An older thread but just adding some further information for others that may still be experiencing this issue (or for those who may come across it in the future) still seeking a fix.
Obviously, you can still use the established method above but the unfortunate downside is you do then lose
all voice control options from your A3. (If you previously tried this & disabled your A3's mic?..... Try reenabling it again now, it's possible that Google updates in the interim may have simply resolved it.) In the past I didn't use the voice control much from the A3 myself, but I have found it increasingly useful in a couple of apps with the U9-H more recently
. The problem above aside, it works well.
Can't be bothered to read the rest lol!! Ultimately, if you haven't installed any apps that include voice control that could be malfunctioning & hijacking the A3's mic in some way, or you just can't resolve it.
Your options are either factory reset/re-flash your U9-H if you'd like voice control back, or just stick with your A3's mic disabled if you're not bothered about any voice control at all. The odds are extremely good your A3 will behave normally & as expected after a factory reset which makes it worthwhile if you'd like voice control back again
.
Otherwise, from hours of testing across multiple U9-Hs combined with several A3s, repeatedly reflashing these devices between the stock MINIX firmware ROMs & the CE beta ROMs since the previous posts.....
..... It's been incredibly difficult to get this problem to present itself again. However, I have still seen it on both the stock & CE ROMs but in most cases a Google app/system updated again & cleared it. I certainly can't get it to reproduce with any reliability at all & it is very much random.
The
only way I have got this issue to repeat a couple of times is by re-flashing with the stock MINIX FW006/FW007 & allowing the device to update OTA to FW008. Voila, it's been present but it usually clears following Google updates as well. A subsequent factory reset has cleared it when it did get stuck.
(Why would I bother re-flashing with the older FW006/007 & OTA updating you ask lol
? FW006/007 both have the option for the "
backdrop" as a daydream/screensaver that isn't present if you flash directly with FW008, or the CE ROM's. It's a feature I've always used with my main stock U9-H (or on my old Chromecast). (It's a Google daydream/screensaver that's more or less identical to the backdrop on an actual Chromecast device. They display a rotation of some absolutely incredible photo collections if you're wondering lol
.))
Hope it may be of some use in the future
.