Ubuntu boot problem read details?

Question

(before answering may i please add that if you dont have something useful to say dont say anything, so dont say "this sounds like a nerd rant" all u do is take it off of the recents and lower my chances of recieving a helpfull answer"
ok, so ive been running ubuntu for a while now and have run across no problems.
however i have now run into a big one.
i was disableing the guest account (cause i was mad at my brother for snatching my computor then hitting me so i banned him from it for a while cause almost droped and broke)
so i followed the intructions to disable it at
http://www.techlw.com/2012/05/disable-guest-account-in-ubuntu-1204.html
then as im restarting (my bro was tring to mess with the process in hopes of it not happening) he pressed the down key and booted in recovery mode. well i then continued to boot it normally buuuut when i did i got the (now must boot in low graphics mode) nblack screen. i also had no cursor after this so i could not press OK. so i had to long press the power button and shut down my computor i then normal booted but got the low grapgics thing again but now i have a cursor. so, i go to boot and then reboot like it says to do after the system rocovery mode but when i press ok to go into low grahics mode it goes to the boot screen (the one that says ubuntu with the dots under it) and stays there so eventually i have to shut down my computor again. if anyone can help plz do i really want my GUI back im only here now because i uesed ctrl +alt+f1 then loged in then startx (witch brought me to my desktop backround with no dock options or anything but the pic) where i prceeded to use ctrl+alt+t to open terminal and then browser from there sooooo. i now have acess to a startx terminal. remember everything was working fine before this (no i do not want to clean install i would lose all my programs and documents) p.s ignore all bad grammer and spelling mistakes its late and this is typed quickly

Answer 1

When you get to the terminal, try



apt-get purge lightdm

apt-get install lightdm



I have a theory that you borked the lightdm config file. (hence why it isn't starting up) If you try to start lightdm rather than startx you may get a helpful error message as well.



You can appedn --noquiet and --nosplash to the kernel option in grub when you boot, so you have a better idea where the boot process is hanging.

Answer 2

HI THIS IS MASTERMYSTC, the same person who asked the question i have resolved the problem myself and am posting the the answer as well as some advice for anyone who's curious and so people don't have to try to come up with one (or give wrong ones) so i am am posting my own answer

Thanks for reading my post but i have fixed the problem. As it turns out the problem didn't lie in the system recovery or low graphics or spontaneous shutdown as i had expected. i went up in my terminal log and found the commands for when i disabled the guest account (beginning of my post) and suspecting that this could be possibly be the reason for the boot problem (also why i included it in my post) i deleted the changes i made and everything now works fine.I suspect it was because i was in a hurry and my brother was trying to stop me so i ended up adding the new line of code in the wrong place, (probably cause i didn't read the instructions carefully, in a hurry and all) anyway i ended up adding it at the top of the page/codeing before anything else. this is what screwed my computer up as deleting the line of code i added fixed everything. My computer is now fixed and working in pristine condition, its now running great again, same as before all of this happened. thank you for your consideration and what we can all learn from this. don't add lines of code in the wrong place or order, don't add them in a hurry and follow instructions exactly. (unless the instruction were just wrong 0_0) otherwise you can end up with a BIG problem that takes hours to fix. otherwise you could end up with a problem that LOOKS like another problem and SEEMS LIKE it is being caused by something else (low graphics mode) but in reality is all being causes by that little eency thing you did, that tiny little insignificant change or code in the wrong order or something that seems almost unimportant or insignificant that caused so many problems all the while it SEEMS these problems were caused by this big thing that LOOKS LIKES its a much more probable cause. then, you spend time on what SEEMS to be the cause all the while forgetting all about that small thing you did. not to mention the problem itself could be huge, i mean i spent 2 hours and much research just trying to start my computer and get to the point where i could access a terminal or fix the problem. if i hadn't been able to do these well, my computer wouldn't even start i would be out of luck and half to go to windows. i figured out ctrl alt f1 but there wasn't much i could to from there i then had a half hours worth of problems with the start x command and until i was able to access the terminal i could'nt get online with anything but my phone. anyway i digress thanks for reading.

Answer 3

If its an ATI Radeon card, which i'm guessing it somewhat is then there is not any might desire to place in extra drivers, as each thing will run in simple terms high quality on the many times used ones, even Compiz Fusion. sturdy success. LUg.

Answer 4

HI this is mastermystc again (person who posted the question) i just came to reply to ratter_og_the_shire

so, @ ratter_of_the_shire

Hey, you were right, i solved my problem before reading this (as my self answer says) but you were right. i did mess up my lightdm file. i solved my problem in a much different way then you advised (by opening it and deleting the changes i made)

basically i was suposed to do this

"[SeatDefaults]

user-session=ubuntu

greeter-session=unity-greeter

allow-guest=false"

but did this in a hurry

"allow-guest=false

[SeatDefaults]

user-session=ubuntu

greeter-session=unity-greeter"

Answer 5

that's typical for ubuntu smooth running until you install something or do something out of the ordinary then BIG PROBLEM, you really need a linux enthusiasts site as only they understand the structure of how to do something it is still really a system for experts