Hello! I have some problem with mi BV P10000 pro after last update. The back virtual buton work after i press'it 2,3 times,the homme button don't work , and the display don't close after the 30 seconds and rest active ,draining the batery. I need a solution!!! Thank you!

Please perform a factory reset booting the phone on recover mode: viewtopic.php?f=192&t=334922

Performing a factory reset after each update is highly recommended.

If i make a factory reset booting the device in recovery mode i lose everithing from my phone?

I reeded the post and i tried the reboot in recovery mode ,but do not work for mi,that menu. The phone rest in no comand screen and not hapend nothing. Any solutions?

I observed that the timmer for the display (30seconds) work's only when the phone is recarging .

Cypryan wrote:

If i make a factory reset booting the device in recovery mode i lose everithing from my phone?

Factory reset = total wipe. So yes, you'll have to backup your stuff before doing that!

Cypryan wrote:

I reeded the post and i tried the reboot in recovery mode ,but do not work for mi,that menu. The phone  rest in no comand screen and not hapend nothing. Any solutions?

Please follow carefully what has been stated in such link. 
Pay more attention to this: in the "no command" screen, press and HOLD Power button, then, without releasing such button, press ONLY ONCE the Volume+ button. Now release the Power button. 

I have done the factory resset ,like in the description , but the problems is the same. The timmer for the display don't work . if i put something in the USB port ,like the otg cable ,or if the phone is on charging the timer works just fine. Probably the charging board is damaged because sometimes when ai put the cable in the USB port the phone is not charging.

For the display timer issue, did you try to edit the shutdown timer under settings -> display?

Yes! The timmer works only when is something in the usb port,otherwise the timmer is not working.