameters/debug:1 videobuf_dma_sg/parameters/debug:1 videobuf_dvb/parameters/debug:1 zl10353/parameters/debug:1 zl10353/parameters/debug_regs:1 I'm happy to help track this down further if anyone can advise how to proceed. (I hope I haven't hijacked this thread, I never saw the earlier emails, but from what I could tell, it seems to be related to my experiences). (sorry for the repeated email, Daniel, I accidentally didn't Reply-to-all) Regards, Nathan. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
