Screen becomes black on exiting topic

After payback, while returning back to the list of files, the screen becomes black for a second or more. That's rather annoying! At first I thought, that problem is in lollipop, but other players i've tested are ok.
Found our, that problem is only, when auto brightness is on.
Please, fix!

Nexus 7 2012/ 5.0.2

[Q] Exiting recovery mode on Galaxy s5 topic

I am using an at&t galaxy s5, and have booted it into recovery mode, in an attempt to reset it to factory. However, I accidentally pressed 'update from ADB', and now I cannot exit recovery. Please help.