Cannot update mesa

Question

As I said in the object, I can't update mesa. I'm using kde x86_64.
To update the system I modified pacman.conf to ignore the update of mesa, then downloaded it from my mirror and installed manually with pacman -U. At the end, a good pacman -Syu worked well.
before applying this solution I tried nearly fifteen extra repo without luck. 
Now everitime I try to update I have this error:
:: Download packages from extra...
errore: impossibile scaricare il pacchetto 'mesa-7.7.1-0.1-x86_64.pkg.tar.xz' da mi.mirror.garr.it : File unavailable (e.g., file not found, no access)
errore: impossibile scaricare il pacchetto 'mesa-7.7.1-0.1-x86_64.pkg.tar.xz' da mi.mirror.garr.it : File unavailable (e.g., file not found, no access)
attenzione: impossibile scaricare alcuni file da extra
errore: impossibile eseguire l'operazione richiesta (File unavailable (e.g., file not found, no access))
Si sono verificati degli errori, nessun pacchetto è stato aggiornato.

Answer 1

frankifol, stai usando i mirror italiani, aggiungi anche quello tedesto e francese (due a caso, i due piu vicini) e vedrai che si sistema tutto.
questo lo fai editendo /etc/pacman.d/mirrorlist e decommentando uno o piu mirror.
sorry for italian language, but he's having my same problem with italian repos, so i tought i could help him here with our own language. i told him to change mirrors and edit mirrorlist decommenting 2 urls (germany and france)