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processor and other information on the web indicates it was manufactured by 
RedSonic.   Which doesn't seem to exist anymore.  www.redsonic.com (as a 
domain) expires on the 18th of May.   And the registered authoritative dns 
servers for the domain don't carry any records.   Its possible that D-Link 
might be working with syabus to come up with some modern firmware for the 
units, as syabus does have uclinux installations that work with the same 
sigma processor.   But figure it more likely that they will kill the DSM-520 
product line and come out with something new.
I would bet money that since syabas lists D-link as a partner that the 
DSM-750 that is soon to be released is made by them.

----- Original Message ----- 
From: "stuart" <stuart at xnet.com>
To: "Discussion about mythtv" <mythtv-users at mythtv.org>; 
<craig at goranson.org>
Sent: Thursday, May 10, 2007 6:31 AM
Subject: Re: [mythtv-users] upnp pictures of screens


>
>
> Craig G. wrote:
>> I have the DSM-520 and it feels like an orphaned D-Link product.   Which 
>> is not surprising as the internals are not made by D-Link themselves. 
>> In a rough sense the DSM-520 works "ok" with mythtv, but it is VERY 
>> sensitive to encoding.  By sensitive I mean if you try to playback a 
>> MPEG-TS stream it tends to lock up if any of the frames are missing or 
>> corrupted.   This means if I run the content I record through 
>> mythtranscode to clean it up, then it plays ok with the DSM-520.   Have 
>> better luck with MPEG-PS files.   Right now if I record something from my 
>> HDHomerun have to transcode it to cleanup the MPEG stream before I can 
>> try to display it on my DSM-520, which is very inconvenient.   (streams 
>> play fine in mythtv, mplayer or even windows.  They just cause the 
>> DSM-520 to lock up hard.   The fact that there hasn't been a firmware 
>> update in over 8 months, and their have been no moves/attempts by D-Link 
>> to fix many of the bugs and deficiencies in the devices firmware.  I 
>> wouldn't recommend it.   If looking for a UPNP thin player, would 
>> recommended researching which was have the best support from the 
>> manufacturer and the most frequent updates.   As the support from D-link 
>> has been almost non-existent for their devices.
>>
>> Craig
>
> Hi Craig, I looked at the mythtv - dsm520 - wiki page: 
> http://www.mythtv.org/wiki/index.php/DLinkDSM520-UPnP and only found a 
> comment about failure to display 1080i material.  If you would like to add 
> something I would do it in the above URL.  If you are not sure of what you 
> want to add you can always add comments to the discussion page: 
> http://www.mythtv.org/wiki/index.php/Talk:DLinkDSM520-UPnP
>
> So, did you look inside?  Is there Sigma Design chip?  It could be that 
> the D-Link is a Sigma hardware box running Syabas software.  Which, 
> incidentally, is uCLinux based.
>
> If this is the case, you might try http://www.syabas.com to see if they 
> are supplying updates to their software for the D-Link.  If that doesn't 
> work, maybe the O.E.M. of your hardware is http://macpower.com.tw. It's a 
> sure bet they are for the Galaxy 3500 IPTV (which they call the D7 & D8 
> Digital Media Gateway).
>
>
>
>