Glad that helped.
I had an issue where Play store wanted to reapply every app I had previously installed. Plus all settings. Hard reset without adding your Google Acct, prevents it. Then adding the acct manually through Acct's and Sync seems to prevent it.
Yeah, I had a lot of settings out there in the 'cloud' and after doing a factory reset, followed by *not* restoring my old data, WiFi is now behaving normally on my Evo LTE.
It looks like there was some setting that was being restored that was in some way not compatible with Jellybean, but yet couldn't be changed... maybe something that could be read but not rewritten somehow, or set to some value that isn't valid or otherwise corrupted in some way.
It took a few hours to get everything reinstalled and reconfigured, but now it looks OK. I'll update the other thread with the solution in case someone else experiences the same problem and searches for the solution.
It's possible it's your previous settings as Google does store them. If your like me, I have about 10 differnet WiFi systems I connect to during the week, e.g. work, home, parents house, brothers house, etc.. These known locations are stored and backed up and when you do a Hard Reset and connect to your Google acct they come back.
I can't remember though where this info is stored to remove it.
Making some progress... if I do a Factory Reset and do NOT restore my data from my Google account, WiFi seems to be working normally. So some stored setting in my Google account may be corrupt or broken in some way, or there's an off-chance it could be some app I had installed interfering with normal power behavior.
I suppose this means I'll have to re-install all my applications manually, since Google doesn't give you the ability to pick and choose which settings or which applications or which data you want restored... it's all or nothing.
It does explain why a factory reset didn't seem to help though... it would have helped for a few minutes, until the automatic restore put the phone back into the same bad state it was in to begin with.
Of all the things I can recommend I like this one the least. Worst part is I cannot even give you a guarantee this will resolve the issue. Based on your post you have already done everything else I can think of at this point. I certainly understand the problems that come with the reset of the device.
You have got to be kidding. Like I have nothing better to do than to re-download and re-configure every app on my phone.
At this point I would recommend either a factory reset of the device as something in the software is causing this problem. Given the other problems I have seen thus far yours is the only one where the device connects normally then discounts with the screen time out. If others are having this particular problem I would it would help if we could get some information of how many. If there have been other posts with this issue I may have missed them
I had to turn off auto channel detection on my DLINK D615 router and specify a channel in order for my router to work. It works fine now and seems to be stable. My EVO worked just fine on the WiFi at my place of employment and has all along recognized my neighbors WiFi, just not mine until I performed this fix. Don't know if you're going to address it though so I can go back to auto channel detection.
Yep. I've disabled automatic connections, disabled the power saver (which re-enables itself after a reboot, which is a separate issue), set "Keep wi-fi on" to "always" and tried different settings for the band and "maximum performance" setting. It doesn't matter which combination of settings I choose. It happens Every. Single. Time.
The easiest way to observe the symptom is to unlock the phone and watch the status bar as the wifi icon disappears, 3G turns on, then the wifi icon reappears, and 3G turns back off. It's enough of a disruption to screw up everything that's running.
WiFi Fixer's log just shows this:
Build:0.9.5.4a:979 at Dec 15 10:40:11 PST 2012
CatLog shows the wifi disconnecting in response to a power event. It's basically just ignoring the "keep wi-fi on" setting entirely.