WiDi Latency Issue

[Fantastic Anarchist]

Okay, I have Windows 8 and after a couple of hours downloading the necessary drivers and software for my already installed WiDi, I finally got it to connect to my HD TV to use as a second monitor.

Now, there's about a 4-5 second lag between actions on my laptop and what appears on my TV.

The reason I had to download all of the drivers and other software from Intel was because there is apparently a problem with Windows 8 and HD TVs.

I've been told to revert to Windows 7 drivers, but I'm afraid that will just make it not work again. I can live with the latency, but I don't want to lose a couple of hours work for nothing!

So, I'm just throwing it out there in case someone else had the same issue and has a different solution.

The specs on my laptop are (sorry about the copy/paste; at work and can't remember all of them):

Includes Inspiron 17R Special Edition i17Rse-3589BK notebook
2.4GHz Intel Core i7-3630QM quad-core processor with 6MB cache
Intel HM77 chipset
17.3" diagonal FHD widescreen display
8GB DDR3 1600MHz memory
1TB 5400 RPM hard drive
2GB NVIDIA GeForce GT 650M graphics with Optimus technology

Specs on the HD TV (sorry about the copy/paste):

55LM6200 3D Smart HDTV, remote, Magic Remote, ribbon stand, six sets of 3D glasses
54.6" diagonal edge-lit LED display
Full HD 1920x1080p resolution
TruMotion 120Hz
FPR passive 3D technology
2D-to-3D, 3D-to-2D conversion
3D depth/viewpoint control
3D format auto correct, image correct, sound zoom
Dual Play-capable
16: 9 aspect ratio
6,000,000:1 dynamic contrast ratio
Triple XD Engine
Resolution upscaler
Seven picture modes
Three A/V modes
Picture Wizard II
Built-in Wi-Fi
DLNA-certified
Intel WiDi-ready
LG Smart TV: Home Dashboard 2.0, LG App store, Web browser, 3D content streaming, smartphone remote support
Two 10W speakers
Dolby Digital decoder
Virtual Surround
Seven sound modes
Clear Voice II

TV is fully updated. So, any thoughts?

[Fantastic Anarchist]

1. Just to add: Intel says:

That it doesn't recognize my graphics card. However, it does connect. So now there's latency - could this be the culprit? I don't want to change this if I don't have to.

[Fumesucker]

2. Do a full backup before you revert to the old drivers and you won't lose your work

If the old drivers don't work just do a restore and you'll be right back where you are.

[Fantastic Anarchist]

3. Thanks! I hadn't even considered that.

Appreciate your reply.

[Gore1FL]

4. Go into the Nvidia control panel (it should be in the system tray)

verify that you are pointing to the nVidia GPU and not the sandy/ivy/whatever bridge for graphics. Anything that says "auto select" change to nVidia.

[Fantastic Anarchist]

5. What does that do? Isn't Ivy Bridge my i7 processor?

So, I don't want it pointing to my CPU processor, but my GPU processor? Is this correct?

I appreciate the response, and if it's that easy, holy crap!

Edit: I'm at work, but when I get home, I'll let you know how it works out. Again, thank you for the reply!!

[Gore1FL]

6. Ivy bridge provides video processing, but if you have an nVidia card, its GPU is better.

I don't know if it'll fix your issue or not, but it's worth a try.

[Fantastic Anarchist]

7. Thanks for the information.

I'll give it a go when I get home. Hopefully, it will do what it does.

[Fantastic Anarchist]

8. Well, it worked at first ...

... then reverted to about a 5-6 second delay.

I'm wondering if it's my TV that is not able to handle the processing?

[Gore1FL]

9. Perhaps

you might be able to test that by showing it at a much lower resolution. I would hypothesize that if the TV was not handling it would be more garbled looking than simply delayed--but I don't know.

Do you have any other wireless devices that may be causing issues? I don't know if there is a way to check the signal strength or not, but it might be worth checking.

I'd expect a little delay, but 5 seconds seems pretty high.

Do you run anything in the background that could be eating your CPU, GPU, or system resources. Your processor is pretty beefy compared to most mobile devices. The nVidia specs are nice as well. I don't know what could be eating through it, but it might be worth checking out your CPU, Memory, and network utilization while you have the WiDi link up. Compare that to the when it's not running, and that could give you a good indication of what changes.

In full disclosure, I haven't used WiDi. Does it go through a router, or direct to the TV? I would assume it's direct. If it goes through a router, you'd pick up some time by eliminating the extra hop with a direct wireless connection.

[Fantastic Anarchist]

10. Ahh, resource hogging.

With my quad core processor, I really didn't think about that. It does have turbo boost, too.

But now that you mention it, I did have Outlook 2013 and Chrome with about 50 tabs open. Even my robust processor and 8 GB RAM would be doing some lifting while using WiDi.

The WiDi is direct to the TV (both are on the same wireless network).

I think you may have nailed it - I really didn't think about system resources. My phone plays YouTube directly to the TV, as well - with no lag. So, the culprit may be too many things running on my laptop.

What I'll do is run System Mechanic to clear everything (it does so regularly). Reboot, make sure nothing is running, and then try the WiDi with minimal resources being used. I may even use a dummy profile while doing it.

I wouldn't mind a 1 second delay - I would think that's natural - but like you said, I do have great CPU and GPU, so I should minimize the lag (unless it's some unexplained thing with my TV).

When I go home, I'll try it and keep you updated.

I really appreciate your help!!



Edit to add: I do have a wireless booster dongle thingy (like the technical term there?) on my laptop. It does boost my wireless signal on my laptop to around 95%, so that shouldn't be an issue, I wouldn't think.