Ubuntu :: Switching Between Users Locks Up Computer - 10.04 And 10.10
Oct 15, 2010
Since upgrading from 9.10 to 10.04, the "Switch User" functionality no longer works. I had hoped that upgrading to 10.10 might resolve the issue, but no joy. I am using 32bit Ubuntu 10.10 on a Levono R51 laptop, with three users. 9.10 was installed from a LiveCD, and I have partitioned the hard drive so that OS is in the first partition, and the three home directories are in the second partition (just in case I need to do a complete re-installation from LiveCD). Most of time only one person uses the laptop, but if a second person tries to switch from the current session and log in, they are greeted with the following;
-- a black horizontal line (approx top quarter of the screen)
-- a purple background with the Ubuntu title and 5 red dots (lower 3/4 of screen) -- but no login screen
-- moving the mouse renders a white box (approx 1x1 inches) with some black marks
The original user can recover their session with Ctrl-Alt-F7, but this essentially makes the laptop only usable for one person (one active login) unless the original user logs off.
I'm using Debian Stretch with Gnome and Cinnamon. My desktop computer sports an nvidia geforce 970 gpu (this may be relevant, and it is the reason I had to go with stretch.) I'm not a very experienced linux user but I get along fine.
I'm sharing my computer with my mom and whenever we have to switch users, the computer seems to shut down for 35 seconds: the screen doesn't receive signal anymore. After a new user is chosen, it takes another 35 seconds to get to her session. This is embarassing because my os runs on an ssd and everything else is nice and fast. At first I thought it may be a matter of us two not using the same window manager or not using the "default" window manager, but changing window managers didn't work.
Today I learned about the existence of /var/log/syslog and I decided to check what happened to it when I switched users. I can't post the whole log of what happens because it is too big, but I put it on pastebin : [URL] ....
I understand almost nothing of what is written here, but I saw some interesting things:
- after 35 seconds intervals where nothing is logged, there is a stall on cpu detected (lines 68, 500) - my gpu seems to have something to do in all this
I'm running Fedora 15 64bit on a HP Elitebook 8740w. I have both Gnome and XFCE installed, and have only noticed this problem while using XFCE, but that may just be because I am using XFCE more than Gnome (that's another story - which I won't go into!). Anyhow, twice in the past 3 days I've been in the middle of using the PC, and it has "locked up". By that I mean, using the keyboard and mouse have no effect. The display does not change, moving the mouse does not move the cursor from it's current position. And keyboard commands seem to have no effect (I've tried ctrl-alt-backspace, ctrl-alt-delete, and alt-F1, alt-F2, etc.). The only way I can continue using the computer is to hold in the power button until it powers off.
I suspect, but can't be sure, that it may only be a problem while I'm in XFCE. The reason I say this is that the first time it happened, I was trying to do a screen capture using The Gimp while in XFCE. Today I also tried to do another screen capture (again whilst in XFCE), and X kicked me out back to the login prompt. I then logged into Gnome and was able to successfully do the screen capture. Later in the day I was using XFCE and programming in SpringSource Tool Suite, when the "lock up" occurred again, requiring me to switch the PC off again. I've had a bit of a look in /var/log/Xorg.0.log.old and it finishes like this. I'm not sure if it is enough info to track down the problem though?
I often need to login into various accounts. In Debian 7 I always was able to copy and paste passwords from text files if I was asked for an input, but now the textfield for password input locks the whole system and I can't do anything else before I have supplied the password. Is there any way of restoring the old behaviour to make password input forms (like the request for GPG key passwords in Evolution) just being an addintional app-window instead of an input request, that locks everything else? I want to be able to open the proper file with the login data when prompted for it.
I know I could theoretically solve this issue by using a general system wide main key which would supply all individual login data, but I want to memorize some often needed phrases by actually typing them when I need them. I just want the possibility to open text files for copy and paste when I'm prompted for a password if this is something I don't even want to remember.
About a week after installing 11.04, I started noticing that my computer basically locks up after leaving it for many hours. When I come back, I cant get any programs to respond. I click on Firefox and it takes about one minute for it to finally respond. If I try to launch Konsole, it locks up too. But suddenly all programs start responding at the same time, after about one minute.
