Red Hat / Fedora :: Remote XDMCP Connection Ending Every Two Hours?
Jun 16, 2010
I am going through cygwin's XWin.exe (XWin - queary <hostname>) to start a remote session with a RHEL 5.5 workstation. I have run gdmsetup on the worksation to allow the remote connection. Starting the remote session goes off without a problem. After about two hours, it just exits and I have to start over. This is a problem since all my gui's are killed and I have some important processes running.
/var/log/syslog/messages shows:
Jun 15 16:49:53 <host> gconfd (root-12016): SIGHUP received, reloading all databases
Jun 15 16:49:53 <host> gconfd (root-12016): Resolved address "xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only configuration source at position 0
Jun 15 16:49:53 <host> gconfd (root-12016): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 1
[code]....
There must be a 2 hour timeout set somewhere - maybe in a gconf xml file?
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Jun 25, 2009
on Debian/Ubuntu in the login form (i suppose it's "gdm") from the bottom right corner I can pick the option to login to a remote XDMPC desktop (that of course I enabled on the other side..) the network is checked for those open XDMCP service and finally, the login box appears and i can remotely login to a "graphic terminal".
How can I do the same in Fedora? I found some guide about Xnest, Xzephyr, but I was totally unable to find a way for doing this simple task.
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Jul 17, 2015
I'm trying to get an laptop running more or less like a headless server, my reasons are not all that serious. Mostly I want to leave the laptop running as a seed box when my main PC is turned off, also want to setup it up as a media top, common place for media files and playback on Tv. So essentially I want to be able to access the remote machine, preferably sharing the same session and persisting while I log out from remote.
What I've done:
setup keys for ssh to connect automatically between machines, so I can login via terminal, access the file system without issues, which is already a great step. enabled remote access on remote machine lightdm manager setup deluge for daemon torrenting, which enables almost seamlessly client to connect remotely (though deluge is not the best with speed)
What I've tried so far:
Connect directly with a new X session
Code: Select allX -query your_server_ip :1
Works alright, creates a new display (:1) which is oddly in F2 tty instead F8 as is expected. Works alright, not much lag, audio is not routed.
But an issue! whenever I decide to log out X will simply shutdown, screen goes black and I can't resume on my regular session on my local machine.Connect X with nested Xephyr session
Code: Select allXephyr -query your_server_ip -screen 1280x1024 :1
This works too and might be the best solution yet, a windows is created and the remote session is nested in your current X session. Visual and performance is ok. Only real issue is that session is not shared, eg, application will not remain running...Connect via VNC
So it seems only solution for shared sessions is VNC.
With the remote desktop apps from KDE (which is the DE for both), I can connect buzz around and etc, but its kinda cumbersome and laggy, password always resets and I usually need to accept on the remote machine.
I've tried setting up lightdm to allow a vncserver at logon, but this is erratic at best, took a long time to get the Xvnc command correct enough for me to login remotely, and even then got a garbled screen and the X session wasn't even the same...
So that's it... Isn't there a way of regular X session sharing in the remote computer? Or a better solution for lightdm vnc invoke?
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Nov 8, 2010
on a openSUSE-11.3 how do I configure lxde so I can access it via a remote XWindow server via xdmcp?
Entry /etc/sysconfing/displaymanager:
DISPLAYMANAGER="lxdm"
DISPLAYMANAGER_REMOTE_ACCESS="yes"
Entry in /etc/sysconfig/windowmanager:
DEFAULT_WM="startlxde"
[Code]...
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Mar 16, 2010
I've been used to using RDP on Windows to remote to machines, and I've got an asus eee 701 which I want to use to do some *nix programming on. While the eee is a lovely little machine the screen and keyboard are a little small to use for lots of programming. I've tried using Xming (the free version) to remote login into the eee from my desktop using XDMCP (or even using a ssh session as a straight X11 server and no desktop on the eee) the whole thing seems seriously slow over wifi the initial desktop takes at least 5 seconds to paint (might even be 10 seconds I haven't actually timed it). So my real question is what do other folks use for remote control with a GUI for their *nix boxes? I am finding it hard to believe the performance is so bad over a wifi network (It makes the Mac IIs I used to use a college in 1988 seem fast) or is this just a problem with Xming and using say the Cygwin X11 server would be better.
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Nov 30, 2010
I need to setup a xdmcp server on ubuntu 10.10 to allow for remote connections. Obviously this cant be done from the login window as with previous versions of Ubuntu.
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Apr 3, 2011
I use XDMCP from an old laptop to login remotely to another computer which is running Debian 6. This seemed to work fine in Debian Lenny, and the laptop screen would switch off after a period of inactivity as I expected. Now the laptop screen blanks after inactivity, but the backlight never switches off.
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Mar 9, 2010
I have a Dell Inspiron 6000 laptop running Fedora 12. Recently my wireless connection has begun dropping every few hours and not reconnecting. After trying for about 30-45 seconds, the WPA password prompt comes up but still doesn't connect.
Fedora release 12 (Constantine)
Kernel Linux 2.6.32.9-67.fc12.i686
GNOME 2.28.2
Memory: 2.0 GB
Processor: Intel Pentium R 1.60 GHz
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May 6, 2011
I had Xming working great with XDMCP on my Debian 6 server at work. I had to replace the UPS and when I brought the machine back up xming/XDMCP no longer worked correctly. When I launch Xming and connect to XDMCP session I get the Xming window, the X Cursor but the GDM login window never appears. So I am getting some level of connectivity. The only change that was made to the server was that OpenVPN service was turned on. I do not know if this is the right log to be looking at but /var/log/gdm3/:0-greeter.log has this in it a number of times:
(polkit-gnome-authentication-agent-1:2252): polkit-gnome-1-WARNING **: Error enumerating temporary authorizations: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.EnumerateTemporaryAuthorizations() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.PolicyKit1.Error.Failed: Cannot determine session the caller is in
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Jul 27, 2011
I have a problem,I want to change the hour format from 24 hours to 12 hours, I cant find the way to do this,
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Jul 20, 2010
do not post such long blocks of messages directly on the forums. Attach the output as .txt or use a pasetebin.
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Mar 26, 2009
I've been able to use connect to my home laptop from school using VNC (and the Remote Desktop Connection program in f10), but since the graphics take forever to stream, it's almost pointless to use it.Is there any way to connect to my home computer, and ONLY get a Terminal?I've googled around and haven't found a concise way to do this... i'm so confused about how this stuff works (esp how it relates to SSH)
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Jan 22, 2011
Fresh installation of Fedora 14 x86-64 on Lenovo T510. I'm trying to setup graphical remote connection to this laptop via VNC. I installed vnc-server package and altered /etc/sysconfig/vncservers accordingly:
Code:
VNCSERVERS="2:awajda"
VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -localhost"
I found Remote Desktop which opens vino-preferences and ticked the check boxes there. I started vnc-server and then I tried to connect to it from the same local host using vncviewer. I got no errors and the window with correct resolution came up. The problem is - that window is black and empty. I tried looking into Fedora docs but I haven't found anything useful there. I tried google and I found about 487693746874363 solutions and different ways of installing and configuring VNC server. I tried a few - none helped.
I wonder if there is a decent and consistent documentation about how to make remote desktop working in Fedora without having a real pain in the ass trying out those gazillion tweaks and tricks from various forums and blogs? After all Fedora 14 comes with that Remove Desktop thing available out of the box. Is it a real working thing or just a marketing Should I uninstall all the preinstalled VNC stuff and follow one of those painful instructions found on the internet from A to Z praying for it to eventually start working after all the magic is done and hours or days are wasted?
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Feb 21, 2010
This applies to GDM as well, but I'm using KDM right now so:
Linux 2.6.31.12-174.2.19.fc12.x86_64 #1 SMP x86_64
I setup XDMCP:
/etc/kde/kdm/kdmrc
[Xdmcp]
Enable=true
Willing=/etc/X11/xdm/Xwilling
Xaccess=/etc/X11/xdm/Xaccess
[security]
AllowRemoteRoot=true
DisallowTCP=false
/etc/kde/kdm/Xaccess (link to the xdm 'xaccess' file) includes:
* CHOOSER BROADCAST
In KDM settings I set it to 'no theme' and 'no custom background'. IPTables & SELinux are both off. The client & server are both on the same switch. I can connect successfully. But all I get is a black screen & an X cursor, never get to see the login prompt. Most things I find have to do with the inability to connect at all, but this connects. I'm having this problem on RHEL5.4, CentOS5.4, & Fedora 12. I'm troubleshooting it on Fedora though. I'm not able to even log in.
I must point out that for CentOS5/RHEL5 I got this working, but I didn't do anything differently that I know of. I just repeated the same process over again....but I'm using GDM on those. Is it possible that I may have to use GDM for KDE because it works with GDM? I'd like to get KDM working because that's what it's designed to do right? work the way it's configured. I've not had a chance to look into it with KDM since the time that I posted this thread.
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Aug 28, 2009
My home linux box is behind a Linksys WRT110 router. I have enabled the Remote Desktop from System-->Preferences-->Remote Desktop. I then run TightVNC from my WinXP box. As I wish to run a secure connection, my first obstacle comes from PuTTY.
In PuTTY, my settings are as follows:
Host Name(or IP address) Port
xxx.xxx.xxx.xxx 22
SSH-->Tunnels:
[code]....
I recieve "Network error: Connection refused" I have gleened all of this information from other boards and tutorials. I know there is something critical that I am missing.
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Oct 18, 2010
Is there a way gnome can allow a remote desktop / VNC connection if no user is logged in? If the server gets rebooted I can't access it (remote desktop / VNC). Someone physically has to go there and log in. Surely there must be a way as gnome is running just waiting for a login.
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Nov 7, 2010
I have recently installed fedora 14 and configured vpn to access my work network. I need to access some windows machines which although I can ping I cannot remote desktop into. When I go to Applications>Internet> Remote Desktop Viewer and put in the machine name (either just the machine name or the FQDN including the domain name) I get an error "Connection to <machinename> was closed".
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Feb 12, 2010
I hope I won't get bashed too much on my first post here. The problem I'm experiencing seems to be well known, yet I haven't come across a definite solution to it while searching the forums. I've got an external drive connected to my laptop via eSATA. When I want to mount it as a normal user from GUI level, I'm required to supply the root password since apparently the system's policy doesn't allow external drives partitions to be mounted.
The closest solution to what I would like to achieve is given by giulix in this post. Yet, with the polkit-gnome-authorization utility removed from Fedora 12 (at least so I've heard on mailing lists), it's difficult to find out where to start in terms of policy editing. What I would like to have is being able to mount this volume as a normal user from GUI level. I know I could just add an entry to /etc/fstab, but it just seems so old-fashioned and tacky, and besides, it's not, um, "dynamic" and wouldn't utilize hal and dbus, so I wouldn't have an icon on the desktop. (it's not really the reason, I'd just like to have things done the way they should be right now).
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Jul 22, 2010
How can I manage to avoid double login to a user account in the server by remote users? Is there a way to block it or to hide logged user accounts?
I have two server, one f12, the other f13 (behind a firewalled router) and want them to serve desktops to anybody in the local network. User accounts in both servers are established as username: user1 password: user:1 , username: user2 password: user2 ....... Every remote user should take an available user on server but no multilogin to the same user. Remote users are no adult so they can mistake. That's the problem. On the remote dektop section unmark everyone can see my desktop didnt help.
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Feb 18, 2009
I am able to telnet to the server via a remote connection, but for some reason, it will not accept mail. ere is the bounce back email I am getting.Quote:This is the mail system at host smtp.mydomain.net.I'm sorry to have to inform you that your message could notbe delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You candelete your own text from the attached returned message.The mail system
<root@mydomain.net>: temporary failure. Command output: pipe: fatal: pipe_command:
execvp /usr/bin/perlbin/vendor/spamc: No such file or directory
Reporting-MTA: dns; smtp.mydomain.net
[code]....
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Nov 26, 2010
I am doing some R&D on 11g RMAN in oracle at home. i have installed oracle enterprise linux and i have installed oracle software. when i am trying to configure listener, it is error-ed out. i have verified that telnet with the port is not working and i am seeing connection refused error.
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Dec 31, 2010
I had an aging RH 7.3 server that I decided was time to upgrade the hardware and software as well. I chose Fedora 13.This server runs an ircd with several bots connected to it. The bot in question is a perl bot based on the old dreambot script. On the RH 7.3 server, it ran forever. On the new Fedora 13 server, it does an EOF and restarts every hour, exactly one hour after it's been started.Is there something limiting the time that a perl script can execute?
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May 17, 2010
I have had some problems with Evolution. It sometimes freezes on start-up: I have to force it to quit. If I open "System Monitor", and end the evolution-alarm-notify task, then I can restart evolution successfully. I therefore suspect it is that which is causing trouble. What is it and how do I stop it?
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Mar 1, 2011
Friday night I was working on some networking stuff between my two Fedora 14 boxes. I have my laptop and my desktop. on both machines I have "system-config-firewall 1.2.27" and "iptables" (i believe both come standard on F14?) I kept getting the same message as seen below before realizing perhaps I should check my firewall!
I added a rule for incoming and outgoing traffic on port 22 and was able to get in with no problems at all! however today I can't ssh into anything... I can't use "Remote Desktop Viewer 2.31.4" to vnc into the machine anymore. I can't remember the exact error message at this time, it's something close to "Connection was terminated" or "Unable to connect" I can update this message later.
last night I foolishly uninstalled the system-config-firewall and then uninstalled iptables to see if it was a simple firewall issue.... totally hosed my system <insert smiley!>
After reinstalling and realizing I didn't backup my documents <insert smiley!...again...> I started reinstalling all of my applications. I'm still unable to use ssh and I've tried to ssh my own computer.
Is this possible?
# ssh 127.0.0.1
ssh: connect to host 127.0.0.1 port 22: Connection refused
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Jun 6, 2011
I've recently moved from Ubuntu (after moving from Gentoo and Arch) to Fedora 15 and am experiencing some crashing.
What happens is after a few hours or not particularly hard usage (web browser, a couple of terminals, maybe having run a few Ant scripts etc) all the fans seem to go into serious overdrive. I can't move the mouse and the system doesn't respond to any keyboard input. After about five minutes of this, the fans slow down but the system remains unresponsive. I've left it for a further 30 minutes, still nothing so I have to do a hard reset.
My hardware is a stock laptop Compal IFL90. Besides the standard installed software, the only other things I've installed are;
- Sun JDK (and Eclipse, but not running during crash)
- Pogo Plug software (pogoplugfs which is started on login)
- Cryptkeeper for my encfs stuff
- Opera
Can anyone point me to a possible fix, or let me know what other information is needed to try and get more complete support? It's not to much of a problem at the moment, but when I start using my laptop more frequently, having to power cycle every few hours is going to make is to difficult to use.
Code:
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Mar 20, 2010
I am using Fedora 12 and i have enable XDMCP i have boot client with dhcp all is going well but when remote user logout than remote client display XDMCP: fatal error: Session declined Maximum number of open sessions. and after that i have reboot Fedora 12 server than it will work but after logout it will again create same problem.
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Sep 18, 2010
I have an Asus laptop with both Win7 and Fedora. Whenever I change the time in Fedora to the correct time and reboot into W7 the W7 time is messed up - about 7 hours earlier. If I set W7's time to the correct time and then reboot to Fedora, Fedora's time is then 7 hours early. For some reason I can't get both OS's to agree it's the same time.
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May 23, 2011
I noticed that the language es_ES (Spanish Spain), has a problem, you can't put the clock in 12 hours format, I was googling for a while and found that it should edit the file
Code:
/usr/share/i18n/locales/es_ES
Find these lines
Code:
am_pm "";""
t_fmt_ampm ""
and replace with
Code:
am_pm "<U0041><U004D>";"<U0050><U004D>"
t_fmt_ampm "<U0025><U0049><U003A><U0025><U004D><U003A><U0025><U0053>/
<U0020><U0025><U0070>"
But I did it and still don't show me the option to change the clock to 12 hour format, I tried changing the es_NI language (Spanish Nicaragua) and gives me the option of 12 hours, but the languages of programs like firefox, thunderbird, openoffice change to English.What can i do to have language es_ES and 12 hours format on my clock? or es_NI language with firefox, thunderbird etc. in spanish?
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Jul 24, 2009
I have Fedora in dual boot with windows on a laptop. I have a weird clock problem. If I get the clock set correctly in Fedora, then it's 4 hours too fast in Windows. When I fix it in Windows and then restart into Fedora, it's 4 hours too slow in Fedora!Why are they competing with each other and how do I get them to both be correct?
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Nov 18, 2010
I am using Gstreamer for creating one of my video streaming application. My application creates multimedia session and then stream around 200 video sessions (a very processor intensive job).In doing so, the no. of threads created is around 1500 and I have given around 1536 KB as my stack size for each of these threads. I have one Quadcore(intel Xeon) system of around 8 GB of RAM(64 bit) with RHEL 5.5(kernel - 2.6.18-92.el5). After few hours of testing I see that my overall memory(RAM) is eating up. I did checked the memory and I saw that my cache size is growing. So far so good, as I can understand that system does cache instead of leaving some RAM free.
My problem comes, when I see that after almost 20-25 hours of testing, RAM is continuously being eaten up and maximum part of that is going into cache. If I leave the system for few more hours I see whole of my memory is consumed up and now my swap started getting used. If I check the cache now, I clearly see most of RAM is now in form of cache. I still didn�t stop my application and allowed it run for few more hours and after sometime I see that process give segmentation fault while creating the pthread (create_pthread::unknown error 513).I also tried to observe the �core� file of application created in this way , but it doesn�t� show anything.
One thing I must mention that, in �top� I see almost constant values of resident memory, virtual memory and shared memory. There is no increase of memory usage here. So here I can assume that my application is not leaking the memory. I also observed that if I kill my application any time during this, the memory doesn�t go into free pool. Anyone, here can give any pointer for this kind of behavior. Is it can be because of some kernel BUG which is not freeing the memory to application usage.
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