I'm a newbie to Linux and Ubuntu but I installed it as the second OS (after Win7) on my Sony Vaio netbook. Everything's working fine except for Ubuntu doesn't restart properly. Shutting down is working well but when doing a restart it looks like it is restarting but then it shows a black screen and fails to re-boot. What I have to do is force its shutdown by holding the power button. I remember having experienced a similar problem with an earlier Ubuntu version running on completely different hardware, too.
Please, help me resolve it. Regards Ralf