I posted this a few months ago but here's a quick summary. It would be nice if you could disable the ad-hoc network if you weren't using the WiFi remote but that still leaves the problem for those of us that USE it. Now, if you're NOT using the WiFi remote, you could always go wired on the TV and eliminate the ad-hoc (turns off the wireless radio)! However, I'll presume that's not acceptable to you and frankly, after recently suffered a lightning strike, I'm unwiring as much as possible! HOWEVER, you could also buy something like this to eliminate the use of the TV's wireless radio while still being wireless. I use these on my AV receivers without built in wireless (set device to client mode).
For me, the best solution would be an app like DTV has and an IP web interface for control but I digress
If none of the above interest you, .....
I use an old wireless router and set it up specifically for my TVs. In your post you said 1, 5, and 11 for the channels. I'll presume that's a typo because the 3 non-overlapping channels are 1, 6, and 11. Anyway, I use one of these channels for my "normal router" and one of the other two channels for my TVs. I'm fortunate in that I don't have any interference on any of the channels. You may not be so lucky.
This keeps all the ad-hoc communications off my normal network and they don't interfere with my connections (other than the TV).
Until Vizio provides a web interface and/or more control, that's the best I can offer up.
Originally Posted by bmcleod
While your problem is easy to solve, I have had continued interference from the DIRECT-II-VIZIOTV AdHoc network. Using inSSIDer and iStumbler I can see that this network follows your primary WiFi channel regardless of where it's set. The only solution I've found is to unplug the TV, at that point the interference with my AirPlay streams ceases.
I opened an incident with Vizio about a week and a half ago, so far their best recommendation is to move my primary WiFi to a channel other than 1, 5, 11. This doesn't make much sense as I stated that the AdHoc network follows anyway, it also doesn't take into account the other channels being used in my neighborhood and the overlap that this causes with them (inSSIDer goes red with warnings). For the record I did try it and it didn't help. I suggested to them a firmware update which would allow the user to turn off the DIRECT-II-VIZIOTV AdHoc network for those who have problems or no need for it. As I said, so far we haven't moved passed the 'can you try another channel' phase.