CentOS 5 :: How To Enable A Screensaver At The Login Screen
May 22, 2009
Does anyone know a way to activate a screensaver at the login screen? I've got about 5 machines here, and I'd really like the ability to just have the screensaver come on after 5 minutes of sitting there with nobody logged in...
Even a way to blank the screen would be nice. However, if we were to blank the screen, I need to ensure that it doesn't do a DPMS blanking, since we use calibrated monitors here, and turning them off sucks.
Alright guys. I need to find a way to enable a black screen screensaver (or turn off the monitor, or something to avoid burn in) while the machine is sitting at the login screen and completely turn off the ability for the computer to sleep. how I can accomplish that?
I've got Ubuntu 9.10 with a user account for my wife, and one for myself. "Wake-from-screensaver" should result in "choose user" without having to enter any password. I know how to do that in Windows, but I'm not good with Linux (yet). get past the login screen without passwords (after booting, and after choosing "switch user"), but once the screensaver kicks in and I wake it up again, the system does not present the "choose user" screen. Instead, it either turns off the screensaver and presents the desktop of the most recent user, or (if the screensaver is set to lock the screen) prompt for the user's password (which can be handily surpassed by clicking the "switch user" button and choosing the same user again). So, the login ("choose user") screen has been dealt with. How do I make the (any) screensaver return to the login screen at wake, rather than to the current user's desktop? Windows can do this, I'm sure Linux can too - but how?
How do you enable a login screen? When I turn on my computer I only get command line. When I log into root I can start my KDE desktop using startx. But if I log into any other user I get the following errorX: usser not authorized to run the X server, aborting.giving up.xinit: No such file or directory (errno 2): unable to connect to X serverxinit: No such process (errno 3): Server error.
We use Centos 5.3 which we deploy to dozens of boxes in different buildings throughout our shop. I set up KDE to be the default windows manager for these boxes, although the individual users can choose for themselves. We use LDAP authentication, and typically logging in through the LDAP into KDE goes without a hitch. However, a couple users are having problems logging in to their accounts through KDE, my boss and my boss's boss to be specific. We have NFS shares which serve up each users home directory regardless of where they connect in our system. When my boss, or his boss, try to log in, they put in their credentials, and LDAP accepts them, but KDE never starts. The splash screen which displays that it's "initializing system services" or "loading desktop" doesn't even come up, it just has a picture of the desktop with a cursor, and hangs there. I've tried deleting the .kde directories in their home folders, but that doesn't work. Those two are the only accounts out of our entire system that have problems logging in to KDE, and I have no idea why! I've looked in the .xsession-errors file, here's a copy code...
I know it isn't the xset or "no profile" errors because all the users I've checked get those too, but they can log in just fine. Both xsession files on both users are almost identical to this one, it just seems that KDE will never start.
One of my colleagues was working on my system (Centos 5.6). He deleted some files from the /tmp directory (he thought he was cleaning up files). Right after that, he rebooted the system. I now can no longer login.
Prior to this, here's what I see following a reboot code...
no matter what I use, I cannot login -- it takes me back to the (none) login: prompt
Any ideas? I know that deleting from the /tmp directory could lead to catastrophic results, but he thinks he only deleted a specific set of files.
After checking "enable desktop effects" in KDE. I'm dropped to login screen and can't login. How can I enable desktop effects? (As a solution to not being able login after checking the box I found that deleting kwinrc in .kde/share/config/ should help and it worked, so this is not a problem).
i have already checked system>preferences>screensaver. activate screensaver after 8 min of idle but i just get a black screen?when i click preview it does show the screensaver, but it doesn't show after 8 min idle
I'm using CentOS 2.6.8. It was working fine until yesterday. I tried to install openvpn into the system. I heard I need to download [URl} first and run it. But I got failed on doing sudo yum install openvpn I'm not familiar with the system, so I just give up the installation.