This is very frustrating and I just feel the problem is zeitgeist. Of course I am not sure because I cant even run System Monitor to check the problem since I cant run any apps for about a minute. By the time I run System Monitor everything is working again.
so i just bought a new Sony Vaio laptop and things are seeming to run great. However, there is one issue: when i go to restart or shutdown the computer, the graphical interface goes away like it should, it goes to CLI and does it's shutdown routine....the problem occurs about 2 seconds into the routine, when it just stops. it doesnt shutdown or restart, but stays in the CLI with a blinking cursor. if i allow it to set for a couple of minutes, a message pops up that says something like this, "BUG: soft lock up CPU0 CPU1 stuck, blah blah". any ideas on what this is or what is causing this? the laptop has the i5 processor in it, just in case that matters
so every time I want to watch a video or let my computer play some music anything that leaves it without input the screen dulls then the computer locks it self even in the middle of when I am watching something.I have already set every power management setting to never turn off and it is still doing it is there any thing else that controls ubuntu's automatic functions that I have missed that would let my computer stay on without locking up,I am running the most recent version of ubuntu on a Samsung NC-10 netbook if that helps
Recently, ive been having this problem with ubuntu in which while im watching a movie and thus not doing anything else, everything locks up except for the sound (if i attempt to move mouse doens't work) and then it goes into the login screen. Previously, ubuntu would fade away into the login screen.
So is there any way to prevent ubuntu from going to the login screen if the user is not moving the mouse? non-fading login screen?
edit: oh and i also have this sometimes occuring problem where i type my password to login, it logs in, and then it immediately goes back to login screen. A second login works. probably not relevant
I am running edubuntu in one of the classes of the school i support. My problem is that the children cannot remember the password for the computer if it locks. I have it set to auto login on the class user and I have disabled the screensaver asking for a password on resume, and disabled the powerdown options. So in theory it should stay on the desktop until they shutdown. However there is still the option to lock the computer and i am sure that they will find it and manage to lock themselves out of the computer! I am a linux beginner, but i have followed a few guides on the internet. I could really do with having their user with no password, so if they accidentally lock the computer they only have to click unlock to resume their computing.
I just installed 10.04.2 Desktop. Full install, reformatted all partitions. Hardware: Dell Optiplex GX200 with Dell 781p monitor Dell mouse and kybd.
All appeared to install well and as expected.
The computer has locked up 4 times, now. Whenever I attempt to use the mouse to drag a window to a different place on the desktop the monitor goes half black (bottom half of screen) and I loose the ability to use the mouse or keyboard to provide input. The only recourse is to shut it down hard and boot up again.
I have POPFile in my startup applications. I know how to automatically kill it when login out but cannot find a way to kill it if I just switch users (other than manually stopping it). It's important to kill it when using the switch users function because the new user will have access to the old user's POPFile database, have access to his email, etc, if I do not.I have a "lynx -dump http://127.0.0.1:8080/shutdown &>/dev/null" line in my /etc/gdm/PostSession/Default file that shuts down POPFile at log out. I need to do the same or something similar when switching user. Is there a way?
my mother woke up and came in here to get online and when I hit her name on the sign in screen its just stuck with her name on the screen So she woke up me and I hit CANCEL SIGN IN and now its stuck on CANCELING..... And its been like that for 10 min I am too scared to do ctrl alt backspace because its going to log me off of everything
I have been experiencing issues when switching users since my last update; I filed a bug, but I was interested if anybody else was having the same problem:URL...In a nutshell the computer freezes temporarily during the switch user process. The longer it is running, the longer the freeze lasts. When frozen the screen is black except for a mouse pointer; but the mouse and keyboard are not responsive including the usual X command keys (Ctrl-Alt-Del, Ctrl-Alt-Bksp, Ctrl-Alt-F1, etc.).When I get the chance I am going to rollback gdm to see if that makes a difference.
I want to execute a bash script that switches user and then executes a series of commands. None of this users have root privileges. I guess I have to edit the sudoers file to give user1 (the user executing the script) privileges to be able to log as user2 with no password prompt. I've been looking for this example but I haven't found any.
I have an external USB drive that is NTFS. It mounts fine under my account and my wife's, but only if I fully shut-down the computer between switching. While switching users or logging out then in with a different account it will not mount the drive. I am not sure what to do... but we both access data from the same drive.
I just upgraded from 9.10 to 10.4. I am having the following problem:
When I attempt to switch from the user that I am currently logged into, to another user who is also logged in, I get a black screen.
To elaborate, here is the exact sequence of events:
Code: - Boot ubuntu and login to user A - Then Click on power menu (top right corner) and select: Switch from A - I get the login screen - I select user B and enter my password
[Code].....
I did try to change my session (at the login screen) to gnome-failsafe, xterm, even kde, but still I get the black screen.
