After starting the system, i've a black screen (without any screen backlight), then i have to switch to tty6 (ctrl+alt+f6), login and restart the lightdm:
sudo service lightdm restart
I'm using xfce.
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1st Way to solve your issue:
Try to reconfigure lightdm (if it doesn't solve your issue then go for Alternate way mentioned below.)
Open terminal(CTRL+ALT+T) and execute following command:
sudo dpkg-reconfigre lightdm
lightdm from the list. As shown below:
Restart your system:
sudo reboot now
It should fix your issue.
an alternate way, which would solve your issue. Give it a try.
Installing a new display manager can fix your problem. Steps to install GDM(a display manager much like lightdm):
Open terminal(CTRL+ALT+T) and execute following commands:
sudo apt-get install gdm sudo dpkg-reconfigure lightdm
gdm from the list:
If it's still not fixed, try removing
lightdm after installing
sudo apt-get remove --purge lightdm sudo reboot
Reply if something goes wrong..
If you are booting windows with ubuntu i have same problem then i tried everything referred from sites.finally nothing is worked for me.
so one thing is worked for me.
this will boot your ubuntu os normally. and it works for me also it saves your time to everytime restart lightdm service.