Comment 0 for bug 397696

I have been running a mythtv box for the last 12 months, first with 8.04 and then with 8.10. Once up and running the system has been running very reliably (except for an occasional x.org CPU 100% incident). When initially setting up the system I had some stability issues with my digital tuner - a Hauppauge Nova-T 500 Dual DVB-T. Those problems were that the tuners would disconnect by themselves and the programs would not be recorded. These issues were fixed by disabling EIT.

*However* last week I upgraded to 9.04 and the problems re-appeared. After a day or so of operation the tuners would fail - only a reboot would bring them back to life.

Failure Extra Information at boot:
Jul 5 12:49:05 sal kernel: [ 11.782045] dvb-usb: found a 'Hauppauge Nova-T 500 Dual DVB-T' in cold state, will try to load a firmware
Jul 5 12:49:05 sal kernel: [ 11.782048] usb 3-1: firmware: requesting dvb-usb-dib0700-1.20.fw

Failure Extra Information when failing:
Jul 6 01:05:00 sal kernel: [ 2470.460430] dvb-usb: error while stopping stream.
:
Jul 6 18:01:10 sal kernel: [63440.197035] mt2060 I2C write failed (len=2)
Jul 6 18:01:10 sal kernel: [63440.197039] mt2060 I2C write failed (len=6)
Jul 6 18:01:10 sal kernel: [63440.197043] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.204510] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.212008] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.220510] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.228510] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.236509] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.244528] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.252509] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.260509] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.268510] mt2060 I2C read failed
Jul 6 18:01:10 sal kernel: [63440.433743] dvb-usb: could not submit URB no. 0 - get them all back
Jul 6 18:01:10 sal kernel: [63440.433751] dvb-usb: error while enabling fifo.
Jul 6 18:51:36 sal kernel: [66466.736019] mt2060 I2C write failed
Jul 6 18:51:37 sal kernel: [66467.316010] mt2060 I2C write failed

Fixes:

Some digging around shows that the driver for the Nova-T was updated in 2.6.28 and it also loads a later version of the firmware than previously used.

I reverted to the 2.6.27 kernel from 8.04 which loads the 1.10 version of the firmware and all is working well again.