Ubuntu :: Locked Up - While Accidently Clicked "Switch User" On VNC Login
Jun 3, 2010
I started a remote VNC connection from my Windows pc to my Ubuntu desktop, got presented with the Ubuntu login screen. Entered my password and accidently clicked the "Switch user" key instead of "Unlock".
The login panel became grey and now I cant do anything (I guess its because there is no other user). When I exit and enter through VNC I allways come back at the same grey screen (see screenshot below).
Is there any way of bypassing this and unlock my ubuntu desktop?
The problem: (After clicking switch user)
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Jan 5, 2011
I've run into a strange problem with GDM that I haven't managed to find a solution for yet, either by trying myself or googling, and I have run out of good ideas. I'll just infodump here about the problem and what I've tried etc;
I installed Ubuntu on a new PC a few weeks ago, setting it up with autologin for my mom and a separate user for myself, using the on/off-icon menu in the top-right corner to switch to my own user and back as needed, and logging the user out when done. This worked quite well.
However, a few days ago, this stopped working; logging out or trying to switch now leaves me with a blank black screen, without even a mouse pointer (but not off, the backlight is on).
EDIT: To clarify, this is an issue that only affects the GDM login screen, but that affects it whenever it is used, wether it is on boot (when not set to autologin), after logging out, or when trying to switch user.
At this point, I can usually use Ctrl-Alt-F1 to get a textmode login, and Ctrl-Alt-F7 to get back to the auto-logged in session (assuming I tried to switch, not logout).
I can't think of anything specific I did or installed around then that should be related in any way...
I tried disabling autologin and restarting gdm, which left me with the same black screen (which is still there after rebooting), instead of the expected login window. I managed to re-enable autologin by manually editing the /etc/gdm/custom.conf file, so that it would at least work for mom.
I've also tried to change which user is auto-logged in, thinking it might be a problem with my user account, but both users get an automatic session just fine when I restart gdm.
I thought it might be a problem with the video driver, but that's not the case - if I run zenity --info as root with DISPLAY set correctly, the dialog box appears on the screen just fine. It has no borders or titlebar (there's no windowmanager), and is apparently without keyboard focus, so since there's no visible mouse pointer I can't click the OK button... But since it appears, X is apparently up and running just fine, just has nothing to display other than a black background.
I tried purging and reinstalling gdm and gnome-session(-bin|-common), but that didn't help any.
Running ck-list-sessions after trying to switch indicates that there's a new session there, with session-type = 'LoginWindow', so it appears to think everything's fine.
Enabling debug output in the /etc/gdm/custom.conf file did get me some more debug output in the gdm logs, but it didn't really tell me anything, there weren't any obvious problems that I could see.
After some looking around, I've guessed that it's supposed to be running gdm-simple-greeter, which I assume would display a login box; trying to run it manually doesn't work though (it's missing some environment variables, and trying to add them based on the abovementioned debug output doesn't really help).
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Aug 14, 2010
This morning a box that listed my wireless router came up. I usually click cancel and every thing is okay. Early this morning I clicked Delet. and now I have no wireless. In fact when I click on the wireless icon none of the neighbors routers show up.
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Oct 16, 2010
I've been running Ubuntu Maverick as a fresh install since release, and for the last 2 days, I'm having to log in twice! This is only on a locked screen, not on reboot or switch users. After the first login, I see the desktop for a second, then the screen goes blank. I wiggle the mouse and the login screen is there again. The 2nd login goes as normal.
I have gradually been installing things as I need them over the week since install, but I can't pin it down to any of those. It's getting pretty annoying when the screen saver kicks in!
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Feb 11, 2011
Apache is run as www as is all the files/folders. People are uploading via FTP, scp, so the problem is if I chmod so everyone can read, then rsync as a user it works until new files are added which then my ; if rsync fails with a permission denied. Now I can add a chmod in the script so everyone can read, but since www can already read, I figured I would just change my script to use www. I added the ssh key to his authorized_keys file, but when I try to just ssh in I see this in the secure file;
server sshd[29539]: User www not allowed because account is locked
sshd[29539]: Failed none for invalid user www from ip port 54983 ssh2
Now I read a few places already saying I need to add a password to the account, etc. but before I jump and try all I read, 1st major one, will this now break apache? Will this affect any startup things, etc. and .... will that unlock that user for ssh in or is there another preferred method?
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May 18, 2010
accidently deleated ubuntu lucid default theme,and lost the default user logon,it's now flat and gray.how to get it back?i still have the background, not the user logon
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Nov 4, 2010
I can't log in from a locked screen anymore, such as when returning fromeep or hibernation. I can, however, work around the problem by clicking "switch user" and logging in from the GDM greeting screen. Logging in from a terminal also works.I recently had a problem where /etc/passwd, /etc/groups and some other files were deleted. But I have restored them - otherwise I couldn't log in at all.
