Lightdm Lock Screen

light-locker is a simple screen locker that aims to have simple, sane, secure defaults and be well integrated with the desktop while not carrying any desktop-specific dependencies. Everything about X, Gnome, KDE, and everything running on it. A session starts when a user successfully enters a valid combination of username and password. May be some new changes will land in future updates distinguishing lock screen theme from login greeter. # lock-memory = True to prevent memory from being paged to disk. Until now everything works fine, but in start menue when clicking on “Leave” or “Lock screen” the provided options won’t cause any actions. The problem is in the locker. I can eventually get in via a recovery mode root access and then running lightdm or startx or it's equivalent. From my viewpoint the following sequence of events happens. How to Install LightDM Display Manager on Arch Linux February 1, 2018 Updated January 31, 2018 By Josphat Mutai LINUX HOWTO LightDM is a cross-platform X display manager that aims to be fast, extensible, lightweight and with support for multi-desktop. Thanks in Advance. Furthermore, lightdm controls are hard-coded to the top of the screen. I'm running VERSION="13. Thanks for responding. I could switch to a console with Alt-Ctrl-F1 and kill the screensaver to get back control. this solution doesn't work for me. I want use physlock as a locker. * What exactly did you do (or not do) that was effective (or ineffective)? Log into the system from the lightdm login window, and lock the screen. I am using the lightdm-gtk-greeter. A session starts when a user successfully enters a valid combination of username and password. You computer will never lock its screen again when it is idled. I am running a multi seat system with several graphics cards. I'm running Ubuntu 14. 18 (beta) are both resulting in a black screen on Ubuntu 16 with Kernel 4. ) It will prompt the user at the X display whether to accept, reject, or accept view-only the client, but if the prompt times out after 60 seconds the screen is locked and the VNC client is. Any ideas?. First of all, you have the Screen section which lists the resolutions that your X server will run at. ( lightdm-webkit-theme-aether ) Web Greeter Simple and beautiful Lock Screen library to set an check pin code. Nonetheless, LightDM has working support for gnome-screensaver. This provides all the required functionality listed above - an LCFG component has been produced to configure these. Enter your password to logon. The light-locker project is a fork of gnome-screensaver 3. By Launchpad Translations on behalf of lightdm-gtk-greeter-team on 2014-01-13. tried copying the. 04 is called light-locker. Hello all, I am using Fedora 31, I originally used KDE and then switched to GNOME. Install LightDM GTK+ Greeter in Ubuntu 14. We will also learn how to change the Login Screen background in Ubuntu 14. issue: screen does not update when laptop lid is closed for a while. Even after 10 minutes of inactivity, the screen is still awake. It is the default GDM (GNOME Display Manager) background since Ubuntu version 17. 04 Login Screen. Original Poster 1 point · 1 year ago. net/ubuntu. when i change background in "LightDM GTK+Greeter Settings", it changes login screen; not lock screen i installed manjaro xfce but intstalled mate DE. LightDM offers a command line tool, dm-tool, which can be used to lock the current seat, switch sessions, etc, which is useful with 'minimalist' window managers and for testing. There are not problem on this. However, LightDM has its own problems. Could you give me some advice please? P. Also the screen blanking and locking was not automatically invoked on inactivity and on top of that the monitor was no longer being put to sleep. This can be fixed by setting a custom keyboard shortcut for "light-locker-command -l" (this is the command used to lock the screen) or by following the instructions below. local exploit for Linux platform. Once you are logged in your own user settings take over. Light Locker is a new session locker for LightDM forked from GNOME Screensaver (3. 10) - 'Guest Account' Local Privilege Escalation. Having both applications installed at the same time may produce bugs or regressions, so it is recommended to remove XScreenSaver. Lock screen if I leave my seat?. How to disable the lock screen in the Home edition of Windows 10. It took me a while to discover that the default live credentials are root/toor. 1) + 7-inch touchscreen display. First of all, I want to let you know that I have tried to change the logon screen with Ubuntu Tweak under Ubuntu 12. Light Locker should now be used when locking the screen from the session menu or when resuming from suspend, but the lock screen keyboard shortcut won't work. 04 Trusty/13. I want use physlock as a locker. My system is windows server2008 enterprise without hyper-v, run as a guest OS on top of HYPER-V, I send ctrl+alt+del get to login screen, after I login as administrator, I get black screen except the mouse point on the screen, I can login as other account get normal screen, only administrator's account has this problem. 