I changed compiz-config and now i can see only white screen.

[palewar]

I must reset conpiz config.But i dont know  how to do.

Solved.:I deleted .config/compiz folder .

[menotu]

Great!

For future reference a couple of ways to change window managers is by going to

Configure Your Desktop >> Personal  >> Default Applications >> Window Manager > and switching to KWin or Compiz.

Another method is by having the Fusion Icon installed and right clicking the icon in the panel and choosing Select Window Managers

HTH.

Oh, can you go to your first post and add (Solved) to the subject line.