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Wifi connection freezes Dreambox


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#1 ip_gr

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Posted 3 December 2015 - 10:35

Hello,

 

I have the following problem with my DM8000:

 

First I flashed the OpenATV image. I connected the dreambox via Wifi to the network. As I switched to a stream the box freezes. Also all network connections were broken. The same happens if you try to upload a huge amount of data (e.g. Picons) to the dreambox.

This behaviour is only reproducible when the dreambox is connected via wifi. If the box is connected over a cable, there is no problem.

 

Yesterday I flashed a OpenPLI 4.0. And I could see the same behaviour as with the OpenATV image.

 

To ensure that it is not a hardware problem, I flashed also an original DMM image and also a Merlin image. With this two images I had not that kind of behaviour.

 

In the OpenATV forum I find (at least) another person you has the same behaviour as described.

 

Are we doing something wrong? Has anybody a suggestion how to solve it (except "connect the box via cable" :) )? Could somebody look to it please?



Re: Wifi connection freezes Dreambox #2 Jan Gruuthuse

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Posted 4 December 2015 - 08:03

You are operating at the limit of your wifi.

- Try raising your wifi dongle with a short good shielded usb extender cable. Point your wifi dongle to the wifi router, see if you get a better connection. direction of dongle could be important: long side upright or lying down, rotate 45° on long axis.

- If you have an android phone/tablet install Wifi analyzer by farproc from google play. This could help you with direction and channel usage. (using another channel on WiFi router could improve your traffic over Wifi)


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Re: Wifi connection freezes Dreambox #3 ip_gr

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Posted 4 December 2015 - 08:24

I don't know if I am at the limit... The wifi AP is in the same room! And all devices which are connected shown the full wifi reception!



Re: Wifi connection freezes Dreambox #4 Jan Gruuthuse

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Posted 4 December 2015 - 09:06

Bottleneck in Wifi? Switch off all devices in room, except Wifi router and Wifi Dongle DM8000. If no freezes: see if you can prioritise Wifi traffic on WiFI Router to DM8000. If not a solution: lan cable only solution.

 

The first (and possibly most important) recommendation is not to use WiFi at all for fixed devices. You should connect fixed devices (such as PCs, games consoles, smart TVs, network streaming devices, DVD/blu ray players and set-top boxes) to your router using Ethernet cables. The absence of unsightly wires and the perceived ease of implementation with WiFi may have appeal. However, there can be a major performance price to be paid for convenience, and it can be easy to hide wires. Wired connections will always provide the best performance possible.

source: WiFi Optimisation Guide – how to improve your WiFi connection and speeds


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Re: Wifi connection freezes Dreambox #5 ip_gr

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Posted 4 December 2015 - 09:33

I tried this. But the same behaviour! The strange thing is that with the original DMM image or Merlin I have no problems!



Re: Wifi connection freezes Dreambox #6 goldeneye

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Posted 4 December 2015 - 09:34

Dit probleem speelt al langer... Ook mijn boxen boven draaien op een WiFi bridge. USB dongles werkten niet 100%. Dit had alles te maken met de beroerde ontvangstkwaliteit door veel te kleine antennes en zwakke stroomvoorziening qua USB. Probleem verergerde zich als er buiten de USB WiFi dongle ook nog andere USB aopparaten op de box waren aangesloten (in mijn geval een Smargo kaartlezer). Omdat bij mij bekabeling niet handig was, heb ik gekozen voor een WiFi Bridge met normale snp antenne (de Linksys WET54G). Deze draait tot op de dag van vandaag uitstekend..

 

Probleem is dat de boxen geen resume (lijken te) ondersteunen. WiFi valt weg door te zwak signaal (of wordt weggedrukt door een ander WiFi station). De box onderbreekt op een "vuile" manier en dat kunnen de STB's niet meer corrigeren. Enige wat dan helpt is een herstart van het netwerk (als je mazzel hebt) of een reboot van de box. Nog vervelender is dat bij overdracht van data als picons of zelfs films de bestandssructuur corrupt maakt waardoor de problemen alleen maar verergeren. Na zo'n vastloper zou je eigenlijk meteen een filecheck moeten uitvoeren....

 

WiFi is eigenlijk alleen handig als je kleine zaken als home sharing wil toepassen.. Dat werkt meestal wel goed zolang de verbinding actief blijft of minder dan 10 seconden uitvalt....



Re: Wifi connection freezes Dreambox #7 ims

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Posted 4 December 2015 - 09:55

But as he wrote - it making on ATV and PLi images only... then it will not be problem with Wifi signal !


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Re: Wifi connection freezes Dreambox #8 Meega

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Posted 4 December 2015 - 10:14

My dm8000 also loose connection while the ap is standing next to it.
Tried it only for fallback tuner. (hickups on cable)
Box freezes randomly in time, no longer than 2 minutes do, and I have to restart.

But I know, dmm :P

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Re: Wifi connection freezes Dreambox #9 Jan Gruuthuse

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Posted 4 December 2015 - 10:18

Yeah: OpenPLi and ATV is the issue. Always a story of and, and, ...