2)" When I startup Ubuntu Guest it locks up with a black screen. The symptom is that after entering the username and password in the login screen, they are unable to get in. Interestingly, if I go to the terminal and type out the command dm-tool lock then the lock screen sort of works. I will suggest to the maintainer to correct this in the package, but for all those with lightdm already installed, do the following:. Disable Login screen in LightDM/XFCE. Any ideas?. ? System components: openbox lightdm The package lxqt-policykit is installed. ** Package changed: ubuntu => lightdm (Ubuntu) ** Tags added: bionic now that I know that the "Lock Screen" button doesn't work correctly I know of other ways to lock my computer still the lock screen button should work and it looks like it locked my screen,but if I press "ctrl+alt+f7" then it magically unlocks So it is a security incident. Desktop Environment is not neccessary for Server usage, though. Allows users, for example, to use the icons in the system tray from the lock screen itself (to change the volume, the keyboard layout, etc. The new lock screen has more features than the last. I made this to use on a Lab of my University because gdm was buggy and we decided to install lightDM. How do I verify a download? * src/lightdm-gtk-greeter. And a few days ago I'm facing this issue with my Ubuntu. I am wondering if anyone out there is currently using freeIPA with smart cards along with LightDM. The installation of 361. I could switch to a console with Alt-Ctrl-F1 and kill the screensaver to get back control. Furthermore, lightdm controls are hard-coded to the top of the screen. I am trying to change my display manager and use LightDM but it will not start at boot - when I manually start it from tty and login using my fingerprint it loads my GNOME desktop environment but does not automatically authenticate my keyring or sudo some startup applications without entering my password again. Automatically lock the session after the screen saver starts. Gnome 3 has done away with a separate screen lock program - locking is now provided jointly by GDM, gnome-shell and gnome-session. This configuration window changes settings for the gdm daemon, which controls the graphical login screen for GNOME. Subject: Re: [Freeipa-users] FreeIPA with smart card using LightDM; Date: The > problem with GDM is I am not able to get screen lock feature to work across > multiple desktop environments. x LightDM is responsible for the login screen and we shall be modifying the LightDM Configuration file to add a boolean. 1) + 7-inch touchscreen display. gnome-screensaver-command --lock I chose to keep with gnome-screensaver since it is prettier. Summary: Black screen after unlocking automatic locked session Lightdm has no gui, what you see is light-locker unlock button > Hit the unlock button in lightdm screen, then the screen > changes to black. sudo apt-get remove lightdm Uninstall lightdm and it's dependent packages. Plasma Desktop Wallpaper 1573 5K 4K HD Wallpapers KDE Plasma. This can be helpful for users who normally use different keyboard layouts from the default and who want to have those keyboard layouts available at the login screen. Reset the password for ROOT or any user. 10 and upon that: sudo apt-get install ubuntu-desktop. I want use physlock as a locker. cryptsetup Suggested packages: keyutils The following packages will be upgraded: cryptsetup 1 upgraded, 0 newly installed, 0 to remove and 1507 not upgraded. I think there is little confusion over “stability” word here. Jun 08, 2016 · Fresh installed Archlinux, using lightdm, lightdm-gtk-greeter, and cinnamon When I login from the greeter, the screen keep black with a moveable cursor. Warning: When switching users using a display manager such as GDM or LightDM, XScreenSaver will not lock the original session - it can be accessed without a password simply by switching TTY's to the session in question. But I couldn’t set up the LightDM lock screen - when I lock my screen, I can see the default kscreenlocker lock screen, not the LightDM. The problem with GDM is I am not able to get screen lock feature to work across multiple desktop environments. The black/blank screen never goes a. I’ve setup my Raspberry Pi 3 to be a digital signage kiosk. It is a much lower resolution than the login screen. [09:06] what do you mean by 'running it by itself' ?. LightDM offers a command line tool, dm-tool, which can be used to lock the current seat, switch sessions, etc, which is useful with 'minimalist' window managers and for testing. We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company's internal notes and libraries through mini sites like this. How to disable the lock screen in the Home edition of Windows 10. Fixing the black screen after grub boot-up (screen/video settings mismatch) slackjp: 5 years ago 18 Reboot and wait to see the initial boot screen of GRUB with a list of operating systems. light-locker - screen locker. Posts about lxde lockscreen wallpaper written by taleofcoder. save hide report. 04 LightDM login screen. Anyone with the physical machine can carry them out, that’s the scary thing about … Continue reading "Unlock The Root Account, Reset The Root. Even when you change the lock screen through the user interface, the login screen still keeps the purple face intact. tapping the num lock key on the keyboard does toggle the num lock indicator on/off, suggesting that the computer is not frozen. sys-devices-pci0000:00-0000:00:01. By default the screen is blanked after around 10/15 minutes if no user input (mouse or keyboard) is detected. It may be called lightdm. I used to lock screen with this command, but it stopped working recently, probably after update. Having both applications installed at the same time may produce bugs or regressions, so it is recommended to remove XScreenSaver. 16-generic), and latest VBox 5. There was one problem with this. Watch Queue Queue. This will redirect you to VT8 (assuming that your open session was on VT7 and is now kept safe by light-locker) and present LightDM's greeter for unlocking your session again. If you want to revert the login screen to default then run the following commands to revert the default LightDM theme. service here. 10 (and others), running this command locks the screen and displays the display manager's login screen. Entering the password will return you to the system as you left it. Which command locks screen with lightDM? Ask Question Asked 6 years ago. How to disable Guest Login in Ubuntu 14. It can display notifications and detailed status information from a variety of apps. There are two methods to remove white dots from the LightDM login screen. 0, fix crash and change default config This update addresses a crash in lightdm, related to the way the user environment for the lightdm process is setup in src/process. 10 Quantal and If you have installed LightDM in Linux Mint 16/15/14 LightDM Gtk+ Greeter used in Lubuntu, it is light-wright interface, the LightDM GTK+ Greeter provides Linux users a quick, reliable, and accessible login screen. Abhisht02 OMG it is beautiful. This video is unavailable. lightdm-gtk-greeter work normally after boot. 0-drm-card0-card0x2dLVDSx2d1-radeon_bl0. To kill the wrong screen (cannot login VNC, or after login it is black screen), run below command: killall lxsession. Which command locks screen with lightDM? Ask Question Asked 6 years ago. 04 Started by jellybabyassassin , April 1st, 2014 11:47 AM lock desktop, lock screen, ubuntu 14. In order to get the login prompt I have to ctrl+alt+f1, login at the console, and run sudo systemctl restart lightdm, then I can login normally and resume whatever I was doing from before I closed the laptop lid. Disable Login screen in LightDM/XFCE. Then press ctrl + alt + f7 to go back to login screen , if these all solution doesn’t work , then uninstall and install again lightdm. Troubleshooting LightDM not starting and. There are 2 ways to change the login screen display of Xubuntu. png you define in /etc/oblogout. Next thing is that mobile operating systems don't like apps running all the time in kiosk mode, yes, Android has a feature to lock an app to foreground but there are. The problem with GDM is I am not able to get screen lock feature to work across multiple desktop environments. Also, the LightDM user appearing in the user list is simply because the user is created with an id >= 500. Yes, I'm using LightDM, and the lock screen is activated immediately once I hit the user switch button on logout dialog of MATE. The GNOME Shell environment is fairly slick and easy to use, and Unity users should have little trouble getting used to it. it only took me a good part of 2-3 days to figure out ,. Quick tips for Ubuntu / LightDM users: if you want to hide the LightDM login screen user list and / or the Guest Session for security concerns, because there are too many users or whatever other reason, here's how to do it. Need to get 0 B/208 kB of archives. Automatically lock the session after the screen saver starts. ? System components: openbox lightdm The package lxqt-policykit is installed. If you want to stay with lightDM as display manager, install the Lock Screen extension from Gnome. The distance between the windows and the screen edges is from a fork of i3, dubbed i3-gaps, created by Ingo Bü. The selected user can now be changed from the username and password entries with the up and down keys. lightdm_greeter_get_hide_users_hint () gboolean lightdm_greeter_get_hide_users_hint (LightDMGreeter *greeter);. This advisory describes a local privilege escalation via guest-account in LightDM found in Ubuntu versions 16. Summary: Black screen after unlocking automatic locked session Lightdm has no gui, what you see is light-locker unlock button > Hit the unlock button in lightdm screen, then the screen > changes to black. 04 ltsp-pnp but lock screen doesn't work on the clients? Thanks for any advice! Best regards, Antti Hynönen-----Dive into the World of Parallel Programming. And a few days ago I'm facing this issue with my Ubuntu. But then so is much else of GNOME3. Note that this list can be empty and it is recommended you show a method for the user to enter a username. Using these instructions, you'll get the complete Unity desktop environment with its default applications, including LibreOffice, Thunderbird, Firefox, Nautilus (Files), the Ubuntu Software app, the default Unity indicators, the LightDM login and lock screen, and so on. Hi all! I am using Ubuntu 14. py and swap in the commented lines if you need to emulate gnome-screensaver. No unlock prompt was displayed, but typing the password blindly unlocked the session. The Exploit Database is a non-profit project that is provided as a public service by Offensive Security. You computer will never lock its screen again when it is idled. This page was generated by GitHub Pages. The LightDM Settings entry cannot is missing in the KDE Settings. tried copying the. If you are using LightDM, as a workaround, install light-locker and run it alongside XscreenSaver. Ubuntu: How do I change the login screen in Ubuntu 16. The Best Linux Lockscreen. Using these instructions, you'll get the complete Unity desktop environment with its default applications, including LibreOffice, Thunderbird, Firefox, Nautilus (Files), the Ubuntu Software app, the default Unity indicators, the LightDM login and lock screen, and so on. 10 Quantal and If you have installed LightDM in Linux Mint 16/15/14 LightDM Gtk+ Greeter used in Lubuntu, it is light-wright interface, the LightDM GTK+ Greeter provides Linux users a quick, reliable, and accessible login screen. 10, Saucy Salamander". net/ubuntu. The default Ambiance and Radiance themes will be borderless in Ubuntu 14. CVE-2017-7358. It consecutively looks for the corresponding binary or exits with return code 1 if it fails to find any of these. Install LightDM. com - date: October 14, 2011 Hi I'm having an issue with the lightdm window manager I run x11vnc lightdm will allow me to login but will disconnect my vnc session before it loads the desktop I also have gdm on the same machine without an issue it will bring me to the desktop fine. On my fresh install of Xubuntu my lock screen looks very out of place. Essentially we wanted the raspberry pi to be hidden behind the screen with just a network cable and a HDMI cable coming from it. Description: When session is locked either using dm-tool or light-locker, lightdm greeter is functional (you can type your password and press Enter to unlock the session) but screen is not turned on, and remains turned off even when you move the mouse or press any key. - (1) Insufficient privileges. The "simple" unlocker then becomes a wallpaper that uses these components. now that I know that the "Lock Screen" button doesn't work correctly I know of other ways to lock my computer still the lock screen button should work and it looks like it locked my screen,but if I press "ctrl+alt+f7" then it magically unlocks So it is a security incident. There's some For LightDM (from 12. After logging in the connection drops again, but it's again possible to reconnect and see the desktop. I'm running VERSION="13. I created a. ** Package changed: ubuntu => lightdm (Ubuntu) ** Tags added: bionic now that I know that the "Lock Screen" button doesn't work correctly I know of other ways to lock my computer still the lock screen button should work and it looks like it locked my screen,but if I press "ctrl+alt+f7" then it magically unlocks So it is a security incident. You can disable the blank screen once with the following command line. com/Antergos Download. If you save the file in /usr/local/sbin/ it will not be overwritten by future upgrades. 10 uses the Linux kernel 3. Hovering over UI elements or clicking them has no effect. To remove it just run the following command in a terminal window: sudo apt-get remove xscreensaver. 10 logon screen image with a custom picture or solid color. * What was the outcome of this action? Screen got locked and the disply got turned off (monitor entered power save). Re: LightDM Recurring Lock Screen xautolock doesn't "detect that the locker is running" because, despite the name, it doesn't actually deal with lockers. The light-locker project is a fork of gnome-screensaver 3. It is the default GDM (GNOME Display Manager) background since Ubuntu version 17. png you define in /etc/oblogout. These simple tasks can be carried out even if you don’t have access to Ubuntu desktop session. One quick question, I’d like there to be a traditional lockout screen present after boot. Apparently lightdm does not start a new session on this seat after the first session is done. Automatically lock the session after the screen saver starts. 2 In the past when I wanted to change this item, I was able to do so by logging in as root to make the changes. ( lightdm-webkit-theme-aether ) Web Greeter Simple and beautiful Lock Screen library to set an check pin code. You can also access Cortana directly from this screen. 1 Settings and Tweak tool 15. 0 How to Change Boot and Login Background Image By tang xiao; 9/10/15 7:06 AM (not the lock screen or the grub screen, but the login screen). Openbox uses the *box visual style, while providing a greater number of options for theme developers than previous *box implementa. I am trying to change my display manager and use LightDM but it will not start at boot - when I manually start it from tty and login using my fingerprint it loads my GNOME desktop environment but does not automatically authenticate my keyring or sudo some startup applications without entering my password again. Timed locking. You can also automatically unlock account after some time. You can also access Cortana directly from this screen. The dm-tool calls the Lock method on org. 21-generic (secure boot = disabled). Basically, don’t leave it on at the login screen without anyone logged in. After restarting the Xserver, everything backs to normal, but when I lock the screen again, I won't see the pointer after login. IF you have set your wallpaper with a wallpaper coming from /usr/share/backgrounds, you will see that the background of your lightdm login screen will change to the wallpaper of your XFCE background. Setting environment variables. Installing gnome-screensaver apt install gnome-screensaver. Xauthority in your home folder and try again. This section might not list any resolutions at all. A common class of kernel or video driver bug is a blank or black screen on boot. When I try to manually lock the screen, for example by going to the shutdown panel button and selecting "Lock Screen", it doesn't do anything. This tutorial will show you how to enable numlock lamp at Ubuntu 12. I want to use LightDM instead of SDDM by default. On the lightdm config file there is this line: screensaver-timeout= I tried to put a value of 0 and -1, but both make the screen turn off after 10 minutes. This is not an issue with virtual terminal-based lock software like vlock, since the X server is in another TTY. How to install Lubuntu on 4GB USB Drive. Other important packages to keep track off is linux and systemd. Screen locking is highly dependent on the environment used. The accessibility menu items can now be activated with the F1, F2, and F3 hotkeys. Some Ubuntu users are reporting LightDM errors when using a SSD: about half the time when starting the computer, LightDM (the default Ubuntu display manager) doesn't load correctly and only a black screen and a blinking command line cursor shows up. 0-drm-card0-card0x2dLVDSx2d1-radeon_bl0. This will redirect you to VT8 (assuming that your open session was on VT7 and is now kept safe by light-locker) and present LightDM's greeter for unlocking your session again. LightDM is a cross-desktop display manager whose aim is to be the standard display manager for the X server. Doing this will lock the screen instantly. If you leave your computer for a few minutes, the screen will automatically lock itself so you have to enter your password to start using it again. To see a list of available commands, execute: $ dm-tool --help. Gnome Extensions by dams69. Now on the login screen, I have the default brownish Ubuntu default background. The installation of 361. Using these instructions, you'll get the complete Unity desktop environment with its default applications, including LibreOffice, Thunderbird, Firefox, Nautilus (Files), the Ubuntu Software app, the default Unity indicators, the LightDM login and lock screen, and so on. Prevent Your Raspberry Pi From Sleeping 14 Feb 2015 Written by Blake. synergy from user to root but not fixing issue. The lock screen on Windows 8 and 10 isn't just a background image or slideshow. # lock-memory = True to prevent memory from being paged to disk. Replace GDM with LightDM. Re: LightDM Recurring Lock Screen xautolock doesn't "detect that the locker is running" because, despite the name, it doesn't actually deal with lockers. 04, I am unable to login as root. When Ubuntu Touch is turned on no lock screen immediately appears, as applications will prompt the user to unlock if necessary when they are opened. Allows users, for example, to use the icons in the system tray from the lock screen itself (to change the volume, the keyboard layout, etc. LightDM offers a command line tool, dm-tool, which can be used to lock the current seat, switch sessions, etc, which is useful with 'minimalist' window managers and for testing. On the Kali Light version, which uses lightdm, this is at the top right corner of the screen. Regardless of where the image is located, including /usr/share/backgrounds, I get the same result: No background image, only a black background. This is how to lock Grub, systemd, LightDM, linux-firmware, the microcode packages and the kernel: a. 04 (clean install) from 14. How to disable Guest Login in Ubuntu 14. *THE ONLY thing ive found to lock the screen properly without issue is a gnome extension called "LightDM Lock Screen" , this puts a lock icon on the top bar, click it and it locks sending you to the normal lightdm lock screen which is what i want. If none of the more specific forums is the right place to ask. Lock the current seat. Lock the sessions when suspending the machine. I used to lock screen with this command, but it stopped working recently, probably after update. May be some new changes will land in future updates distinguishing lock screen theme from login greeter. then changing LightDM's config might fix it. Ubuntu's unity greeter signin screen will only accommodate a certain number of desktop environments. lightdm_greeter_get_hide_users_hint () gboolean lightdm_greeter_get_hide_users_hint (LightDMGreeter *greeter);. 04 LTS desktop, you will be greeted with a plain purple-colored screen. org Удалил в debian/xfce xscreensaver, поставил gnome-screensaver The screensaver is not currently active. Which this still seems possible, it's not easy to patch GNOME Shell as the GDM code is hard to decouple," Ancell explains. Install LightDM Rocks in Your Ubuntu Last month, at the Desktop Summit, Robert Ancell demoed a 3D animated login screen. On my fresh install of Xubuntu my lock screen looks very out of place. Just below that select the user name to which the automatic login applies. my lightdm maintainer hat on, I. sudo apt-get install lightdm After installing lightdm enter the following commands to set lightdm as the default diplay manager-sudo dpkg-reconfigure lightdm Then you will get the following screen-hit enter and then you will get this screen-Navigate your option to lightdm and hit enter. Having both applications installed at the same time may produce bugs or regressions, so it is recommended to remove XScreenSaver. Re: Mate screen lock issue Post by TrevorH » Thu Nov 28, 2019 3:47 pm I don't even have gdm installed but display-manager points to lightdm. 04) Using LXTerminal:. It means that each session starts with a fresh environment, unaffected by what previous guests did. Hi Daniel, thank you for your comment. The power dialogs can now be cancelled with the Escape key. 04 (clean install) from 14. And a few days ago I'm facing this issue with my Ubuntu. Robert Washbourne - 2 years ago - themes. sudo apt-get install dconf-editor. I test it against 2. Closing the lid will also not suspend the computer. It was working before but now it is just using my wallpaper instead, I can only changing the lock screen background image by also changing my wallpaper. Disconnect after login x11vnc lightdm location: ubuntuforums. Caveat: Notification popups will still be visible over the locked screen. CVE-2017-7358. I am running Xubuntu 18. 1) + 7-inch touchscreen display. 04? (Ohje suomeksi lopussa. kali linux 玩不一会就卡死,只能强制重启,win10正常 [问题点数:50分]. freedesktop. I think lightdm is the locker I actually have. Through Guest account, unauthorized or you can say a user's such as anyone with whom are not willing to share your Ubuntu system, may enter and use it if the system's screen is unlocked. No unlock prompt was displayed, but typing the password blindly unlocked the session. Disconnect after login x11vnc lightdm location: ubuntuforums. Essentially we wanted the raspberry pi to be hidden behind the screen with just a network cable and a HDMI cable coming from it. The installation of 361. The "simple" unlocker then becomes a wallpaper that uses these components. you'll get your screen courtesy : ask ubuntu. standard screensaver and locker of the X Window System: simple screen locker for lightDM display manager : light-locker invoke external screen lock in. Ubuntu comes with one of the additional account that you had not created, that's what called as Guest account/ session. * What was the outcome of this action? Screen got locked and the disply got turned off (monitor entered power save). Which command locks screen with lightDM? Viewed 21k times 10. Original Poster 1 point · 1 year ago. Timed locking. Any of you guys are having trouble changing the background image on the lock screen (Budgie DE edition). 04 is called light-locker. You computer will function fine until you reboot and then lightdm throws you lots of. Here's how you can disable & enable Guest user account in Ubuntu. I believe it depends on your display manager. Integrated with fingerprint authentication. Replace the gnome-screensaver as the lock screen with the use of lightdm as the lock screen and modify Unity7 to respond to Lock/Unlock events. 04 Started by jellybabyassassin , April 1st, 2014 11:47 AM lock desktop, lock screen, ubuntu 14. At this point your OS itself is ready to go but your packages need to be updated to run on the new major version via your preferred method, such as pkg-static upgrade -f for binary packages or portupgrade, orportmaster -af`` if you prefer to build ports. Fixing the black screen after grub boot-up (screen/video settings mismatch) slackjp: 5 years ago 18 Reboot and wait to see the initial boot screen of GRUB with a list of operating systems. png you define in /etc/oblogout. * What exactly did you do (or not do) that was effective (or ineffective)? Log into the system from the lightdm login window, and lock the screen. If you will want to disable your root account, then you need to type following command to the Terminal (press Ctrl+Alt+T on your keyboard) or use copy/paste method: sudo passwd -l root (then hit Enter). The problem is that the Micro SD card I was using became corrupted at one point and needed to be formatted so the picture was lost. light-locker is a simple screen locker using LightDM to authenticate the user. Automatically lock the session after the screen saver starts. this solution doesn't work for me. I want to be able to schedule the screen to turn back on. Every time, you start Ubuntu 14.