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Android Studio logcat showing nothing

Hi at all! We all know that Android Studio has always been nowhere close to Xcode for App development, there are hundred of bugs in every stable version I try to download.
Anyway, a problem I have since Android Studio 2, is that logcat shows nothing, unless I restart the emulator continuosly until it shows. If I try to do "File > Invalidate cache / restart", it shows as it should, but I cannot do this always!!! It's frustrating!!!!! It also clears my custom filters!!
You know that you can switch devices in the logcat options. I remember in Android Studio 2, when you started more than one emulator, or shutted down the old one, it was still visible in the list, but maybe it was marked s "Dead".
I don't know what the "onchange" does on that listbox, but switching devices, even if the other was marked as "Dead", then switching back to the actual device you are logging, logcat popped up with actual logs!
THIS IS CLEARLY A BUG, THAT WAS NEVER BEEN FIXED!!!
In Android Studio 3, Dead devices are removed from the list, so there are no more than one device available!!!
Don't say "try with real device". I cannot always try with real devices, because I don't own every single device with every single screen densities!!!!!!
But anyway, every IDE has logs, but they should work, don't they?
SO, IS THIS A BUG OR AM I MISSING SOMETHING?

Thanks in advance!

Please, don't pop up with stupid solutions you already know that will never work. Thanks
 
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Have you tried Logcat restart? Bottom left of this screenshot.

logcat_restart.png
 
To be fair though, that's not a particularly stupid question, I've seen worse. What's asked here generally reflects the type of questions asked on StackOverflow, and the really unanswerable stuff either gets ruthlessly downvoted, or just ignored.
 
Doesn't seem like a stupid question to me, but then I'm NOT a developer. :)

Maybe I should compile a list of stupid questions, and stick it in the README_FIRST? Pretty pointless though as nobody reads that :rolleyes::D
 
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