linux system cursor comes with a frozen frame , pic inside .

[social_loser]

hello guys , my os is ubuntu 12.04 LTS ,I 've played 1.2.1 before , no such problem then .

a lot of things changed since then , I installed and removed many packages ,but didn't change hardware or os , now I don't know what course this cursor problem .

just like in the pic , anyone can help me pls ?