I sampled a few call stacks of the slowdown using gdb. It looks like the system is spending a lot of time in the NVIDIA driver, called from libpixman-1-0's fetch_and_convert_pixel. I've attached a representative stack trace from GDB, with pixman debug symbols.
** Attachment added: "lp1069864-backtrace.txt" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1069864/+attachment/3421837/+files/lp1069864-backtrace.txt ** Also affects: nvidia-graphics-drivers (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/1069864 Title: UI freeze for up to 10sec when maximizing window To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/1069864/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
