Seen many questions on this matter, but as I can not access CTRL-ALT-F1/2 I'm stuck into this loop.  It keeps asking for password, clean orpheants and back to login.  As I can NOT open any manager/control window it's somekind of strange behavior.  I can NOT login as myself OR as guest. :-(
1378
My Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back.   I've read that the problem might be caused by an error depending on the graphics, here's my graphics card: ATI Radeon 7670M
26645
I know a  exists. However I was wondering was there a better way in logging into a Windows 7 computer as computer_name\administrator with a standard admin password?  For what purpose?  Fast login as technical support who has to do several logins a day.  What Operating system?  Windows 7  For what type of log-in (local or remote) With what level of security is still expected?  Local login  Whos computer (yours or everyone elses)? Everyone at the company
9128
After booting to the GUI in 12.04, I attempt to move to the virtual terminal (or shell, or tty) via Ctrl-Alt-F1 (F1 through F6), and the screen remains blank. I have tried all 6 tty instances and the results are the same. Ctrl-alt-F7 brings me back to the GUI without a problem. Any thoughts?
100413
Actually my touchpad was not working, so I installed and uninstalled some packages and I did not know what they were. Now I am now getting a login screen and after typing password, it is coming back to the login screen again and again. Help me to solve this problem.
76190
What happened  I was working on my laptop while it upgraded from 15.10 to 16.04 (which I admit was a mistake) when suddenly the Unity overlay disappeared and the only thing on screen was the Firefox browser window. I switched to a new terminal, logged in and tried to run sudo service lightdm restart but instead of restarting correctly, the screen started turning on and off repeatedly, which freaked me out, so I physically turned off the PC.  Long story short: I forced a shutdown halfway through the Ubuntu upgrade.  Ever since, any attempts of logging in normally have been met with a solid black screen and the idle whirring of the CPU fan.  What I have tried  I have tried the recovery mode boot up, but no luck (The log does greet "Welcome to Ubuntu 16.04 LTS!"). I tried out each option that seemed useful:   dpkg goes through the packages as advertised, but strangely enough it always locks up on some Braille package until I do Ctrl+C, at which moment it spouts some error messages and then I think throws me into the normal boot. failsafeX results in a similar situation to the normal boot: a black void. fsck says the single partition I have is a-ok. grub seems to get a bunch of stuff. Don't know if it searches locally or fetches from the internet. network didn't work I think.   I tried following  but couldn't do the sudo part because the filesystem was mounted as readonly. So I ran fsck which mounts as RW and tried again.   This time, after running apt-get autoremove it went through many packages (Setting up foobar (X.Y.ZubuntuN) ...), sometimes installing packages, which I assume is the usual behavior. One thing to note though is it kept getting stuck several times, so I had to Ctrl+C it out of processing the current package. It finally ended on "Processing was halted because there were too many errors.".  While  seems to mention some of the graphics problems I've been experiencing... I have Intel HD Graphics, not Nvidia. I'll keep looking into it.
100843
In Ubuntu 11.04, Ctrl-Alt-Del gives me a menu with shutdown, hibernate, suspend and restart, but no logout. Is there a key combination to logout of Ubuntu? Is there a way to provide one?
88002
I am horribly impatient and can't stand the (for me subjectively long) delay of around 2 seconds after entering an incorrect password in the login screen or also as sudo password, before I can retry typing it correctly.  Is there a way to modify the delay and reduce it to around half a second or turn it completely off, both for sudo and the login screen?   The optimal solution would include a longer delay after maybe 3 or 5 incorrect passwords, to still prevent brute-forcing.  PS: I am currently using vanilla Ubuntu 16.04 with Unity Desktop and lightdm.
