IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 8 September 2012   (all times are UTC)

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04:39
<ltspuser_39>
hi there, anyone around tonight
04:39
I'm frustrated after hours of GOOGLing
04:40
<Pecker>
question is?
04:40
<ltspuser_39>
so I built an LTSP server, and have a client workstation that PXE boots from it. It had been working fine... and then I changed the "login screen" to a different graphic, and now the client can't ever login again
04:40
it boots up fine and "looks" like it's going to login but never actually gets the desktop
04:41
I tried changing the login screen back but it still does the same thing
04:41
so I can't figure out what it is
04:41
Xwindows is running on the server, checked that
04:42
<alkisg>
What do you mean "changed the login screen to a different graphic"? Are you still using LDM, or did you switch to e.g. GDM?
04:43
<ltspuser_39>
no still using LDM as far as I know... Just changed the login screen graphic for the PXE boot client
04:43
so it has the school logo on it
04:43
<alkisg>
Which distro/version?
04:43
<ltspuser_39>
Centos 6
04:43
<alkisg>
Ah, ok, no idea there
04:43
<ltspuser_39>
drats
04:44
anyone else around that might know something? I really don't want to blow it away and start over
04:45
<Pecker>
sudo ltsp-update-image ?
04:45
just to be sure
04:47
<ltspuser_39>
ok running that now
04:47
what does that do?
04:47
<Pecker>
it updates the image clients boot from
04:47
<ltspuser_39>
ok that's what I thought
04:47
<Pecker>
some setting changes require this image to be updated
04:48
<ltspuser_39>
ahhhh
04:48
<Pecker>
which ones requires it though can be crazy to figure out it seems
04:48
<ltspuser_39>
if I change the IP address of the LTPS server, will I need to run this script again?
04:48
the server is running in my house (test/config) but will be moved to the school soon for production (grade school)
04:49
<alkisg>
Does Centos use NBD or NFS?
04:49
<Pecker>
ip as in the net interface or the ltsp interface (assuming 2 interface setup)
04:49
<ltspuser_39>
NFS I believe
04:50
I have to run single interface mode
04:50
I wish I could run the split mode but the way the network is configured in the school, that won't fly
04:50
<Pecker>
i dont think youd have to update the image..but if something doesnt work it doesnt hurt to update it
04:50
<ltspuser_39>
they have 5 and 8-port hubs in the classrooms that these LTSP terminals will share with other computers
04:51
so while I would love to isolate the network for these terminals, that won't happen
04:52
bummer...that didn't work. I rebooted the PXE client and still having the same thing
04:52
you sign in with a valid name, it looks like it's going to sign in and then pops back to the login screen again
04:53
<Pecker>
weird
04:53
although i seem to have that with ubntu 10.04
04:53
<ltspuser_39>
if you enter the wrong ID/Pass you get a different error and then it asks you to login again
04:53
it's not doing that
04:53
<Pecker>
after a few tries it finally logs in
04:53
<ltspuser_39>
I've tried it 4 times
04:53
<Pecker>
yeah for me if it still wont login then something is up
04:53
<alkisg>
ltspuser_39: on the server, do you get a successful authentication attempt at /ver/log/auth.log?
04:53
<ltspuser_39>
hmm let me look
04:54
<Pecker>
should you have to update the ssh keys for a login screen change?
04:54
<ltspuser_39>
there isn't an auth.log
04:54
I'm not using SSH
04:55
<alkisg>
OK, centos is too different to be try to be helpful without actually using it :)
04:55
<Pecker>
yeah same felling here
04:55
<ltspuser_39>
rats
04:55
that's the frustration I have with the different distributions
04:55
in the business world, everyone uses Centos/RH
04:55
for servers
04:56
so that's what I know
04:56
Ubuntu is too different
04:56
as a volunteer, I have to support this once it's live
04:56
can't go with something I don't know really well
04:56
:*
04:56
:(
04:57
anyone else here familiar with LTSP on Fedora/Centos
04:59
any of you guys integrate LTSP into AD?
05:00
I'm hoping to configure groups in Windows AD that provide access rights to the LTSP server
05:00
<alkisg>
http://w3techs.com/technologies/history_details/os-linux => here it says debian is first, centos second...
05:01* alkisg doesn't care about distros, he was just suddened to hear that "in the business world, everyone uses Centos/RH"
05:01
<Pecker>
rofl
05:03
<alkisg>
Fedora does have 389 for AD, and there's also likewise open... haven't used any of those
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06:21
<ltspuser_80>
I was on here before but had to reboot... Anyone around that knows LTSP on Centos/RH?
06:33
anyone around?
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06:50
<ltspuser_80>
hi there
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11:05
<knipwim>
!seen nubae
11:05
<ltsp>
nubae was last seen in #ltsp 32 weeks, 4 days, 14 hours, 48 minutes, and 1 second ago: <Nubae> i shall document my troubles
11:39
<knipwim>
anyone else have experience with VIA Chrome9 video?
11:54
<gvy>
IIRC only earlier ones
11:55
like the one found with via c7
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11:56
<markit>
hi ppl :)
11:57
hi alkisg :) I've added users so far with adduser and not including them in secondary groups "dialout,cdrom,floppy,plugdev,scanner,lpadmin,sambashare", will it be an issue?
11:57
better fix asap?
12:06
<gvy>
do they need the devices/resources that these groups enable access to?
