I have a fresh install of Ubuntu 14.10 on my laptop Compaq 420, just a while ago. At login screen, it suddenly becomes black for a split second and then shows it again. Or sometimes, it appears after you typed your username and password then shows the desktop. It also appears when you logout, this time a couple of times before showing the login screen. Is this something to do with the login manager ? I find this annoying so any help would be really appreciated.
Memory: 3.8 GiB Processor: Intel® Core™2 Duo CPU T6670 @ 2.20GHz × 2 Graphics: Mobile Intel® GM45 Express Chipset OS type: 64-bit