Re: Hauppauge HVR-930C problems

[Fredrik Lingvall <fredrik.lingvall@gmail.com>]

On 12/25/11 16:56, Fredrik Lingvall wrote:
> On 12/18/11 10:20, Fredrik Lingvall wrote:
>> On 12/17/11 20:53, Mihai Dobrescu wrote:
>>>
>>>
>>>
>>> Mihai,
>>>
>>> I got some success. I did this,
>>>
>>> # cd /usr/src (for example)
>>>
>>> # git clone git://linuxtv.org/media_build.git
>>>
>>> # emerge dev-util/patchutils
>>> # emerge Proc-ProcessTable
>>>
>>> # cd media_build
>>> # ./build
>>> # make install
>>>
>>> Which will install the latest driver on your running kernel (just in 
>>> case
>>> make sure /usr/src/linux points to your running kernel sources). Then
>>> reboot.
>>>
>>> You should now see that (among other) modules have loaded:
>>>
>>> # lsmod
>>>
>>> <snip>
>>>
>>> em28xx                 93528  1 em28xx_dvb
>>> v4l2_common             5254  1 em28xx
>>> videobuf_vmalloc        4167  1 em28xx
>>> videobuf_core          15151  2 em28xx,videobuf_vmalloc
>>>
>>> Then try w_scan and dvbscan etc. I got mythtv to scan too now. There 
>>> were
>>> some warnings and timeouts and I'm not sure if this is normal or not.
>>>
>>> You can also do a dmesg -c while scanning to monitor the changes en the
>>> kernel log.
>>>
>>> Regards,
>>>
>>> /Fredrik
>>>
>>>
>>> In my case I have:
>>>
>>> lsmod |grep em2
>>> em28xx_dvb             12608  0
>>> dvb_core               76187  1 em28xx_dvb
>>> em28xx                 82436  1 em28xx_dvb
>>> v4l2_common             5087  1 em28xx
>>> videodev               70123  2 em28xx,v4l2_common
>>> videobuf_vmalloc        3783  1 em28xx
>>> videobuf_core          12991  2 em28xx,videobuf_vmalloc
>>> rc_core                11695  11
>>> rc_hauppauge,ir_lirc_codec,ir_mce_kbd_decoder,ir_sanyo_decoder,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_rc5_decoder,em28xx,ir_nec_decoder 
>>>
>>> tveeprom               12441  1 em28xx
>>> i2c_core               14232  9
>>> xc5000,drxk,em28xx_dvb,em28xx,v4l2_common,videodev,tveeprom,nvidia,i2c_i801 
>>>
>>>
>>> yet, w_scan founds nothing.
>>
>> I was able to scan using the "media_build" install method described 
>> above but when trying to watch a free channel the image and sound was 
>> stuttering severly. I have tried both MythTV and mplayer with similar 
>> results.
>>
>> I created the channel list for mplayer with:
>>
>> lintv ~ # dvbscan -x0 -fc /usr/share/dvb/dvb-c/no-Oslo-Get -o zap > 
>> .mplayer/channels.conf
>>
>> And, for example,  I get this output from mplayer plus a very 
>> (blocky) stuttering image and sound:
>>
>> lin-tv ~ # mplayer dvb://1@"TV8 Oslo" -ao jack
>>
>
> I did some more tests with release snapshots 2011-12-13, 2011-12-21, 
> and 2011-12-25, respectively. I did this by changing
>
> LATEST_TAR := 
> http://linuxtv.org/downloads/drivers/linux-media-LATEST.tar.bz2
> LATEST_TAR_MD5 := 
> http://linuxtv.org/downloads/drivers/linux-media-LATEST.tar.bz2.md5
>
> in linux/Makefile to the corresponding release.
>
> Results:
>
> * linux-media-2011-12-13.tar.bz2
>
> The ./build script builds the drivers cleanly, scanning works, but  
> watching video does not work correctly.
>
> * linux-media-2011-12-21.tar.bz2
>
> The ./build script fails at the as3645a.c file (on this machine but I 
> can build it on two other machines using the same kernel and kernel 
> 2.6.39-gentoo-r3, respectively). I can build it with make menuconfig 
> etc (where I disabled stuff I don't need, eg. disabling [ ] Media 
> Controller API (EXPERIMENTAL) ). The em28xx generate a kernel core 
> dump though [1].
>
> * linux-media-2011-12-25.tar.bz2
>
> Same problem as 2011-12-21.
>
> Regards,
>
> /Fredrik
>

Here's some more test results.

I have upgraded the kernel to 3.1.6-gentoo (where I enabled DVB when I 
build the kernel). Both

http://linuxtv.org/downloads/drivers/linux-media-2012-01-07.tar.bz2

and

http://linuxtv.org/downloads/drivers/linux-media-2012-01-08.tar.bz2

now builds using the

lin-tv ~ # cd /usr/src
lin-tv src # git clone git://linuxtv.org/media_build.git
lin-tv src # cd media_build
lin-tv media_build # ./build
lin-tv media_build # make install

method. Scanning and (finally) watching video works but not flawlessly.

I also suspect that I don't find all channels when I scan. I have 
scanned using,

* dvbscan -x 0 -fc /usr/share/dvb/dvb-c/no-Oslo-Get > 
.mplayer/channels.conf
* Kaffeine  (1.2.2)
* MythTV (0.25_pre20120103)

respectively. Both kaffeine and mythtv reports a very low signal level 
(0%) and an SNR of only 1%. (kaffeine). I'm not sure if the driver 
reports this correctly though.

Whatching live TV works on some channels but not all. HD channels seems 
more difficult than SD channels,  and I have not figured out why some 
channels work and some don't. I get

Signal 0% | S/N 2.6dB | BE 0 | (_L_S) Partial Lock

and no video on many channels in mythtv.

Regards,

/Fredrik