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Is it possible to offer the thin clients a menu (over PXE) to choose from what the user want to do (select between different LTSP versions, thin or thick client, or even netboot a netinstall image to start installing an OS), please?
Sure. Use google translate on this forum post I've made -and check if the screenshots are what you want: http://users.sch.gr/alkisg/tosteki/index.php?topic=2828.0
Yes, alkisg, something like that would be excellent. But I've just learnt that pxelinux is a boot loader. Perhaps it's simpler to add other stuff to it appart from the LTSP kernel set up on "default". I'm exploring this now...
Yes, that's what is in the link I posted, a pxelinux menu.
I see, very nice, thanks! :)
Did you follow some docs to set that up, alkisg?
Not really. I did read the pxelinux website though.
I'd like to start adding one thing at a time and learn the system in the proccess. I mean, I'd like to avoid to create such a huge directory tree and start small.
Whatever suits your needs better. If you have problems, ask in the #syslinux irc channel
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Hi all! I am running Ubuntu Lucid LTSP and am experiencing high CPU usage from Xorg after some recent updates (maybe installs). Anyone else seen this or have any ideas as to the cause or problem programs?
|04:26||Nick change: frederickjh1 -> frederickjh|
Did you install italc?
itac has been installed for about a half a year alkisg.
Has it been known to cause this?
italc and vino-server may fight over the same port (5900) and cause high xorg usage
Try killing italc and ica and see if it helps, if so you can change the port number
ok, will try
OK, I did a killall for ica and italc. It reported not italc found and ...
a ps -C vino-server shows it is not running either.
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but killing all ica did drop the CPU usage.
Maybe instead of vino you have some other service in 5900, e.g. x11vnc
alkisg, is is better to change the port for italc?
Is there a webpage with instructions on how to do this?
What does this give you? netstat -nap|grep :5900
$ sudo netstat -nap|grep :5900
[sudo] password for ****:
It returns nothing.
Maybe ica was fighting with itself (one thin client over another)
(a race condition)
If you see it happenning again, check the output of netstat|grep ica
Unfortunately the italc maintainer isn't interested in accepting patches...
OK, will do I am going to try a reboot here in a bit to see if it will do it again and to see if I can figure out what starts it.
Oh, that does not sound good.
*developer, not maintainer
Yeah that was the main reason we stopped using it
What do you use?
We developed our own, it's not internationalized yet
Probably would be Greek to me.
Weird, I know I had problems with this in the past and had a script that killed off old ica processes that got restarted at boot. Now I find that the script is no longer executable.
going for the reboot, now
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I'm facing a display refresh issue with ltsp
it's for kiosk use
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when I start my client everything is ok
but after some minutes the screen stops displaying new data
an ajax clock for example
Does it hang? Or you can just refresh the page and see the clock moving again?
tcpdump shows that requests/responses are transmitted every minute on the server and on the client
but firefox isn't refreshing
a sample mouse move makes the screen to refresh
even if I kill firefox
it's still on the screen
Maybe some screensaver then, that holds the last image displayed on screen?
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Are you using the kiosk plugin, i.e. is firefox local?
I disabled the screensaver but the problem persists
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xset s off (.xsession)
I'm not using the kiosk plugin
but I'm using ltsp-localapps firefox
OK, try to get a `ps -ef` from when the problem happens
One way to do that is by installing ssh on the chroot
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(a `ps -ef` of the client, not of the server)
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alkisg, making my script that kills all ica processes at startup on the server seems to be working. No more CPU race event with the ica processes running.
Thanks for your help alkisg!8-)
I just have to mention that we are using linutop as thinclient
mastermed: cool. which version?
