Not an unity/compiz issue I will tell. I have the same thing if I try, like you setting a high resolution on my external monitor (1600 x 900), no issue if both are using 1024x768. Either related to hardware performance or driver then. Reassigning to mesa
** Changed in: unity Status: Confirmed => Invalid ** Changed in: unity (Ubuntu) Status: Confirmed => Invalid ** Package changed: compiz (Ubuntu) => mesa (Ubuntu) ** Changed in: mesa (Ubuntu) Status: Confirmed => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/769650 Title: dual monitor runs unusably slow (Asus 1000HE, Intel 945GME) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs