MythBuntu 12.04 and V4L-DVB recompile with patch please help

**Morten ML** · May 3rd, 2012

Hi all

I am trying to make use of my tvtuner usb (PCTVSystems QuatroStick-nano 520e), but i can't figure out what to do.
From this page i gather that i should be able to use the digital part of the stick:
http://www.linuxtv.org/wiki/index.ph...tick-nano_520e

I assume I have to patch, recompile and install the V4L-DVB and when that is done i am good to go.

My problem is i don't know how to patch the V4L-DVB. From this page http://linuxtv.org/wiki/index.php/Ho...Device_Drivers - using the basic approach - I have to "... add the patch file as a line to the {kernel-version}_series file in the packports dir."
But i cannot find the "{kernel-version}_series" in the backports dir. (I assume that "packports" is a spelling mistake).

any help would be appreciated.

Thx in advance

/Morten

**gordintoronto** · May 3rd, 2012

There is a mythbuntu forum, you might get better responses there.

Good luck!

**najs** · May 5th, 2012

Hi Morten,

No, you don't have to compile any thing. Its a Perl script that needs to be patched. It is easier to use the alternative solution mention on that page.

Alternatively, you can download the extracted firmware directly from this link

Download the firmware file from the link and store it in /lib/firmware
Make sure you name the file dvb-demod-drxk-pctv.fw otherwise the device driver won't find it.

I also got the same usb tvtuner and I have the DVB-T tuner working successfully.

/najs

**Morten ML** · May 6th, 2012

Hi Najs, G and new viewers

@Najs:
Thx for your reply. Nice to know somebody has it working - if you hadn't posted I probably would have given up. Can you confirm that 11.10 works or did you use another version of MythBuntu?

This is not a solution but simply my progress.
Short answer:
MythBuntu 12.04 (both 32 and 64) detects the 520e in another way than Mythbunty 11.10. This other way doesn't work atleast for DVB-C. So use 11.10 64 bit instead – haven't tried 32 bit.

Long answer:
I tried the following on Mythbuntu 12.04 32 and 64 bit and on Mythbuntu 11.10 64 bit.

I downloaded the file "dvb-demod-drxk-pctv.fw" from http://www11.zippyshare.com/v/178270...d-drxk-pctv.fw
link to it from here:http://www.linuxtv.org/wiki/index.ph...tick-nano_520e

Copied it to the /lib/firmware/ using sudo.

From http://www.linuxtv.org/wiki/index.ph...Device_Drivers
I got:

Code:

sudo apt-get install git
git clone git://linuxtv.org/media_build.git
cd media_build 
sudo apt-get install patchutils libproc-processtable-perl
./build

Now reboot.

After this the command "lsusb" showed:
Bus 001 Device 002: ID 2013:0251 Unknown (Pinnacle?)

and "ls -i /dev/dvb/"
total 0
drwxr-xr-x 2 root root 120 May 5 18:54 adapter0
(adapter0 in blue)

both commands the same on all OS, but when entering Mythtv backend the screens differ.

I should also state that i downloaded the "New Mythbuntu
Install" for all versions. (http://www.mythbuntu.org/downloads)

On a side note I also had the "PCTV Hybrid Stick Solo 340E" connected at the same time as the 520e, which seemed to be the reason why i couldn't detect any DVB-C channels with both sticks connected in 11.10 64 bit.

My challanges are now that after changin from DVB-T to DVB-C for the 520e i cannot change back – this is actually not a big problem, since i wanna use DVB-C but still i shoudl be able to.

The other challange
is getting the channel scan to work.
Where I am, the frequency is 143 MHz, Modulation is QAM64, symbol rate is 6875000 S/s and network ID is 999.
In Myth i can not enter the Network ID and becouse of this I can get a lock on the channels but they allways “timed out” and i get the message “Failed to find any channels”.

I have made some “Transports” which i believe i shouldn't have i believe.
(from this link: http://www.mythtv.dk/viewtopic.php?id=38 It's in danish).

From this link it seems i have to do an awfull lot just to delete my transports:
http://wiki.indie-it.com/index.php?t...ls_Then_Rescan

If anybody has some ideas please let me know.

If a mod drops by and think this belongs in Mythbuntu forums feel free to move it.

And maybe this should be reported as a bug in MythBuntu 12.04? - I don't know how to do that, so feel free to do it for me

/Morten