12:07
<alkisg>
markit: http://koeritz.org/docs/base-passwd/users-and-groups.html
12:08
<markit>
alkisg: yes, I know they are needed to access resources, but with thin client everythign went ok neverless (i.e. access usb key in teh client)
12:08
so wondering if are really needed for students, and if with FAT clients things change
12:13
in addition I see that don't belong to audio group
12:14
gvy: is needed to access or modify? i.e. without belong to cdrom they can still play a cdrom, as far as I can see... maybe can't burn a cd
12:16
<gvy>
markit, depends on device permissions -- in some cases a group membership might be needed to access for read either
12:17
the rule of thumb is: don't fix what ain't broken ;-)
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12:30
<pritesh>
can anyone help for installing the openthinclient server
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12:35
<alkisg>
markit: each of those groups is needed for a different thing, you can't have a general answer that covers all of them. E.g. `ls -lha /dev | grep dialout` will show you which devices this group can access directly
12:35
pritesh: what is the "openthinclient server"?
12:35
<markit>
alkisg: ah, I see, interesting the grep thing on /dev, but what do you do when you add an user?
12:35
do you add a student to the "ubuntu default" groups?
12:36
<alkisg>
markit: only the groups we want them to have access to :)
12:36
So, e.g. sambashare, but not cdrom...
12:36
<markit>
oh
12:37
<pritesh>
alkisg look this http://openthinclient.org
12:37
<alkisg>
pritesh: is that related to LTSP at all? Check www.ltsp.org
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13:02
<Hyperbyte>
alkisg, hi. :)
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13:16
<alkisg>
hi Hyperbyte
13:19
<knipwim>
gvy: you got any working experience with a VIA Technologies, Inc. CN896/VN896/P4M900 [Chrome 9 HC]?
13:20
by default, X is not starting at all
13:20
<gvy>
knipwim, lemme look in archives...
13:23
knipwim, there was a success report last March: http://www.altlinux.org/LTSP/beta (in Russian but ids should be readable)
13:23
it's ALT Linux
13:24
I'd try to get hold of Xorg.0.log to pass it to the xorg maintainers in charge
13:28
<knipwim>
nice, there is hope for me yet
13:34
<gvy>
if you can boot a livecd there here's one using roughly the same codebase: http://ftp.linux.kiev.ua/pub/Linux/ALT/people/mike/iso/mkimage-profiles/live-icewm-20120305-i586.iso
13:34
not sure wrt the driver set though
13:34
<knipwim>
yeah, i'm downloading the tested icewm now, see what's on there
13:52
<alkisg>
knipwim: with some via chrome I had to use 'nomodeset', but I don't remember the model
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14:02
<knipwim>
well, it's starting with the openchrome driver < 0.3
14:03
the ideal way to set resolution is through XRANDR lts.conf options?
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14:10
<alkisg>
xrandr is fine, it allows changing the resolution later on
14:10
The xorg "preferred mode" is better, as it causes less flicker, but we don't have support for that
14:11
And, X_HORZSYNC/vertrefresh are fine too, for setting the max==auto res...
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14:47
<PhoenixSTF>
When you have a network of about 1000 Fat-Clients, is it better to have servers on each switch(s) or just put fiber-optics from the Data-center to the switch
14:49
<Hyperbyte>
PhoenixSTF, network latency added by switches is disregardable
14:49
<PhoenixSTF>
Hyperbyte, That I know, I am more worried on line capacity
14:50
<Hyperbyte>
Right, you meant having one fiber optic pipe for -all- your servers?
14:50
<PhoenixSTF>
Hyperbyte, yes
14:50
<Hyperbyte>
Then my next question is, how much capacity does your fiber optic have?
14:50
<PhoenixSTF>
I think 10Gbps
14:51
i know 1 Gbps wont cut it
14:51
it would take too long to load every client at the same time
14:53
right?
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15:00
<Hyperbyte>
Fat or thin?
15:00
If thin, measure bandwith usage of average use and do the math
15:00
If fat, measure bandwith usage at boot and do the math...
15:02
<PhoenixSTF>
thanks
15:03
<alkisg>
How many clients per switch?
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15:12
<alkisg>
Wow, nice server... http://www.phoronix.com/scan.php?page=article&item=compulab_intensepc&num=2 ...or (very) fat client...
15:14
<knipwim>
a bit of a noob question, xrandr says maximum size 1024x768, is that a video card issue, a driver issue or a cable issue?
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15:31
<alkisg>
knipwim: pastebin /var/log/Xorg.7.log
15:32
It's probably a driver issue, that can't read the monitor EDID info, assuming it does support more than 1024x768
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16:53
<knipwim>
alkisg: https://gist.github.com/3677100
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17:44
<knipwim>
the binary VIA drivers are all very old
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18:04
<alkisg>
knipwim: [ 41.238] (II) CHROME(0): <default monitor>: Using default hsync range of 31.50-48.00 kHz ==> you might have to use X_HORZSYNC / X_VERTREFRESH
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18:27
<knipwim>
alkisg: hmm, that didn't work exactly, at least not with the values i gave
18:28
but i can give the desired virtual size
18:28
only i get a small port onto it, i guess 1024x768
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23:36
<ltspuser_81>
hello
23:37
can I change my nick here, or do I need a fixed account for that (currently as guest)
23:42
<stgraber>
ltspuser_81: type /nick <new nick>
23:43ltspuser_81 is now known as Dutch_master
23:43
<Dutch_master>
gret, y\hx!
23:43
right, thick fingers :(
23:43
thx!
23:44
<stgraber>
np
23:45
<Dutch_master>
Is there anyone of the LTSP website online perhaps?
23:45
When I tried to get to the success stories, I can't
23:46
it wants to show a map, but that doesn't show
23:46
so I can't select any story, as I can't see them
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