Internet speed drops when I duplicate my monitor to my TV

[ntg]

Anyone ever experienced this?

I have my pc connected to my TV so I can watch videos etc on my TV. Whenever I duplicate my screen to the TV my internet speed pretty much dies, nothing downloads and webpages time out.

I got a sky hub. Never used to happen with my BeBox.

As soon as I change the screen setting back to my monitor the speed automatically picks up instantly.

any thoughts?

 

[ntg]

Is this a connection over network or actual visual input(HDMI,VGA,etc)?

HDMI straight from my GPU to the TV, and another HDMI to my Monitor. Computer connected to the Sky Hub via Ethernet cable.

 

[ntg]

My first thought is "I don't believe you"

You're not hitting a hotkey that enables wireless and connecting to an old router that has no web connection or anything like that are you?

Nope, I'm switching my monitor view as I've always done it (Windows 8.1) through the screen resolution, clicking on 'duplicate my screens' and I get my monitor image on my TV as well.

Trying to access websites times out almost always and downloads slow down to a few kb/s - but the connection does not drop.

I only started getting this when I got the Sky Hub but can't fathom why it would make a difference.

Once I switch back to single monitor on my pc the speed picks up and pages load (even without re-loading them manually).

It's bizarre.

 

[ntg]

Do you close the laptop lid? My signal drops if I do.

It's a desktop.

Is the connection to the router that has the problem, or the actual internet connection?

Are Powerline adapters involved?

No powerline adapters. Not sure how to tell the difference between router and internet connection. I just get time outs on websites and my downloads immediately dive.

The only thing that has changed is my bebox to sky hub, nothing else, at all. That's why I'm trying to figure out how the Sky router could affect this.

 

[ntg]

Have you got any other devices attached to the router, even a smart phone would do? Do they suffer from the same problem at the same time?

Haven't checked. I usually have my sphone connected to wifi but haven't happened to check it when it happens. The question is why the change of monitors would affect it?!

 

[ntg]

Have you tried using just the TV as a monitor to see if that has the same affect?

Not certain but I think I did and it had the same effect.

 

[ntg]

Interference, Does the hdmi cable to the tv run along side the rj11 cable for the broadband?

Most likely, I'll check that today and report back.

 

[ntg]

Setup up 2 command prompts, one pinging your router, one pinging external (eg 8.8.8.8).

router works ok
internet times out

RJ11 leads are generally flat cables and have zero interference rejection but you would expect the HDMI cable to be well screened and contain its own signals.

Be interesting though to see the result of this.

took the cable around the desk, still same problem, no change. Btw, this would have happened with the previous router as well, not just the new one, so interference can't be it.

I'm dling the latest drivers to see if that changes anything.

 

[ntg]

Is the router plugged to the mains away near the television?

Yes it is plugged right next to where my tv is plugged. Just as my previous router.

Hold winkey, tap P. Shortcut for changing screens

what dif does it make if I go through the screen resolution menu?besides I don't want to change screens, I want to duplicate them.

 

[ntg]

Sounds like your phone line is picking up RF interference being generated by the TV itself.

This can happen even when your router is quite a distance from the interfering kit if there are phone extensions around. ADSL filters are meant to reduce this, but you're still dealling with a phone wiring system designed the previous century. The bellwire in your phone cabling isn't needed by ADSL but is great (unwanted) antenna for interference.

I had this with a old microwave which would clobber the internet while my brothers lasagne was doing cooking. Soon as the pinger.. pinged, then the iPlayer would return to normal. Doesn't mean it was leaking microwaves, just good old fashioned RF interference.
Sounds mad, but totally repeatable (with enough lasagnes).

Could be down to the sensitivity of the ADSL chipset in the router. Moving to a Billion router from my ISP supplied one boosted my pitiful 2mb to 2.6mb.

I take it that its not Duplicate/Extend that's the problem, and it doesn't return to normal if you Only have the TV... because that would be even more bonkers.

that sounds plausible..probably the router internals react to it..bloody thing..

 

[ntg]

so what happaned if you just run on that 1 screen?

If I run it on the TV the internet dies.
If I run it duplicate the internet dies.
Only when it's on my desktop ONLY it works ok.

 

[ntg]

Enable duplicate output but keep the actual TV turned off. Does it still happen? If it does it's got nothing to do with interference from the TV.


Sometimes almost similar happens to me when I turn off my PC improperly by cutting power rather than shutting down. It spazzes out the whole network for some reason no packets get routed to anywhere until I turn my computer back on.

good idea ill try this.

Have you tried a different HDMI cable from PC to TV. A simple check and probably an unlikely cause but still worth a quick check none the less.

that'll be my next move..its just too suspicious that it started happening with the skyhub only.

What about if the TV is switched on and getting a broadcast TV signal displayed . Does it still drop internet then?

If the TV were dropping noise onto the mains wiring it'd be from the smps so will be fairly low frequency compared with the majority of ADSL signals.

The ADSL filter would not attenuate these signals and besides the signal to the modem is unfiltered. Only the phone signal is filtered.

If the internet works with the TV showing bbc1 or something then its less likely to be the TV power supply. Ideally you'd need to drive the TV with a like for like signal eg 1080p @60Hz.

i use the same signal for both - always have. It can't be that as it used to work just fine without any change.

 

[ntg]

Do the tv and laptop support network over hdmi? Could be the tv taking part of the connection or the laptop hooking into the tv's wireless.

Its a desktop, not a laptop. I dont think they do support that. Also no, the desktop is not connecting to the TVs wireless.

 

[ntg]

so i moved the router far away and everything works ok. it was interference from the poor quality sky hub after all.

thx all for the ideas.