Michael Davis | 1 May 19:20 2011
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Re: MythTV HD Setup

A few other things I've discovered about the IonITX board:

* I couldn't work out why cpufreq wasn't working ... until I read that the Atom does not support CPU Frequency
Scaling, d'oh!

* mythtv-backend was segfaulting on initial startup during boot. I worked out this was because the driver
for my DVB-S2 card loads firmware, and if the myth backend is started before this has completed, it
crashes. The fix is to edit /etc/init.d/mythtv-backend, add "microcode.ctl" to the Required-Start:
line, then run "update-rc.d mythtv-backend defaults". This ensures that the myth backend waits until
the microcode is loaded before trying to start.

I wrote a MySQL script to update the channels database with the correct Radio Times XMLTV ids, I'll post it if
anyone is interested.

Now just need to get lm-sensors working and I think I'll be done!

Michael Davis | 2 May 18:20 2011
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5.1 surround sound and HDMI

OK, I have discovered a problem with my new MythTV box that I haven't figured out the solution to yet.

Stereo recordings play back fine--that includes all SD recordings and perhaps some HD content. However, I
can't get 5.1 surround sound to play back.

Working with Doctor Who, recorded on BBC One HD. There are two audio channels with the broadcast, stereo and
5.1. I think the 5.1 is Dolby Digital AC3, need to check that. The stereo channel plays fine, as does the 5.1
channel if I downmix to stereo. But I can't get it to play as surround sound. My TV says it supports both DTS
and Dolby Digital so it ought to work.

Depending on the options I select, I either get left and right channels only (which in Doctor Who gives me the
soundtrack but no dialogue), or silence, or repetitive hissing white noise.

I'm assuming the white noise is DTS passthrough, which ought to be correct, but my TV isn't decoding it.
Maybe the format isn't right for the TV and I need to remix it somehow (with dmix?)

I'm going to keep hacking away at this but does anyone has any suggestions how to troubleshoot it?

Michael Davis | 3 May 01:14 2011
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Re: 5.1 surround sound and HDMI

Actually looks like this might not be an ALSA problem at all, but a restriction of the TV. I found some info on
Samsung's website:

"From the information I have, the C450 (TV) will only support 2.1 audio out of the optical audio output when
processing a signal from a digital source (HDMI), but will support 5.1 output from a coaxial source (cable)."

That's annoying. And the mobo doesn't have an S/PDIF socket to connect directly to the amplifier.

--- On Mon, 2/5/11, Michael Davis <slithy@...> wrote:

> From: Michael Davis <slithy@...>
> Subject: 5.1 surround sound and HDMI
> To: belfastlinux@...
> Date: Monday, 2 May, 2011, 17:20
> OK, I have discovered a problem with
> my new MythTV box that I haven't figured out the solution to
> yet.
> 
> Stereo recordings play back fine--that includes all SD
> recordings and perhaps some HD content. However, I can't get
> 5.1 surround sound to play back.
> 
> Working with Doctor Who, recorded on BBC One HD. There are
> two audio channels with the broadcast, stereo and 5.1. I
> think the 5.1 is Dolby Digital AC3, need to check that. The
> stereo channel plays fine, as does the 5.1 channel if I
> downmix to stereo. But I can't get it to play as surround
> sound. My TV says it supports both DTS and Dolby Digital so
> it ought to work.
> 
(Continue reading)

Michael Davis | 8 May 19:26 2011
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More on IONITX G-E and MythTV

Not sure if anyone is still interested in my MythTV setup, but anyway here's a few comments now that the
system has been running for a couple of weeks:

VIDEO

In general, the IONITX G-E board performs really well. No problems recording HD content and it plays back
flawlessly, with no tearing. Even using OSD didn't cause any jitters.

There are some artefacts when skipping back or forward through H.264 recordings, I guess while the video
syncs to the nearest I-frame.

AUDIO

The board can put 5.1 or 7.1 sound out over the HDMI port, but I discovered that my TV downsamples this to
stereo before passing it along the optical cable, which is REALLY ANNOYING. But apparently it is a feature
not a bug, something to do with DRM and HDCP.

Also the board has no optical out. Some of the IONITX boards do have a S/PDIF socket but not this one, though
there is space for one on the mobo and ALSA reports one analogue and two digital devices, so the hardware may
be there. Perhaps just a case of soldering on a socket?

For the meantime I'm making do with stereo output and Dolby Prologic II, which is pretty good but not quite as
good as it could be with proper digital output.

Possible solutions:

- see if it's possible to solder on a S/PDIF port
- use an external soundcard (USB audio with S/PDIF output)
- is there a splitter or amplifier which can take HDMI in, decode the sound (or send it along an optical cable)
and pass the video on to the TV?
(Continue reading)

Patrick Dempster | 8 May 21:31 2011
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Re: More on IONITX G-E and MythTV

Thanks for the update Michael.

On 8 May 2011 18:26, Michael Davis <slithy-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
Not sure if anyone is still interested in my MythTV setup, but anyway here's a few comments now that the system has been running for a couple of weeks:
<snip>
 
SUMMARY

In conclusion, I'm really happy with this board. The only real problem I've had is getting AC3 sound to work, but that is a limitation of my TV.

Ryan Grieve | 9 May 10:12 2011

Re: More on IONITX G-E and MythTV

Yeah, thanks for the update, hoping to build myself a new media box in
the coming months so the details are more than welcome.

