Take the tour ×  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  share|improve this question Are you
dual-booting, with Windows? Was Windows previously installed on
the netbook? –  david6 May 4 '12 at 9:16 Yes, I'm dual-booting
with Windows 7. Yes, Windows was installed as the first OS on
that Sony Vaio. On a Lenovo notebook there is also a problem but
with shutting down (seems to have shut down but the fans are
still working) but restarting is working fine. It's a dual boot
as well. –  ralf May 4 '12 at 13:30