@ber4444 the frustrating bug you mentioned is fixed with a patch you have to apply yourself. it happens with hybrid graphics and the proprietary nvidia driver.
workaround is to use a usb mouse instead of the touchpad. Nikhil Mahale (nmahale) created a working patch: https://bugs.launchpad.net/xorg-server/+bug/1220426/comments/171 So i have the same problem, i can't uninstall the proprietary nvidia driver from GUI, so i had to follow guides like this: http://askubuntu.com/questions/206283/how-can-i-uninstall-a-nvidia-driver-completely -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1401591 Title: package nvidia-331 331.113-0ubuntu0.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1401591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs