Ubuntu :: Unable To Authenticate Password On Login Screen
Jan 17, 2011
I may be a beginner to Ubuntu 10.10, but I'm fairly certain that this is weird: I have had no trouble logging into my Ubuntu 10.10 netbook until this morning. Now I am unable to get past the login screen. It says that there is an Authentication Failure, which is bogus. Not only should the password work, but it does in the Terminal. I am able to login to the terminal and gain root access.
I can even change my unix password, but no matter what I try I can't get to my desktop. I did run into a major issue with a frozen program. Rather than reboot, I tried to close it using the kill command. What ended up happening was that all that remained was my wallpaper, probably a bad move on my part, but I'm a rookie. I think I killed all running applications. This happened last night... so probably related.
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Mar 23, 2009
Previously I have a hard disk running OpenSUSE partitioned as follows:
Code:
/dev/sda1 = swap
/dev/sda2 = /
/dev/sda3 = /home
I redid the default partitioning scheme that Fedora tries to use (no LVM crap). Basically told it to make the above layout and to format swap and slash, but NOT to format /home because I want that data. I had it go ahead and install grub on the MBR of this HD as well. The install seems to have went ok and it rebooted. That is when the first problem comes up. I never see grub. I just get a black screen then a bar at the bottom that progressively turns blue, which I assume is Fedora loading.
This is all well and good, then it gets to the login screen (GDM) and I try to log in as root and it tells me "can't authenticate user" hangs for a bit, then goes back to the log in box. I try to get a virtual console (Ctrl+Alt+F#) and nothing. So I guess I have 3 problems in order of significance:
- Why no grub?
- Why no virtual console?
- Why root can't log in?
Normally I would edit kernel option line at the grub prompt to boot into single user mode and fix the problem, but can't. I was able to use the "rescue mode" on the Fedora DVD to accomplish this, but have not had a chance to figure things out any further. I don't think having a /home created by another OS would prevent root from logging in since root "home dir" is /root.
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Apr 15, 2011
I just bought this desktop from my friend and it runs win 7 and ubuntu 10.04. it worked very well the first two days until I changed the hostname of the system.
I did like: hostname myNewName
And everything worked fine. The problem now is when I start ubuntu and and reach username and password screen , I enter my password to login the screen becomes black and return me again to the screen where I put my password again. If I entered wrong password , the system message stating wrong password. On the other hand, when I try to run ubuntu from live-cd I can login easily and access my account.
My friend told me he removed Naultius package and reinstall it for some reason before he gave it to me. Note windows 7 is working properly.
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Jun 18, 2010
been using 11.2 with KDE on a Sony laptop since 11.2 was released always ran perfect suddenly I can't login, I get to the login screen type in password it begins to load my desktop, then fails and dumps me back to the login screen I can login as root, all my stuff is there (under /home/me) I tried changing my password, no luck I went to run level 3 and there I can login just fine seems to be something with my KDE profile
any ideas where I might find some error messages telling me what's going on?
this seemed to happen when I was running "blender" and making the machine do some heavy number crunching, it actually locked up.
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May 16, 2011
I've a problem with my ubuntu 10.04 suddenly when I opened my laptop and after I've entered my password then I redirected to a black screen and then to the same screen again and so on what I can do
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Oct 10, 2010
I recently powered up my netbook... Selected my user log in, entered my password, and after a couple seconds I briefly see what looks to be the console and am returned to the login splash screen... I can Ctrl+Alt+F2 to get to the console and log in... but that is as far as I can get. This is the case for Gnome, Remix, and Remix 2D.
I can sudo apt-get (update, upgrade, etc) as well. It is the right password because if I type in a wrong one it presents an authentication failure dialog box.
How can I fix my log in screen and get to my desktop? I am Currently running 10.04.... waiting to get 10.10
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Apr 10, 2011
Just installed Ubuntu 10.10 as a dual boot on a Windows Vista laptop. Usually when I've installed Ubuntu on other machines it's asked me to set a user name and password. In this instance, it's automatically taken the same user name as is used to login on Windows.When I try and log in on Ubuntu, it comes up with th user name from Windows, busks for a password. On Windows, there's no password set, so I don't know what to put.I've tried things like 'password' and 'Password' and the likes. I also tried going onWindows and adding a password there to see if Ubuntu would find it, but no such luck.