However, today, when I boot up the system, I can't run into the login screen at all! It force me get into kernel and I got
[root]#/user/bin/rhgb-client: error while loading shared libraries: libglib-2.0.so.0: cannot open shared object file: No such file or directory
when I try to use "ls" command, I got ls: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory
I think I ruined everything yesterday and totally panic now.
I just installed Centos 5.2 with a netinstall usb key. I had no Belgium keyboard mapping available during installation, so I chose a fr-latin1 layout. Now this is the default keyboard mapping for the gnome login screen, and for every new user on the system. How can I change this to a Belgium keyboard layout? I can change it for myself within my gnome session in Preferences>Keyboard, but I haven't found how to change the "global" or default setting.
We like the centos colour scheme but would like to add our own logo to the login screens and boot process of gnome. I have attached the two screens we would like to adjust in the install package. Where they are located and what the process of editing them will be?
Before we use CentOS 4 and all work fine. We start x11vnc by ssh like root. And after this connect by client login in X screen. In CentOS 5 this way don't work. For connect we must login by local from keyboard, start x11vnc ssh by logined local user, and after this we may work, but can't change users.
When I login to my machine I can see a BLACK screen and my mouse pointer. This is not happening with other users.Few days ago when I tried login to my machine I noticed this. I can access ssh session and do stuff there but some time I need GUI.I can login fine using other users. This is only happening with one specific user.I have just noticed that if I try loggin with the same user which have issues using NX client it shows us a BLACK screen, then if I open xwin then I can see three new windows top panel, bottom panel and Desktop.
My last setup (years ago) ran fluxbox so because it was familiar I installed it as a secondary to xfce right off the bat. I download a lot of different stuff because I like to try out all the apps I can find but somewhere I broke something. I can still run fluxbox fine, but nither the Xubuntu nor Xfce sessions will run now. Last thing I remember changing was pulse audio(removed it for an experiment I was trying with jack audio), not sure if it is connected but when I try to login to xfce the screen goes black, flickers a few times then it brings me back to the login screen.
I tried failsafe but everytime I do my monitor gives me a "frequency out of range" error. I tried purging and reinstalling xubuntu desktop and xfce settings but I am thinking its my xorg config. My laptop is a Toshiba satellite M305D-s4830 with ATI Radeon 3100 mobile graphics card and I am running Xubuntu 10.10. Unfortunately I also broke the screen, so right now I am stuck with an external monitor till I get a new one.
I have a Dell precision 380 (system specs can be found here: [URL]. My system is set-up in dual boot configuration with Windows Xp x64 on one side of my HD and CentOS 5.3 (64bit) on the other. My system came with 2Gb (2 x 1Gb) of RAM and I recently wanted to upgrade. I bought 2 x 2Gb ELIXER DDR2 667Mhz RAM. I carefully added the new sticks to my motherboard, booted up windows via bios which noticed the new RAM was present. All seemed well.
However, on rebooting the system and entering the CentOS boot phase, after the boot phase (eg starting program... [ok] etc) but before the login screen my screen goes black / blank. My system has an ATI FireGL v3100 graphics card, I checked out the technical info on this and it should be ok on 64 bit linux. (See: [URL])
I had a perfectly well running CentOS 5 system but with an old crappy monitor. I replaced the monitor by a bigger one, i did a monitor detect to make sure that CentOS would recognize the highest possible resolution. Then changed the display rsolution for the current user.
Now when i login as root just a black screen appears with a white mouse pointer and then nothing. I already deleted all the contents in the home directory /root but no improvement.
When i login as a new user X is starting perfectly.
Anyone have a clue what i need to do or delete to get X working again? I can nuke the whole box and do a reinstall but i'd rather not.
I am setting up a CentOS server that has no screen connected, and only has 2 Tesla cards. I have created a minimal xorg.conf and xinitrc file that doesn't load mouse or keyboard, and only creates two screens, one for each card at 320x200x24 bit. This is so I don't waste VRAM on a framebuffer I can't see.