First, I upgraded to F15. All went smooth. No problem. But if I pull up a terminal in KDE via menu->utilities->Terminal, I get a terminal that shows only 3 lines. If I try to increase the size by pulling the edge it locks up the computer. Functions otherwise. This is Gnome Terminal 3.0.1. X terminal works fine. So does Konsole. But not the above application from the menu.
I'm facing an odd issue with my Ubuntu 10.04. So, I have WLAN activated and working on my user account. Then I switch to another account on the same computer and nm-applet tray icon disappears! I have activated the option that all users may use the WLAN connection, but the tray-icon doesn't show up for other users. Only the one who logs in first sees it. Network connection is working properly, but the tray icon would be handy.
Trying to start nm-applet manually in terminal results in an error saying that nm-applet is already running (sure it is, on the first account that logged in). But is it possible to have the tray icon visible for all users?
When switching off an HP dv-2140us with a fresh/clean Ubuntu Lucid install, an audio pop noise can be heard, similar to a DC transient on a loudspeaker.This has happened before on an old computer of mine (as reported here), but newer Ubuntu releases (including Lucid) have fixed the issue.
I seem unable to get an nvidia driver working properly after upgrading to the latest kernel with Fedora 11.Here is my laptop and its specs: http://h10025.www1.hp.com/ewfrf/wc/d...reg_R1002_USEN[URL]I've tried both the kmod and akmod unsuccessfully. Everytime it gives me a black screen on boot, I can fix the problem by popping in the LiveCD, and changing the xorg.conf file back to the backup.Here are the errors/warnings from my boot.log file:
Code: WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/. Checking for module nvidia.ko: [60G[[0;31mFAILED[0;39m]
I have a problem where the resolution during bootup, shutdown, switching users, and the theme icons look very grainy & cheap. It might have started when I booted in failsafe graphics mode and after that, it never went away. Could be wrong about how it happened but is there a way to get out of failsafe mode? Or a way to reconfigure default, normal graphics?
I am having issues with sharing an external hard drive with other users on a computer. For example if I reboot and login with user A and then logout and login with user B, I am not able to mount the external hard drive. If I reboot and login with user B first, I can then access the external hard drive with user B but not user A. Is there a way that both users can use the drive without having to reboot every time?
I am assuming this is some sort of security issue. If I login with the second user and go to /mnt/external harddrive I get a permission error."You do not have the permissions necessary to view the contents of "External Drive"." If I login with the first user and try to set the permission it doesn't give me the ability?
I occasionally have friends using my home computer. They just use my account.There are some files that I want to hide/protect from people using my computer. It's not that I need highly secure encryption, it's more like I want to make sure people don't accidentally see my porn collection if they borrow my computer to check their email.Is there a way to set up a folder such that it's required to enter a password (e.g. the admin password) to see it's content? Probably I could change the owner of the folder, so that I can't access it without password?How do you protect/hide your secret or intimate files?
copy the users to one computer to another?I've tried to copy the /etc/passwd , /etc/shadow and /etc/groups but when arrives in the login screen it's like it can't open the screen and try again and again...
I've just added my wife as a seperate user on my desktop and have a question about shared network folders. So /etc/fstab mounts network folders from a second computer and until today I've mounted them to /home/David/NetworkData
This of course means that when my wife logs in she won't see them since they're not mounted to her home folder. So what folder should I use and what tricks so that we both have it visible and accessible in Places from the top menu?
How can I configure a single computer to work for multiple simultaneous users? I would like to have multiple keyboards and monitors on a single PC ... Is it possible? This set up I'm planning for CyberCafe, For cyberCafe business ROI is very slow... so was planning to have something like this....
-single CPU (Which would act as a server) -Multiple monitors, keyboards, Headphones etc....
If this works out then I would save a lot on my investments (OS cost, Hardware devices, electricity etc)
If I want to add Windows & Mac users as Samba users, must I first add them all as Ubuntu users? If so, since none of the other users will actually be working on the Ubuntu Server, how do I disable the other non-admin users on the Ubuntu Server login screen. I am using Webmin to administer some server settings, and command line for others.
i have a Domain Cotroller installed on Windows & DHCP Server installed on Ubuntu. i want to give access only authenticated Users(Active Directory Users) can get IP from DHCP. No one else canis there any option available here in DHCP ???
how to map all domain users form group Domain Users to local group users (and maybe some more)? Im using Ubuntu 10.04 x32. Its connected to my domain using Samba and Winbind, I can login using my domain credentials, automatically map user folder form DFS server, but I think that domain users have too much priviledges in the system and want to restrict them as much as possible
