Hi!
> After upgrade from 2.12 to 3.0 Tails version....mouse touchpad is not working, usb mouse too(32 bit computer)..and system is booting more slower than before.
>
> When I see Tails welcome sreen..computer is not response.
> Upgrading was automatic via internet in usb live.
>
> Please fix this bug?
> I have to make reinstall...and it is problem.
>
> If yo have additional question, please write.
I'm not sure to understand you, there is no automatic upgrade from Tails
2.12 to Tails 3.0 for now, because Tails 3.0 is still in beta.
Which Tails 3.0 beta did you try?