Stay on DMM image or Merlin; or use cable: problem solved.


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Re: Wifi connection freezes Dreambox #10 ip_gr

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Posted 4 December 2015 - 10:18

@goldeneye

sorry I do not speak dutch

 

ims said it already. This beaviour occurs only in ATV and PLI images.



Re: Wifi connection freezes Dreambox #11 Jan Gruuthuse

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Posted 4 December 2015 - 10:24

@goldeneye

sorry I do not speak dutch

 

ims said it already. This beaviour occurs only in ATV and PLI images.

not 100%: https://translate.go...ox/#entry517296

 

 

 

 

OpenPLi stops actively supporting Dream Multimedia STB’s.

OpenPLi stops actively supporting Dream Multimedia STB’s With the decision of Dream Multimedia to abandon open source for their STB’s, our motivation for dealing with the consequences of that has dwindled. This has gotten to the point that we are no longer willing to apply Dream Multimedia specific patches, which is why we do not […]

source: http://openpli.org/


Edited by Jan Gruuthuse, 4 December 2015 - 10:27.

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Re: Wifi connection freezes Dreambox #12 ip_gr

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Posted 4 December 2015 - 10:36

thank you for the translation...

 

The problem is, I can not use a cable connection because of the cable... The router is in the same room but it would look ugly with the cable...

Yes openpli has stop the support of dmm but this seems to be a bug in PLI-images! it's not a new feature...



Re: Wifi connection freezes Dreambox #13 goldeneye

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Posted 4 December 2015 - 11:09

Believe me... It's not a bug.. It is simply the WiFi signal being to poor. The Tx/Rx antenne inside the dongles is too small for any sustainable performance. The other problem being the STB's themselves. They 'throw around' a lot of distortion harmonics disrupting the WiFi signal. I have tried many many dongles and all failed.. Using a WiFi Bridge with normal size antenna (and as far away from the STB as possible) is the only way to get a stable WiFi connection provided your channel is not disrupted by other WiFi sources nearby... As said: Using a WiFi Bridge on my DM800SE and DM800SE-V2 works perfectly (even watching a HD movie on my server DM8000)..

 

In short: WiFi dongles will never provide a stable connection on these STB's no matter what image you use...



Re: Wifi connection freezes Dreambox #14 ip_gr

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Posted 4 December 2015 - 11:24

Ok I believe you! Although as I said the AP is in the same room...

But then I do not understand, why I do not have any problems with original DMM/Merlin image but only with PLI-images and PLI-based images like ATV! Why is it so?



Re: Wifi connection freezes Dreambox #15 Jan Gruuthuse

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Posted 4 December 2015 - 11:28

cat6 flat Ethernet cable.


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Re: Wifi connection freezes Dreambox #16 ip_gr

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Posted 4 December 2015 - 11:45

cable connection is not an option!



Re: Wifi connection freezes Dreambox #17 Jan Gruuthuse

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Posted 4 December 2015 - 12:25

Last solution buy a set of ethernet powerline adapters: The 18 best Powerline adapters 2015/2016 UK


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Re: Wifi connection freezes Dreambox #18 ip_gr

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Posted 4 December 2015 - 12:43

Thank you very much so far for your suggestion!

 

Unfortunately using PLI-/PLI-based images is not possible for me because of the not working wifi connection! In my opinion it does not make sence to buy other devices just to have a workaround for the bug in the image. I will flash the original dmm image!

 

By the way even if the wifi is at the limit, that should not freeze the device...


Edited by ip_gr, 4 December 2015 - 12:47.


Re: Wifi connection freezes Dreambox #19 malakudi

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Posted 4 December 2015 - 13:52

What is the chipset of the embedded wifi on DM8000?



Re: Wifi connection freezes Dreambox #20 WanWizard

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Posted 4 December 2015 - 14:04

It is a common misconception to assume that if you wifi client is directly next to the AP, you will get an optimum connection.

 

Problem 1:

 

Wifi is, like the old hubs, a shared medium. So the radio in the AP has to devide its time between all connected wifi clients. This means your client is not getting the full connection, it is getting a timeslot. Depending on the number of other clients and their connection, this could mean a high and variable jitter, and getting only a slice of the available bandwidth.

 

Problem 2:

 

The radio in the AP can only work on a single speed. That means that even if your client is next to the AP, and reports a 150Mbps connection, you could actually have only a 1Mbps connection, because there's an iPhone in your son's bedroom that is also connected, and causes the radio in the AP to scale back. Most people with only one AP in the house and multiple wireless devices suffer from this problem. Especially smartphones are a problem, since their radio is very weak.

 

Because of this, the connection could also differ hugely throughput the day, since the number of connected clients, and the location of those clients, could vary.

 

At the same time, streaming is a realtime business. And unlike streaming youtube on your PC, there isn't a lot of buffering going on in the box. And the less memory a box has, the less buffering in happening. So if you have a network connection with variable throughput and high jitter (variation in latency), steaming over wifi is bound to fail.

 

Which is why it is advised not to use wifi unless you know exactly what you are doing, and you have designed your wifi network accordingly.


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