Issues with wifi after Android firmware update? (KD-55XD8577)

[chomerly]

I don't know if anyone else has experienced this issue but i'm having internet connection issues with 5Ghz wireless on my TV.

My model, KD-55XD8577, just stopped communicating with my router last night, which is positioned about 12 feet opposite my TV with no obstructions.  I didn't notice it at first as i was watching normal television but when i switched over to watch something on YouTube i was greeted with a message telling me that there was a connection error.

This led to me spending the next 2+ hours trying to diagnose the issue, restoring the TV back to factory settings and eventually restoring my router back to it's factory settings, to cut a long story short.

Every other device in my home that supports 5Ghz wifi works without issue.  In fact, my Surface tab which i am using right now to create this post is connected this way.  I did manage to get the TV connected to the internet for about 20 minutes last night but it lost the connection again, with no explanation why.

I got up this morning and checked the TV again to see if anything had changed but this issue was still happening.  It was at this point that i decided to check if 2.4Ghz wireless was having the same issue.  As soon as i switched over to 2.4Ghz it worked immediately and i was able to do everything as normal again.  I then decided to take a look on the forums to see if this is happening to other people with this, or similar Android models.  While navigating to the threads i noticed a post talking about the new Android firmware update and that it was released yesterday 19 April 2017.  This immediately got me thinking that this can be the only reason why my TV suddenly stopped connecting to the internet via 5Ghz wifi.  My TV has automatic updates turned on so I can only assume that the new firmware (PKG3.533.0108EUB) is the cause for this as it would be the only thing that had changed.  My TV worked fine on both wireless modes before yesterday but since the firmware update only 2.4Ghz works without issue.

Now, this brings me to ask the question, where does this leave people like me when we are unable to connect our TV's via an RJ45 network cable, and can't use 5Ghz wifi in order to watch 4k content via Amazon and/or Netflix?

Also, when can we expect to get a fix for this?

Yes, i know you can still watch 4k content via 2.4Ghz but 5Ghz gives peace of mind when there are more devices in the household that utilise 2.4Ghz.

In any case, i am not a happy about the fact that my TV has been reduced in its capabilities via a simple update.  And making the case that i still have 2.4Ghz and a wired option simply doesn't cut it as an excuse. I purchased the TV with the capabilities mentioned in its description and, considering i have only had the TV for a month, i expect to be able to use those capabilities as and when i please.

[SpireiteJim78]

This may be totally unrelated but sometimes my wi-fi drops out and there is no way to get it back. After trying numerous things and many hours the solution I came across was a setting for the IPV which uses either IPV4 or 6. There is an option to turn off IPV6 once I do this the wi-fi is back up again and running perfect.

Like I said this may be unrelated but doesnt hurt to try.

[chomerly]

Sorry for the late reply.

I haven't tried to reconnect the TV via Wi-Fi since this issue manifested itself as I have had to resort to running a network cable in order to get a stable, fast connection.  Also, there was an update pushed out today and have just finished installing it.  I will have to try it when I get chance and update accordingly. 

[Anonymous]

Hi there

My advice is if you can stick to the wired ethernet connection - I would.  Especially if you do alot of streaming.

Cheers

[danvaida]

FWIW, I had the exact same issue happening yesterday evening.

Auto updates were not on, though.

I am updating to the latest version now, hoping that this will solve the issue.

[1000grms]

Ive had the same problem since the lastest update never had this problem before and i have had my tv for almost a year....Now i have to unplugg from the mains to get it to work again...

[danvaida]

So, I updated to the latest available version and it didn't help.

I can only connect to 2.4GHz networks. I can't connect to 5GHz anymore.

Dear Sony, please provide a reason for this limitation/downgrade.

It is completely unacceptable as the technical specification of the device is not respected.

Unless this gets fixed I intend to report the issue to the customer protection service and have the TV replaced or get a refund.

[chomerly]

Thank you for updating this thread with rregards to this problem.

I haven't tried 5Ghz WiFi since the update as i have used a cable instead.  I have been in touch with the store i purchased my TV from but i am still waiting on a response.  Sony haven't gotten back to me and now the store is taking the proverbial pee.

Part of me is beginning to think i should have chosen a different brand television, with Android, but hindsight is a beautiful thing.

[Anonymous]

Hi @danvaida

In your router settings have you separated the 2.4Ghz and 5Ghz bands into 2 SSIDs (you will have to name them differently)?  If/when you do so, can you see the 5Ghz SSID on the TV?

Also try changing the wifi channel on the 5Ghz band.

Cheers

[danvaida]

Hi @Anonymous and thanks for your message!

Yes, they are two separate SSIDs. The SSIDs are hidden, on purpose.

I did try to change it to all supported channels... it's the latest (also model and firmware) AirPort Extreme. Works like a charm for 2 Apple TVs, iPhones, iPads, MacBooks... and even for the Sony TV... till 2 days ago. Quite frustrating I must say...

The TV's auto-download of updates was off, though. It started having this issue, so I went and applied the latest update. That didn't fix it. But hey, now I have some new, cool screensaver... nice (not).

I tried graceful reboot, hard reset, disabling wifi adapter...

Thanks again for helping.