1 and 2
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and it's the same prob on both
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hi ppl, hi alkisg :)
alkisg: this summer I've to setup ltsp "fat version" for an elemantary (primary... 6-10 years) school, hope you will be often online :)
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mastermed: are you using the artec version or the linutop ones? artec made an "off-the-shelf" one w/ netboot afair
mastermed: i don't know if it makes a difference, but there's no battery in those boxes. dis you check what the time/date is right on your clients?
mastermind, does it work properly if you do not run Firefox on the client but on the server?
sorry I meant mastermed
it's linutop version and the time date isn't correct
Fri Jan 26 03:45:43 CET 2007
I'm requesting the correct time from server to showi it on firefox
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the web application is running with no probs using laptops
I need proprietary nvidia drivers and a custom xorg on one machine. From documentation I found I installed the drivers then rebuilt the image. Then I have put a line in my lts.conf for the mac address and "X_CONF=/etc/X11/xorg-Dolphin.conf" but its not booting that xorg.
Is there anything I'm missing?
I chaged the xorg to load nouveau incase it was a problem with nvidia and its still not working. I don't think it's picking up the lts.conf file. Is there a way to check?
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mastermed - You can fix the time on the clients with something like this:
# Keep the time on the client machines BIOS and the login screen up to date
in your lts.conf
What I was trying to help troubleshoot mastermed with asking if Firefox runs on the server ok but not as a localapp on the client, was do you have enough resources to do so.
Not sure what you are running in firefox but if it is video with the network card only being 10/100 on the Linutop 2 (and presumable on Linutop 1 as well) you can expect choppy video on YouTube and other video sites.
At least that was my experience. Moving to a Gigabit switch and nework cards is what fixed all that. I also turned of encryption on the client connections as well to save CPU cycles.
morning everyone life has been crazy
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frederickjh: thanks for the reply, but why should the time be correct on thin clients
It is up to you. People complained here that the time at the login screen was not correct. That lead me to figure out that the BIOS clock was not being updated to the correct Time zone.
I think that it's another prob
yes, I do to.
I would start to figure out if firefox runs ok on the server.
As opposed to on the client.
As a local app.
I have to start firefox locally to trace the client IP
Sorry I don't follow what you are doing.
using server firefox will result that all clients have the same IP in HTTP requests
yes, but we are talking about testing here.
that's why we use ltsp-localapps to run firefox
I juste want to tell you that even if it works ok it will not satisfy me needs :)
My guess is you may not have enough resources to run Firefox locally on these clients.
True but you will know what the problem is.
I don't think so
You are having the screen freeze up, right?
Or just firefox?
cause when running firefox I use top the monitor the ressources
Does it go grey when it freezes?
Maybe there is something that firefox needs to run but cannot access because it is not in the client image.
Example, if I run firefox on the client but do not have the archive manager on the client firefox cannot directly open archive files.
In your case maybe a plug in.
my prob is related with screen refresh
Can you run firefox on the client but start it in a terminal to see if anything helpful gets spit back.
firefox is getting the info from the server but it's not showed
moving the mouse will resolve that
just a simple move
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wakes up the screen
and it displays it all?
Do you have any other local apps on the clients?
Does it happen with them?
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no I just use firefox
with kiosk plugin for firefox
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all clients use mouse and barcode reader
there is no keyboard
also if I remove the network wire and move the mouse the time showed will be correct
cause it was already stored but not showed
it's really a strange prob
yes, sorry I don't know much about the kiosk plugin for firefox or if it could be part of the problem.
What is the video chipset on the client?
00:01.1 VGA compatible controller: Advanced Micro Devices [AMD] Geode LX Video
Googling there looks to be a number of kiosk plugins.
Sorry i need to go just now. I wish I could help more.
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ok, this is permitted right?
LOCAL_APPS_MENU_ITEMS = firefox,pidgin
that will make firefox and pidgin both localapps
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Hello. In LTSP-Cluster Control Center the attribute for LDM_PRINTER_LIST is set to be a multilist. When I enable this attribute the mutlilist box appears but I have no way of adding items.
Does anyone know of a workaround?