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Aug 22, 2010
I uninstalled the email portion of Ubuntu and rebooted the make sure that everything was good. Ubuntu came back to the login splash screen-I selected my login and entered my Correct password-Ubuntu splashed up screen writting (Unable to read as its to quick) and Ubuntu then returns to the login screen. Incidently when I enter an incorrect password Ubuntu tells me that it is incorrect but with my correct password it just returns to the login splash screen.
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Nov 9, 2010
Not sure how to do this on 9.10. After upgrading I noticed that the login screen is displying the users of the machine; however, I want to login screen to ask for username and password, without showing the users.
Is there a way to get the login screen to disable the saved users? Or a way to make the login screen ask for username and password?
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May 31, 2011
I'm having a bit of an issue. I was transferring some files from an external hard drive onto my desktop computer running ubuntu 10.04...It filled up the hard drive to the max, rebooted and I couldn't login. Did some googling and thought it might be because it was too full so I plugged the ubuntu HDD into my laptop, removed some files and tried again. Still no luck.
What it does is tries to automatically login (that's how I have it set) at the main login prompt, it for some reason is not able to and the screen flickers a bit and shows the login screen. I enter my username and password and it flickers really quick and goes back to the login screen. Does this for my other user account as well. I can login via the command prompt (ctl-alt-f7) and do stuff there, but I cannot login to the GUI.
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Jan 10, 2010
I tried to change my password through the Users and Groups dialogue, and now neither the old one nor the new one work. I tried to do it once, and it didn't do anything (the password was still my old password), then the second time I did it, when I went to save the configuration it wouldn't take my new password or my old one. Now I can't authenticate for anything.
A wicked backdoor I've noticed is that going into recovery mode offers you a root console without authentication. (Awesome, Linux, secure as all ****, seriously.) Is there any way to use this to set my user password without needing to authenticate?
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Mar 1, 2011
Today I've found out that I cannot authenticate and use my ubuntu 10.10 partition as it doesn't recognize my password! The password is correct, I also tried to change the username in "root" but nothing changes. When I write it, it shows for some istants a black screen with words in it (so quickly that it's not easy to read) and then it shows me again the form to access.
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May 2, 2010
I installed Xubuntu 10.04 on my Dell laptop earlier, and all went well until I tried to finally login. A dull black screen is presented (I don't know if that's normal; I expected a pleasant splash screen haha). As a windows user, I can only explain it as looking like a command prompt. The first line asks me for my login (which is my first name). I type it in, press enter, and then it asks me for my password. The problem is, no matter what I press, nothing happens after that.
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Oct 20, 2009
I newly installed Ububtu 8,04.3. I formatted my hard drive and erased Windows XP and tried to do the manual partitioning but don't have enough knowledge so picked the guided tour. Everything seemed to install but when I restarted it comes to "computer log-in" and wants a user name and password. I put in the user name I chose during installation and tried to put in the password but it wouldn'd type in - it also seemed to want a name for "computer." Does anyone know where I went wrong? I've been struggling to learn computer stuff on my own.
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Jan 27, 2010
i recently switched to ubuntu 9.10 from win vista, i am having a problem... in ubuntu when ever i do any changes it asks me for my password, i know that its for my own PC's securiety but now i am really annoyed with this.
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Jan 24, 2011
I have problem with login to Fedora 14. After I type my password is show Fedora 14 screen but It stop doing anything it show only Fedora 14 Picture background.
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Feb 18, 2010
The login screen does not accept the password for users. Only the password for Root. The problem is not in the command line, but check the password in the screen. I have tried to change the password from the root and it is still the problem. What I can do?
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Dec 25, 2010
I can't login after the password-protect-screen-saver comes on during a download.The screen is black, the cursor arrow moves with the mouse, but no login window.I have no idea what is wrong but it seems to correlate with this combination.
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Jun 11, 2010
When I boot Ubuntu 10.04 then at first the login screen appears with the main user
"Peter"
and
"other..."
In 99% of the cases I use "Peter" and have explicitely to click on Peter. Only then the password entry field appears and I can enter it.
This is somehow user unfriendly. Can I define somehow a default user (here: Peter) and show immediately the password entry field (and place the cursor inside)?
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Jul 9, 2011
Lots of password threads, but I didn't see this.
Installing Debian 6.0.2.1 amd64 on a Dell Optiplex 740.
The default install (simple graphical) works OK. But when I install "graphical expert", the same root password seems to be OK during the install, but doesn't work when the system comes up.