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Nov 24, 2010
i gave the permission (chmod 647) to etc folder without thinking much. and now i cant log as root and cant do anything.
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Aug 25, 2010
I am using Ubuntu 10.04 TLS from a pen-drive (running Ubuntu example). I created a new user account. When I lock desktop it correctly turnout the screen (everything go dark). When I move the mouse Ubuntu returns perfectly. My problem is that in any time I am not asked for password. I want that Ubuntu while locking ask for password to login again. I already tried configuring lock down and lock properties (application) via gconf-editor.
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Jul 21, 2011
I am trying to load up the NVidia driver in Fedora 15 and am stuck. After boot up the graphical login screen comes up fine but when I go to log in I get an error message and it asks me to try to login again. I need to be able to get into text mode so I can edit some files but I do not know how to do this other that starting in multi-uder mode by editing /etc/inittab (or in FC15, editing some links in /etc/systemd/system/). Is there a way to get to text mode from the graphical loginscreen or do I need to get a rescue disk and startup in rescue mode to change files?
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Jun 26, 2015
I have Debian 7 with LXDE installed on a msi-based-notebook. Immediately after i make the login (in graphics mode), the LED of "num lock key" turns on and lock,making the keyboard impossible to type properly.
I've tried to reconfigure keyboard,but it had no effect. And yes,i have tried to use the "Fn key + num lock" combination, but had no effect too.
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May 12, 2010
I've got an HP Netbook with Jaunty installed, and I've got an older Dell laptop running Debian.A friend of mine, on several occasions, has told me that when I left my computers unattended he could do some kind of series of key-strokes, and then a window comes up and he says that he can change the password for my account.I've asked him to show me how he does it, but he never will because he doesn't want me to be able to thwart himIs he lying, or is it for real? if it's for real, how do I go about changing it so that it can't happen anymore?
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Dec 5, 2009
I am having a problem with some users who get locked out after more than 3 failed attempts at login. This is exactly what I want to see - they will eventually remember those stronger passwords (maybe?) - but how do I re-enable their access? I haven't tried this on a live box but I can easily recreate the situation via vnc to the server in question and I assume the result would be the same. I like the policy that leads to this but I do need to let them back in - eventually. Where is the blacklist kept and how do I edit/reset it?
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May 22, 2011
Is there a config file to toggle whether the screen is locked after hibernation? I looked all over preferences but if it's there, I missed it. In Ubuntu, the screen was always locked after waking up. In Squeeze, it's going directly to desktop. It's not a biggie but you never know when someone might try to access your account so I kind of liked that it would wake up locked. Maybe it's doing that because I'm the only user on the system?
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Nov 13, 2010
The mouse was working fine until I pressed the 'lock' button right above it. Since then I have not been able to move the mouse 'once' I get logged in. The mouse works fine when in the login screen. I have tried resetting several times.The keyboard seems to be working, but I don't know where to go to fix the mouse, and I don't know many keyboard shortcuts
** Solved **It's been filed as a bug and has yet to be fixed:[URl]A code below was used effectively by many but made my system freeze when I started up. I ended up reinstalling. So just a general warning.
Code:
sudo mod*robe -r psmouse
sudo mo*probe psmouse proto=imps
[code]...
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Aug 8, 2010
While I was away from my computer a friend changed my keyboard layout to a random layout thinking he could revert it via mouse actions only. Unfortunately, by the time I returned, my screen was locked. Now I cannot unlock my session to get back in to the KDE session to restore the correct keyboard layout.
However, I can log in to a console. In the console (e.g., Ctrl-Alt-F1), the keyboard layout is unchanged, so I can edit any text files and make any other changes required. How can I change the KDE keyboard layout from a console? I'm running Kubuntu 10.04. There is no .kderc file in my home directory. And Xorg.conf doesn't contain the settings either. I'm not sure where else to look.
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Apr 6, 2011
how do I switch from auto logging in to the menu?I want to make this change via a terminal. ( I know how to do it from the gui )
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May 28, 2010
I have a problem with Switch User on a newly installed Ubuntu 10.04 on Asus Eee 1101ha.When I try to use Switch User, I just get to the Lock Screen of the currently logged in user, where I'm asked to enter a password.There is also "Switch User" button on the Lock Screen - the screen gets black and then gets back to the same Lock Screen. Login Screen is not displayed.
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Sep 23, 2010
I need to access some things in "documents and settings" folders (my windows xp crashed). I believe I need to be root user in linux to do this. I am running a ubuntu linux live (uninstalled) cd. I am new to linux and I do not know if this is even possible. I want to copy some things from documents and settings folder to an external drive (as backup) but I cannot access them as things are now (linux gives me an error when I try) but I would like to do it in gui so I can physically "see" everything and look through it.
