[mythtv-users] AF9015 USB Tuner (Leadtek USB Dongle Gold) badly broken

[Christopher Kerr]

On Sun, Dec 6, 2009 at 6:59 PM, Christopher Kerr <mythtv at theseekerr.com>wrote:

> Hi everyone,
>
> I bought a Leadtek USB Dongle Gold last week to use as a second tuner. Got
> it up and running easily enough, and it was all looking promising - PIP was
> working fine, and the first simultaneous test recordings worked perfectly.
>
> And then I tried again later, and it didn't work at all.
>
> Cue a day of me uninstalling, reinstalling, shuffling out other USB
> peripherals, retuning, etc, etc.
>
> The short version is that it works, but sometimes it tunes very slowly. As
> in, 10's of minutes. I had a 30 minute program fail entirely yesterday
> because it never sucessfully tuned. Other times, it will work perfectly.
>
> The only related symptom is that I have 3 channels (all on the same
> multiplex, 9 Networks) which I can't tune on either tuner - apparently they
> use some non-standard offset. Anyhow, when the new tuner is in its "I don't
> want to tune just yet" mode, failing entirely until suddenly it works, it
> will NEARLY tune these "broken" channels, getting to "LMs".
>
> Oh, and the tuner works perfectly under Windows XP, including the "broken"
> channels.
>
> Does anyone know where to start in tracking this one down?
>
> Thanks,
> - Chris
>

Just had a look at the dmesg output - it's not exactly pretty, it appears
that the driver is having some fundamental difficulty co-ordinating
communication between the DVB chip and the tuner chip:

[ 7046.253159] tda18271_read_regs: ERROR: i2c_transfer returned: -1
[ 8026.463184] af9015: recv bulk message failed:-71
[ 8026.463426] af9015: recv bulk message failed:-75
[ 8026.463430] af9013: I2C read failed reg:d417
[ 8026.463435] tda18271_read_regs: ERROR: i2c_transfer returned: -1
[ 8026.463439] tda18271_ir_cal_init: error -1 on line 786
[ 8026.463443] tda18271_init: error -1 on line 810
[ 8026.463446] tda18271_tune: error -1 on line 867
[ 8026.463450] tda18271_set_params: error -1 on line 948
[ 8596.179360] af9015: recv bulk message failed:-71
[ 8596.179601] af9015: recv bulk message failed:-75
[ 8596.179605] af9013: I2C read failed reg:d417
[ 8596.179610] tda18271_read_regs: ERROR: i2c_transfer returned: -1
[ 8596.179614] tda18271_ir_cal_init: error -1 on line 786

etc.

- Chris
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