[mythtv-users] DVB-S2 scan fails (0.29)

[UB40D]

On 23 December 2017 at 22:50, Mike Bibbings <mike.bibbings at gmail.com> wrote:

>
> If you are using the built-in kernel drivers for the tbs 6981 (these are
> open source, as distinct from TBS drivers) you need some extra firmware in
> /lib/firmware/ see :
> https://github.com/ljalves/linux_media/wiki/CX24117-firmware
>
> Once the firmware is installed you  need to reboot.
>

Aha! This looks like a good tip. I now vaguely remember having done this
back in the day, but I hadn't redone it.

I notice that the page you link to is dated 2014 and extracts the firmware
from a 2013 vintage version of the TBS drivers (v130901), whereas the
latest version on the TBS website is from 2017. I followed the recommended
procedure on both versions (the 2013 is still downloadable from TBS,
fortunately) and the resulting firmware file is different. Since it looks
like the website just eats a lump of bytes from a given offset in a binary
file, I figured the offset and length were probably inappropriate for the
2017 drivers, so I stuck to the 2013 version, with the checksum as
indicated. I copied that into /lib/firmware as prescribed. Unfortunately,
after reboot, I don't get to see the drivers in dmesg at all, which is
worse than before. I now get the empty string at

dmesg | fgrep frontend

whereas before I would get

dmesg | fgrep frontend
[    4.985203] cx23885: cx23885_dvb_register() allocating 1 frontend(s)
[    4.987219] i2c i2c-1: cx24117: Attaching frontend 0
[    4.987223] cx23885 0000:04:00.0: DVB: registering adapter 0 frontend 0
(Conexant CX24117/CX24132)...
[    4.987712] cx23885: cx23885_dvb_register() allocating 1 frontend(s)
[    4.987717] i2c i2c-1: cx24117: Attaching frontend 1
[    4.987719] cx23885 0000:04:00.0: DVB: registering adapter 1 frontend 0
(Conexant CX24117/CX24132)...

So let me try the alternative of installing the latest TBS drivers:

(oops---operator error---I deleted /usr/src while doing that... how clumsy.
I can't complete this right now)



>
> As far as scanning is concerned I use for Freesat UK  (there is auto
> switching between DVS-S and DVB-S2)
>
> Freq: 10714000
> Polarity: Horizontal
> Symbol rate: 22000000
>
> You can leave all other values at default.
>
> Before running mythtv-setup make sure mythbackend is not running i.e. sudo
> systemctl stop mythtv-backend.service
>
> If  upgrading from 0.28 to 29 ppa you need to use sudo apt dist-upgrade
> (and not sudo apt upgrade as this will leave somethings not upgraded)


Let me put in another boot drive, get back to a semi-working state, try
these suggestions and get back to you.
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