Originally Posted by Lennyuk
Mine is working now, I did two things so please try them in order (1 first, then if that doesn't work try 2)
1) Clear Cache and Data on the chromecast app, uninstall it, reboot then reinstall from the play store.
See if cast is working
If not try step 2
2) Switch to Dalvik
One (or both) of these two things managed to get screen mirroring working for me.
I first tried step 1 but no luck. Step 2, switching back to Dalvik did the trick.
And as ART currently makes no real perceptible improvement IMO and experience I'm happy to stick to Dalvik until a bit further down the line.
Sent from my LG-D855 using XDA Free mobile app