Ghidorah, you can use the printer manager for this
Hrmm, it doesn't appear to work for me
I click apply on my cups server to manage it
it just comes up with a blank multilist too
if you select the checkbox, then apply
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you get the printer list ?
I get two blank boxes
The first one is labeled Installed printer in the configurator data base
you have a cups server running ?
do you see any error on your cups server ?
Let me check
if you connect to you ltsp-cluster control server and type: $ CUPS_SERVER=<your cups server> lpstat -a
you get the printer list ?
I'm getting errors in the cups log... E [17/Jun/2011:14:14:36 -0400] Request from "localhost" using invalid Host: field "black"
d [17/Jun/2011:14:14:36 -0400] cupsdAuthorize: Authorization=""
Pardon my ignorance how would I execute $ CUPS_SERVER=black lpstat -a
Making some progress
sorry for the delay
I changed the cups server to localhost instead of the hostname
and it is working now
Thanks for your help!
you are welcome
but i didn't do much :)
yeah you did
I didn't think to check the cups log for this issue
I just assumed I goofed my LTSP-Cluster
how many thin client do you have ?
on like 2 applications servers ?
I have 1 apps server in the cluster right now since I'm only testing
depends if i add all of the about 6000, my biggest is arount 4000
4000 thin clients?!
on a 50 appservers farm :D
and I'm getting frustrated getting 1 going lol
not all of them are used at the same time :D
the first one is harder then all the others :)
because they are all identical so :) it makes it easy
Can I ask you what do you do for print drivers?
I've been having a heck of a time
with PostScript print drivers
we make sure that all of them are well supported by cups
What sort of steps did you take to qualify its support?
Not that it will help me now since we just replaced every printer in the building this week.
you should try to have only a few models of printer
Only got 3 now
ppd's are PS drivers correct?
not sure about this, ppd are needed by cups to speak to the printers.
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The problem I was having is the time to print
when I have a printer in cups setup with the PS PPD driver from the manufacture and print a PDF
(depending upon the PDF) it would take upwards to 3 mintues to print
But if I set the driver to be a Generic PCL6 driver
Do you do centralized home directories?
yes of course
Any pitfalls in the setup?
any tips you can offer?
dconf is a mess :)
which version of ubuntu are you using ?
my current LTSP servers are 10.04
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with 11.04 there is an issue with transparency on some intel hardware
mobile 4 and gma 965 or something
ah I only have old pentium 4's
are you planning to use unity ?
that was the first thing I changed
I installed 11.04 and was like wtf is this.
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I gave up with debian-ltsp and trying ubuntu, it boots but when I try and login it says there is no response from the server
I've updated sshkeys
ubuntu requires running ltsp-update-image after running ltsp-update-sshkeys
since it uses NBD by default ... unless you've switched back to NFS
ahh ok. thanks.
fossala: curious why you gave up on debian's ltsp?
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I couldn't get sound or my g/fs monitor to work. I will be moving back to debian after I've got my head around LTSP.
did you read /usr/share/doc/ltsp-server/README.Debian.sound ?
vagrantc: Thanks that worked, and its bloody fast. Yeah and I added the things to asound.conf but still didn't work (firefox/flash).
ah, flash could be doing anything
I got system sounds through (bleeps).
i haven't had to suffer flash much, though it generally is problematic for LTSP
It's now running on ubuntu ltsp-client.
I don't use it but my g/f only let me move the whole family network over to ltsp if flash works.
might have to go with localapps or fatclients to get flash working well
heh, or windows
I've got flash working perfecly on ubuntu, no localapps.
It is a 2.2ghz quad 16gb ram on gigabit network and its only serving 3 desktops.
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anyone here use OpenVZ or know why ltsp-cluster has a how to for it but ubuntu ltsp wiki does not
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does this work: put a webserver with a php authentication pages, then i assume there is a rdesktop java applet that you could put up and then have it hard coded to connect internally..
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sunscreen: sure you could put a web server for authentication, but why limit yourself to applets after the authentication, instead of running rdesktop normally?
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