Ryan

On Sun, May 8, 2011 at 6:26 PM, Michael Davis <slithy@...> wrote:
> Not sure if anyone is still interested in my MythTV setup, but anyway here's a few comments now that the
system has been running for a couple of weeks:TV.
>

--

-- 
Ryan Grieve
http://ryangrieve.com
----
R-R-R-R-R-R-R-R- | R-R-R-R-R-R-R-R- | R-R-R-R-R-R-R-R- | R-R-R-R-R-C-R-R-
B-B-S--S-SBBS--S | B-B-S--S-SBBS--S | B-B-S--S-SB---S- | -SBBS--S-SB---S-

Pierre Droomer | 12 May 21:06 2011

Re: More on IONITX G-E and MythTV

Hi Michael,

I hope to build a setup in the not too distant future, so any comments are good.

Thanks
Pierre

 

----- Original Message -----

From: Michael Davis

Sent: 05/08/11 06:26 PM

To: belfastlinux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org

Subject: [blug-chat] More on IONITX G-E and MythTV


Not sure if anyone is still interested in my MythTV setup, but anyway here's a few comments now that the system has been running for a couple of weeks: VIDEO In general, the IONITX G-E board performs really well. No problems recording HD content and it plays back flawlessly, with no tearing. Even using OSD didn't cause any jitters. There are some artefacts when skipping back or forward through H.264 recordings, I guess while the video syncs to the nearest I-frame. AUDIO The board can put 5.1 or 7.1 sound out over the HDMI port, but I discovered that my TV downsamples this to stereo before passing it along the optical cable, which is REALLY ANNOYING. But apparently it is a feature not a bug, something to do with DRM and HDCP. Also the board has no optical out. Some of the IONITX boards do have a S/PDIF socket but not this one, though there is space for one on the mobo and ALSA reports one analogue and two digital devices, so the hardware may be there. Perhaps just a case of soldering on a socket? For the meantime I'm making do with stereo output and Dolby Prologic II, which is pretty good but not quite as good as it could be with proper digital output. Possible solutions: - see if it's possible to solder on a S/PDIF port - use an external soundcard (USB audio with S/PDIF output) - is there a splitter or amplifier which can take HDMI in, decode the sound (or send it along an optical cable) and pass the video on to the TV? - replace mobo with one of the other IONITX series which has S/PDIF on-board FREESAT CHANNEL LINEUP I deleted a load of crap channels and also found that many of the normal channels were repeated lots of times with consecutive channel no.s, so deleted extra ones as well. I wrote a MySQL script to update the channels database with the correct XMLTV ids for all the Freesat channels which are carried by Radio Times. Any other channels use the on-air guide. COOLING AND SENSORS The CPU is fanless and system load runs at about 1% even while recording or decoding video streams. It peaks between 2am and 8am when it's doing things like updating the listings and commercial flagging. I think with a bit of hacksawing I can make the heat pipe assembly in my Tranquil T2e case fit the CPU. The GPU has a fan which isn't very noisy but could be quieter. I've just ordered a 120mm fan to replace it with. The BIOS reports two temperature sensors (CPU + GPU). Although it's a dual core CPU there don't seem to be separate sensors for each core (CPU is on a single die). The coretemp driver reports two CPU sensors but only one of them returns a reading, like this: # sensors coretemp-isa-0000 Adapter: ISA adapter ERROR: Can't get feature `temp1' data! temp1_crit: 90.00 (temp1_crit) temp1_crit_alarm: 0.00 (temp1_crit_alarm) coretemp-isa-0001 Adapter: ISA adapter CPU Temp: 40.00 (temp1) temp1_crit: 130.00 (temp1_crit) temp1_crit_alarm: 0.00 (temp1_crit_alarm) I assume there is in fact only one CPU sensor (as reported by the BIOS), so I configured sensord to just ignore the first device. sensors-detect reported that I should use the lm90 driver (and i2c_nvidia / nvidia2_smbus) to read the mobo sensor, but I haven't managed to get this to work yet. Drivers load but sensors doesn't report anything. Using hddtemp I can read the HDD temp sensor (WD Caviar Green 1Tb) so I can view CPU and HDD temps using collectd. SUMMARY In conclusion, I'm really happy with this board. The only real problem I've had is getting AC3 sound to work, but that is a limitation of my TV.

 

Steven Wilkin | 24 May 13:00 2011
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25th May Meet

The last Wednesday of the month is upon us once again. Anyone fancy a
meet tomorrow (Wednesday 25th May) at 7pm in the Tap House?

Geoff Macartney | 24 May 22:06 2011

Re: 25th May Meet

I'll give it a go, haven't made it in a month or two; won't be there
till a bit after 7 though.

G

Picon
From: Steven Wilkin <iamthebiscuit@...>
Subject: [blug-chat] 25th May Meet
Date: 2011-05-24 11:00:04 GMT
The last Wednesday of the month is upon us once again. Anyone fancy a
meet tomorrow (Wednesday 25th May) at 7pm in the Tap House?
Steven Wilkin | 25 May 17:57 2011
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Re: 25th May Meet

I'm meeting up with some guys beforehand to talk about front-end web
engineering:

https://bitbucket.org/earnubs/fronteng/wiki/Home

It's at 6:30pm in the Rumble Labs office, 21 Ormeau Avenue and all are
welcome!

It should last an hour or so and I'll stop in the Taphouse after.

Steve

On May 24, 9:06 pm, Geoff Macartney <geoff.macart...@...>
wrote:
> I'll give it a go, haven't made it in a month or two; won't be there
> till a bit after 7 though.
>
> G
>
>
>
> [ Attached Message ]From:Steven Wilkin
<iamthebisc...@...>To:Belfast Linux User Group
<belfastlinux@...>Date:Tue, 24 May 2011 04:00:04 -0700
(PDT)Local:Tues, May 24 2011 12:00 pmSubject:[blug-chat] 25th May MeetThe last Wednesday of the
month is upon us once again. Anyone fancy a
> meet tomorrow (Wednesday 25th May) at 7pm in the Tap House?


Gmane