Stuck on command line

[CrisisCore]

Guys, my first post here, just got the Pi a couple of days ago. It's been ages since I mess around with Linux, so I'm a total noob right now .
I know this is ridiculous, but I got stuck on the boot screen. This has happened before, but I just rewrite the image of retropie on the SD card again to temporarily get rid of the problem.
Here is the screen:
Booting up the Pi gets me to this :/ I just don't want to keep rewriting all my files to the SD every time this happens.
Thanks.

[herb_fargus]

@CrisisCore in order for us to help you please fill out the required information:

https://retropie.org.uk/forum/topic/3/read-this-first

My bet is you're choosing the wrong SD image.

[CrisisCore]

Pi Model or other hardware: Pi 3 Model B
Power Supply used: The recommended 2.5A@5V
RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest): 4.1
Built From: Retropie WebSite
USB Devices connected: Keyboard
Controller used: Just the Keyboard
Error messages received: I get stuck on the boot screen
Log found in /dev/shm/runcommand.log (if relevant): don't know how to get this file
Guide used: (Mention if you followed a guide)
File: (File with issue - with FULL path)
Emulator: (Name of emulator - if applicable)
Attachment of config files: (PLEASE USE PASTEBIN.COM FOR LARGE LOGS)
How to replicate the problem: I don't know. It happns when I boot the device

When i boot, I get this screen:
https://s24.postimg.org/itv1cpd0l/WP_20170227_22_22_13_Pro.jpg

I can type exit on that, and get to this screen:
https://s24.postimg.org/tfewopjc5/WP_20170227_22_21_44_Pro.jpg

Then i type emulationstation, that gets me to the screen i was before...

[tygr20]

@CrisisCore I just had this problem the other day. For some reason on exiting EmulationStation it's eating the lightdm GUI. Try this from the command line you're getting:

sudo apt-get install lightdm

This will reinstall the GUI. Once it completes, type emulationstation at the prompt.

[herb_fargus]

Lightdm shouldn't have anything to do with it. Rather it's possible the download was corrupted or the extraction was, or the SD card is dodgy.

Did you verify the md5sum?

[tygr20]

@herb_fargus only speaking from my own experience earlier this week. I agree, it shouldn't, but as soon as I installed lightdm mine took off without a hitch.

[herb_fargus]

@tygr20 well if it works it works ;) would be nice to understand why though if that really is the issue

[CrisisCore]

@tygr20 Just tried that, didn't work :/

[tygr20]

@herb_fargus as a noob I'm guessing it worked for me because I was missing some file that came onboard with lightdm. I agree, is love to know why it worked. For now, just keeping my eyes crossed. 😁