screen stays black because of dead light display manager
by toddly from LinuxQuestions.org on (#4RS1K)
This is actually my second thread attempting to resolve this issue; the previous thread got side-tracked a bit after a month and some 40 posts, and my total newbieness probably scared away several folks who initially tried to help.
I don't know any of the Linux jargon, like mount for instance.
In any case, my screen went dark after installing a month's worth of updates. When I turn the computer off, I can see a screen of stuff loading that lasts for a split second before the computer turns off. One of those lines says that my LDM is dead.
I have poked around on the internet in search of possible solutions. But I have reservations and questions about all of them. Are they safe? Will they work? I don't want to lose my data.
Here's a few suggestions I have found:
1. Ctrl + Alt + F1, then sudo service lightdm restart
2. Remove and reinstall the light display manager
Try to go to tty1 (what's that?)
sudo apt-get purge lightdm
Autoremove whatever is left with
sudo apt-get autoremove
Reinstall lightdm with
sudo apt-get install lightdm
3. Another page recommended the above while also saying that I should purge and reinstall xorg. I've heard this will remove my desktop. Will it be restored? Completely? Is removing xorg necessary?
4. One page recommended: sudo dpkg --configure -a
5. Lastly, some people recommend: systemctl start lightdm.service and
systemctl enable lightdm.service
Okay, so which of these, if any, should I try? My desktop type is cinnamon, in case that makes any difference. Presently I am booting Linux from a thumb drive and that is how I finally, after a month, was able to get back online.
Thank you for your help!!!


I don't know any of the Linux jargon, like mount for instance.
In any case, my screen went dark after installing a month's worth of updates. When I turn the computer off, I can see a screen of stuff loading that lasts for a split second before the computer turns off. One of those lines says that my LDM is dead.
I have poked around on the internet in search of possible solutions. But I have reservations and questions about all of them. Are they safe? Will they work? I don't want to lose my data.
Here's a few suggestions I have found:
1. Ctrl + Alt + F1, then sudo service lightdm restart
2. Remove and reinstall the light display manager
Try to go to tty1 (what's that?)
sudo apt-get purge lightdm
Autoremove whatever is left with
sudo apt-get autoremove
Reinstall lightdm with
sudo apt-get install lightdm
3. Another page recommended the above while also saying that I should purge and reinstall xorg. I've heard this will remove my desktop. Will it be restored? Completely? Is removing xorg necessary?
4. One page recommended: sudo dpkg --configure -a
5. Lastly, some people recommend: systemctl start lightdm.service and
systemctl enable lightdm.service
Okay, so which of these, if any, should I try? My desktop type is cinnamon, in case that makes any difference. Presently I am booting Linux from a thumb drive and that is how I finally, after a month, was able to get back online.
Thank you for your help!!!