A. I have used a very short pw. It worked before.
B. The root pw is the same as the user pw. It worked before.
I am installing from CD and from DVD, both downloaded and burned as iso. In both cases, I asked for "graphical desktop" and "standard utilities", no servers, no laptop, no SQL.
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Aug 16, 2010
I was having trouble with pulse audio and completely obliterated pulse audio from my machine in order to prepare for a reinstall of pulse audio. this also uninstalled a few other packages that I needed to enter gnome or kde. when I try to login via gdm(?) my password will not authenticate (when I enter via xterm or tty the password is accepted). how can install packages off a live usb drive from Terminal. how to access a wifi network under terminal to use apt-get.
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Aug 3, 2011
I have a query regarding login to roundcube via dovecot ldap. I have installed and set up the openldap on Ubuntu Server 11.04 with the help of the following article [URL]. I have also installed Postfix, Dovecot, Dovecot-ldap and roundcube as the mail client. Then, I went on to test if I can login through roundcube. I received "login failed". I'm sure the dovecot is running fine as well as Postfix and openLDAP server. All I can find from the log was "auth(default) LDAP: Can't connect to server: localhost".
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Jan 21, 2010
We've just installed debian xfce lxde....after all this time to get it....when we boot up to the login screen it keeps saying wrong uder name or password
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Mar 3, 2010
I have just bought a PC with SUSE 10.1-0. The first time I started the PC an installation menu appeared. I didn't define a user name, thinking that it should log in automatically (as in Windows occurs), but now I can't go farther from the Welcome screen, due to the system is asking me de user and password, but I didn't introduce nothing! Leaving username and password in blank didn't solve the matter.
I can see the admin screen (pressing F10) but I am not able to find any user to log (logically) and I can't include new users from there.
I have also tried to install Windows XP modifying the BIOS but the system returns a message (once in the WinXP installation program) about an error called 4096, about the file i386halaacpi.dll, which is unable to find (something about the HAL), so I am afraid that my (new) RAM memory is damaged.
What could I do? The system is for an old person, so I would like to install finally WinXP and delete Suse.
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Jun 9, 2010
I have fedora linux as an operating system on my laptop but each time I try to install a new program it prompts for an authenticate root password of which I have no idea. I wanted to install windows xp on it but each time I do so it prompts"se-linux denial" on the base that the source is not trusted as i didnt authenticate it.
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Aug 13, 2010
I am wondering how websites like banks are able to determine if you have previously used a certain computer to access the website, even if your router's IP address may have changed and your system's cookies have been cleared. I have users that need to access our HTTP intranet from outside locations. Those locations will have dynamic IP addresses most of the time, so I can't just "allow from [ip]" in my Apache proxy configuration. Originally we considered a VPN, but determined that a VPN will be overkill to access just an internal website, since we do not want external users to have permission to the rest of the network, only the website.I currently have it working over HTTPS with basic authentication against an internal LDAP server, but I want a little more security for such an important website.
crappy diagram:
[user]-->(internet via https)-->[apache gateway]-->(intranet)-->[http server]
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Jul 17, 2011
I just downloaded Debian's live CD .iso file. I put it on a USB stick and booted from it. It loads everything then presents me a login screen. I have no idea what the login and password is I've looked all over google and people said it was user: live pass: live or something like that. I've tried a lot of different combinations with no luck. So does anyone know the real username and password for this?
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Feb 5, 2010
It happens like 50% of my Suse 11.2 startups, when I type in my password at login screen and hit enter, Gnome do not start, i can only see the green blank screen,or sometimes it start to show only my custom wallpaper and nothing more, when i try ctrl+alt+backspacex2 and login again everything seems to work fine, but what could be wrong ? is it a hardware issue ? Moreover, sometimes when I want to shutdown my laptop and click the shutdown button, suse do logout, but instead of turning off the laptop , it brings me to login screen, clicking the shutdown button at login screen makes my hdd lamp blink and thats all.
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Aug 10, 2010
Not able to login to a user account, even after clearing the password from root using passwd -d
[root@ivrsdb1_pnq /]# passwd -S oracle
Password locked.
[root@ivrsdb1_pnq /]# passwd -u -f oracle
Unlocking password for user oracle.
[code]....
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Mar 9, 2011
I setup my evolution to get this forums news. (eg. threads and posts). However, I can't get them because it give me this: I keep entering my forum password over and over again but I can't authenticate :S And you might also need to check these: [URL]
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