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Jul 1, 2010
In FC13, when one user logs into GNOME and locks the screen, there is a "switch user" button so someone else can return to the log in screen and log in as well. But in KDE, there is only two buttons "Unlock" (for the current user) and "Cancel"
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Dec 14, 2010
I'm seeing really bad user login format under a standard installation and am wondering why ubuntu does this as default. I have noticed that the graphical login for gnome sizes itself to accommodate a user's exact password length. This indicates to me that somewhere on the unencrypted part of a standard installation with user encryption contains at least some indication of the content of the password length which seems a security flaw even if not a complete hole, it majorly reduces the number of attempts a cracker would have to cycle through.
And that's assuming that *only* the length is contained. Furthermore it seems that it would be MUCH better to simply display the number of characters entered into the pw field and allowing the gui to expand itself from an fixed size as the field is filled out so the the user still receives visual feedback for entering characters. Either a simple character count display should be entered into the field or a 10 dot to new line so that one can visually quickly count the number enter by multiplying from a 10base graphical observation.
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Apr 11, 2010
In Jaunty, I was using the fast-user-switch-applet, which puts a menu on the panel to enable quickly switching between users. The package does not seem to exist in Karmic, however. A search of Ubuntu packages reveals versions for Hardy, Intrepid, Jaunty, and Lucid, but skips Karmic.
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Apr 30, 2010
Login as myself, girlfriend wants to use her login to check something, all good.I switch back to myself, I get a black screen with just my cursor. Most annoying. I have to ctrl-alt-f1 to reboot. I've tried killing various process from the term, but nada. I've also tried uninstalling gnome-screensaver as was mentioned in another thread when I searched, but no joy there so far.
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Feb 18, 2010
How to do so? For starters, I'm not sure there is such an event. Maybe it has something to do with the OS moving through certain run-levels
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Dec 11, 2009
I am using the sudo command to log on locally as another user by the following command:
sudo -u theotheruser -s
or
sudo -u theotheruser sh
As I see it, this initiates a new shell with the mentioned other user.However, this doesn't load that users profile from his home directory.Is there a way to automatically read the users profile when login in with selected command? I am mostely interested in getting a working prompt when logged in.
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Nov 15, 2010
As everyone knows, the graphic user can be swithed with Ctrl+Alt+F7 (or F1 in Fedora). There are also a few text mode consoles - Ctrl+Alt+F2...F6.
Fortunately, there is a Switch User button when the screen is locked from Gnome with the default screensaver.
The question is how can a new graphical user be switched from console (Ctrl+Alt+F2...F6) if the screen is locked by some other screensaver which does not have this function?
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May 13, 2010
In our cluster, RedHat4 & 5 machines, if someone locks the computer and walks away no body can use it. Is there a feature in RedHat5, Gnome, KDE etc that would allow for the option of switching users at the lock screen, so more than one person can be logged in?
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Dec 20, 2010
All servers mentioned below run OpenSuSE, either 10 or 11.I am currently working on a few scripts that are meant to be used as part of a continuous integration setup. I am trying to keep these scripts reasonably secure, and so I have made sure that all the servers run these scripts only as a specific user (user1) that has permissions to basically nothing else. The problem I am currently running into is that I need to start and stop tomcat as user1 but this user doesn't have permissions to the tomcat rectory (only tomcat has execute permissions). I have a temporary workaround in place while I work on the scripts (I have an SSH key in place that allows me to SSH from user1o tomcat without a password and execute my commands that way) but it is not very secure. I have tried adding the following line to /etc/sudoers:
Code:
tomcat localhost = NOPASSWD: /opt/tomcat/bin/startup.sh, /opt/tomcat/bin/shutdown.sh
but it doesn't work as I expected it to. I tried a few different syntaxes for that line,
[code]...
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Jun 16, 2011
How you lock your screen, there is an option to switch user? well i wanna disable it because my brother always switches it and it slows down my computer
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Jun 3, 2011
yesterday I updated my fedora 13 to fedora 14 (on laptop) and today i cannot log in on user. It just go blank for a sec and is back to login.
At text console (alt+ctr+f2/f3) i enter my username and pass it give this for a sec and resets (clean) console
username: Name
password:
last used: [date]
login: no shell permission denied
i used unetbootin (fedora 14 netinstall to update) and later i updated 1,5G before reboot (did update that fix, forgot its name tho :s)
I would most likely reinstall everything, but i have some work at laptop and as death-line is near, i would prefer to fix it if possible.
edited:
i have installed F13 on unused space, is there a way for me to access and fix it? or at least get some files from there?
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