Successful Mint Cinnamon install/suddenly blank screen

[pressmanbill]

I have been running 14.1 Cinn for maybe two weeks, and suddenly it won't boot, only go to blank screen. I can get to grub menu and followed the directions in http://forums.linuxmint.com/viewtopic.php?f=46&t=122257

However, after editing and pressing F10, the machine booted to a blank screen,
Pressing Ctl + Alt + F1 gets me a simple login screen (tty). Login is successful.

Trying:
sudo service mdm start
results in "Not starting MDM Display Manager; it is not the default display manager"
So what is my default DM, if not MDM??

Admittedly, I do not know what I am doing here, just following recipes......

I have a home built machine using Geforce GTX 550 TI, so that's nvidia.
I repeat: the machine ran great for two weeks: maybe something happen after the last running of Update Manager (???).

[jungle_boy]

... maybe something happen after the last running of Update Manager (???).

Proceed to a fresh install (first of all, don't forget to backup your files) and when update, don't update level3.

The LM development team believe that level 3 update works, them not sure; better not do update level 3, only level 1 and level 2.

[pressmanbill]

Hello jungle_boy
It seems to be due to a conflict between lightdm and MDM -- why both got installed on a fresh installation of Mint 14.1, I don't know. Please see
http://ubuntuforums.org/showthread.php?t=1743535
for a solution to the problem (the last dozen posts).

I didn't realize that Update Manager would install dodgy updates?? Sounds like Msoft service packs.

[jungle_boy]

LM documentation said:

"Level3. Safe packages. Not tested, but believed to be safe."

Level 3updates “should be safe” but, although we recommend you take them, make sure you
look over them on the list of updates. If you experience a problem with a particular Level
3 update, tell the Linux Mint development team so they can take measures to make that
update a Level 4 or a Level 5 so as to warn or even discourage others against applying it.


http://www.linuxmint.com/documentation.php