105633
I am stuck in a login loop because of this error.  I've seen a few threads about this matter but none helped.  I do Ctrl+Alt+f2, when I log in it shows me two errors:  -bash: /home/imight/.profile: line 19 unexpected EOF while looking for matching -bash: /home/imight/.profile: line 22: syntax error: unexpected end of file
40232
In win7, when I want to restart computer via keyboard until my operating system hasn't been loaded yet, I press Ctrl+Alt+Del.  What is equivalent to this command in Ubuntu?  (Note that I'm not asking for Task manager).  I wish to restart it if, for example, I pressed F10 but BIOS didn't load successfully so I have to reboot it. I really don't like brute way (using physical shutdown button).
377
I need to reset my password. I have followed these steps:    However, then I go to "root" or "netroot" recovery options, it tells me:  Give root password for maintenance (or type Control-D to continue)   Clearly, I do not know the root password. If I type CTRL+D, I return to the list of options. From  I read:  Under chapter 'The Other Way':  4. Highlight the line that begins kernel and press 'e' to edit`   But in the grub configuration file I have no line that starts with kernel. Only:  setparams 'Ubuntu...' recordfail set gxfpayload... insmod part_msdos insmod ext2 set root=... search --no-floppy... linux /boot/vmlinuz-2.6.38... initrd /boot/initrd.img-2.6....   Those are all lines in my GRUB. Which line should I edit? Or is there another way to reset my password?
44987
Something came up today that bugged me a bit, I left my laptop on battery power before going to bed. When starting it up the battery was dead. I plugged it in, and here is what happened:  The startup progress bar came up for a while and then a forgot password prompt came up, with questions like: "set a new password" + 2 other options that I can't remember (they weren't relevant) and a previous and next arrows.  Puzzled, I hit previous and the dialog froze. I proceeded to restart again and ended up on the same dialog, I reset my password to the same as my previous and that was it.  Any idea what might have happened?
61697
It never gave me the option to make a password, and now I can't even sign in. I've tried to click the link, but then it takes me to some website that doesn't help me at all!  How do I recover my password?
57672
My Ubuntu 14.04 is stuck when trying to login my desktop. The screen goes black and soon after that the login screen comes back.   I followed all steps in  but the issue was not solved.
88026
Recently upgraded to Ubuntu 18.10, having two problems.  Easiest to explain: when I open "settings", go to "privacy", select "screen lock", I get the popup window with the screen lock settings, but everything is grayed out:   Second issue: If I step away from the machine for long enough (seems to be 5 minutes), the screen blanks. Hitting a key or moving the mouse wakes it up. But when it wakes up, the only things on the screen are the icon bar at the left and the top bar with status icons on the right end. The rest of the screen is blue, not my normal lock screen image. The screen isn't locked, it doesn't prompt for a password, it's just...blue.  I can move the mouse pointer around the screen, the icons react if I click on one, I can bring up the popup with volume/brightness controls on the top bar. But if the pointer is on the blue background, neither left nor right button clicks do anything.  Now, if I press ctrl-alt-F1 from there, I get a lock screen where I can enter my password. Then I get the blue screen back, but if I press ctrl-alt-F2 I get my normal screen (with running applications) back.  ctrl-alt-F2 without going through the lock screen first does nothing.  I'm not finding anything while searching that matches either of these sets of symptoms. Suggestions?
40373
The problem can be reproduced as follows:   When I remove the password of an administrator account, "Log In without Password", I cannot use that account to authenticate. When I do something that requires authentication, I cannot use an admin without a password to authenticate. If I leave the password box blank without a password while choosing a non-password admin, authentication fails (in terminal or in GUI).   How to fix this problem?
86718
I'd like to switch my Ctrl and Alt keys under Linux (to make it more Mac-like).  How do I do this?  If it helps, I'm running Ubuntu 9.04.
96729
I just jumped into a command line virtual console using Ctrl-Alt-F1, and i would now like to return to the gui. startx gives me something along the lines of 'this server is already active for display 0' if ...etc. it gives me a command to remove /tmp/.X0lock if that isn't the case...I could just restart the machine, but i'm worried i might mess something up.