I modified the xinitrc to just load tdm and nothing else as GNOME is a RAM hog. I am then using this setup to render stuff offscreen using OpenGL into FBOs which I read back to CPU and process. Currently for development I just run startx& when I login. I now want to know how to set x server to start automatically at boot. The CentOS docs say that it will try to load the GNOME login manager. The thing is that I don't want a login manager as it is useless as I login remotely via SSH.So:
1 - how to enable automatic x server in CentOS (im used to Ubuntu so not sure how to do this on Red Hat variants)
2 - leave x server running without starting login manager
I have installed VirtualBox and setup a Windows Vista host, initially with a .vdi of 10gb. That filled up quickly, so I added another 20gb secondary partition, after first trying to allocate a .vdi to a SCSI controller. Configured the drive in Windows (Computer Management), and all seemed ok. I shutdown VB, and rebooted my Linux host (openSuse 11.3). Now I keep bouncing back to the login screen, and can't login to Linux KDE, but can login to a console.I do have the following info:
I did see a message before, that I don't see anymore, that said it could not start NFS services due to missing entry in fstab. Another I'm seeing now is it couldn't start the avahi-daemon, no space left on device. This is odd, since I have a 200GB drive, with half of it left, only max 30GB set to VB. Here's my df -k output:
/dev/sda6 Use% is 100% devtmpfs Use% is 1% tmpfs Use% is 1% /dev/sda7 Use% is 46%
So root "/" is mounted on /dev/sda6, which looks like it could be a problem, but why would this suddenly be a problem after working with VirtualBox? Could this be a matter of just freeing up space on /dev/sda6? Like the /tmp folder that's under "/"?
It's very disturbing when making a Kiosk application, every time the lock screen and screensaver shows up, also many popup + battery or updates shows up. Where and how can I completely disable the lock screen, screen saver and alerts via a configuration file or from the terminal? I have the tried following but nothing works: failed
Is there an easy way to lock my computer screen without a screensaver running? What I'm trying to do is basically fire up a web browser or terminal window that I want to watch/monitor but lock my screen so that it can't be changed unless you know the password to log in as that user.
I'm running openSUSE 11.3 with an Intel GM965 on-board video card. After upgrading xorg-x11-server to 7.5_1.9.0-62.2.x86_64 from Index of /repositories/X11:/XOrg/openSUSE_11.3/x86_64 after a suggestion to fix a different problem, I noticed that the screensaver seems to work fine as mentioned above. However, I've noticed now that when the screen starts to dim before applying the actual screensaver I apparently can't cancel the screensaver initiation until after the screen finishes dimming (that is, goes completely black) and the screensaver actually starts. No amount of mouse gestures, clicks or key strokes will cancel the screensaver once the screen starts to dim until the screensaver itself starts running.
USB driver bug exposed as "Linux plug&pwn" or this link.Two choices [GNOME, Fedora 14]:
1 - use the gnome-screensaver
2 - use the "switch user" function [gnome menu -> log out -> switch user]
So the question is: which one is the safer method to lock the screen, if a user leaves the pc? Is it true, that using the  method is safer?Why do i think this? - The gnome-screensaver is just a "process", it could be killed. But if you use the log out/switch user function, it's "something else". Using the "switch user" function, could there be a problem like with the gnome-screensaver? Could someone "kill a process" and presto...the lock is removed?Could the GDM [??] "login windows process" [e.g.: a picture of it] get killed and the "lock" gets owned?
p.s.: if the  method is safer, then how can i put an icon on the GNOME panel, to launch the "switch user" action by 1 click?
running 10.04 Netbook edition. I would like my screen to lock after the netbook goes to sleep but NOT after it enters the screensaver. is this possible? i use my laptop to read in the university a lot and to save power tell it to go into black screensaver after a minute of inactivity. if i enable the lock option i have to enter the password each and every time after the black screensaver activates. but if i deactivate this option and then put the netbook into sleep/hibernate mode it doesn't ask for a password (which i would like) is there any way configure separate passwords for these instances or are they firmly linked?