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


Channel log from 6 September 2013   (all times are UTC)

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08:56
<svenM>
Hello
08:56
<Mava>
ola
08:57
<svenM>
Whoever remembers me from yesterday (I got the booting problems with some of our PCs after doing a release ugrade)
08:57
Just a short update on the issue and the results:
08:59
The kernel/graphics driver is not compatible to these PCs, so the advice to turn off the splash screen was awesome! Now we installed other packages for the GPU
09:00
They still look a bit fucked up (wrong resolution), but at least we got it running on all machines and now we simply need to include other drivers
09:02
So thanks to everyone who helped me yesterday!
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09:04
<Hyperbyte>
svenM, good to see you got things working. :)
09:05
<svenM>
:)
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12:48
<svenM_>
Hey, I am back
12:48
It seems that when I start a client, it just delivers the vmware graphics driver and not the nvidia driver I installed
12:49
I followed this discussion: http://comments.gmane.org/gmane.linux.terminal-server.general/30873
12:49bennabiy_away is now known as bennabiy
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13:16
<Zaphoid>
I'm having issues trying to get the screen to lock on Ubuntu 12.04 guests. Seems nothing I try can make the screen lock. Still falls asleep, though.
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13:40
<Zaphoid>
Well, editing 50-gsettings-overrides got the screen lock back, but the user can't unlock the screen with their password, so that's also a problem...
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13:57
<||cw>
I seem to recall that the screen lock expects the password to be on the client and it's not by default?
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13:57
<Zaphoid>
||cw: That seems to be one of the problems.
14:00
I am, unfortunately, not sure how to fix that.
14:01
<||cw>
I odn't recall if there's an official way, but the idea is to copy the hash from the server's shadow file to the client
14:01
<Zaphoid>
Which requires rebuilding and rebooting any time the user changes their password.
14:01
BUt it could work temporarily
14:01
I guess this is another reason for me to just use LDAP for this stuff
14:15
<||cw>
no, it requires a process in the client startup to copy the data to itself
14:16
<Zaphoid>
Interesting
14:18
Trying to find anything talking about that.
14:20
<||cw>
my recollection isn't perfect, so it may be something else I'm thinking that needed that
14:20
<Zaphoid>
Sure.
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14:38
<Zaphoid>
That does allow gnome-screensaver to lock/unlock, just don't have an automatic update for it yet, etc, etc.
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14:46
<Zaphoid>
Morning alkisg. Had a question for you on LTSP Client screen locking, if you had a moment.
14:46
<alkisg>
Hi Zaphoid, hi all
14:48
Yeah ||cw said it correctly, LDM doesn't store the password hash locally, so the local user does not have a password, so screen unlocking won't work without workarounds
14:48
<Zaphoid>
Ah, well
14:48
Figured.
14:48
<alkisg>
Either make LDM store the hash (that part can be upstreamed),
14:48
or use LDAP, NIS or anything else instead of LDM, but you'll need other things there too, e.g. open the master ssh socket...
14:49
<Zaphoid>
Only reason I was asking you specificially is I came across some old chat logs where someone said you knew how to do it, but I couldn't find where you talked about it.
14:49
Open the master ssh socket? Not sure what you mean by that...
14:49
<alkisg>
LTSP 6 will be a bit better there, as it will use libpam_sshauth
14:49
The stuff that LDM does. If you decide not to use LDM, you'd have to reimplement what it does behind the scenes.
14:50
<Zaphoid>
Ah, ok
14:50
Yes, I'd imagine so.
14:50
<alkisg>
The easiest way would be to tell ldm to store the hash
14:50
If you know a bit of C coding, it shouldn't be hard
14:50
<Zaphoid>
I've been going through some of the scripts and not seeing anything there. Would I have to rebuild ldm to do this, or would this be out of band?
14:51
<alkisg>
Modify "ssh.c", rebuild ldm, send patch upstream etc
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14:53
<Zaphoid>
I guess I'm not clear on how gnome-screensaver (or whatever screensaver) would then authenticate against the hash LDM stored.
14:53
<alkisg>
It would just check the user password
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14:53
<alkisg>
It's the same if the user tries e.g. "login" or "sudo" or "su - username" locally
14:54
All those don't work because there's no way for the user to authenticate locally
14:54
<Zaphoid>
Sure
14:54
<alkisg>
Try this for yourself, don't paste the results here: sudo grep ^$USER /etc/shadow
14:55
The hash there exists on the server but not on the ltsp client... if you copy that, then all local authentication also works
14:55
<Zaphoid>
Yes, I've proven that this morning.
14:55
Copied over specific user hashes from the host to the client.
14:55
And re-enabled gnome screensaver and that is now functional.
14:55
Lots of downsides to that, of course
14:55
<alkisg>
In fact it doesn't even have to be read from the server, it can be generated on the client when ldm gtk-greeter gets the password from the password box
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14:56
<alkisg>
If you know C programming, you can fix it in ssh.c. Otherwise there's no easy solution, you'd have to do a lot of stuff to work around it.
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14:58
<Zaphoid>
I'll ahve to take a look at that some.
14:59
This isn't critical for one of the things I want to do.
14:59
On the other half, I'll probably sidestep this and implement LDAP
14:59
Which is something I've been wanting to do for a while, anyway.
15:01
Assuming there's not another issue I'm unaware of with LDAP and LTSP
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15:35
<alkisg>
As I said, if you want the clients to use LDAP, you'd have to stop using LDM, and then reimplement some of the things LDM does. It's harder than patching ssh.c.
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15:45
<Zaphoid>
I see.
15:45
Makes a little sense
15:47
<alkisg>
It's very easy to use LDAP on the server though, and still have the clients use ssh.c to authenticate against the server (which uses LDAP)
15:48
<Zaphoid>
I thought that would be. Doesn't seem that would help the gnome-screensaver issue.
15:48
WHich would, again, require the ssh.c patching
15:49
You said the LDM code was on launchpad, right?
15:57
<alkisg>
!ltsp-source
15:57
<ltsp>
ltsp-source: at http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/files
15:57
<alkisg>
!ldm-source
15:57
<ltsp>
ldm-source: at http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ldm-trunk/files
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16:02
<Zaphoid>
Hey, fun
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18:29
<bcdonadio>
what would be the best (or most usual) solution to sync installed packages between LTSP servers of a cluster?
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18:54
<Hyperbyte>
bcdonadio, rsync? Whatever syncing method you prefer I guess.
18:55
<bennabiy>
Hey vagrantc, alkisg!
18:55
<alkisg>
Hi guys
18:56* vagrantc waves
18:56
<bcdonadio>
Hyperbyte, what would I rsync? just /usr? this way there won't be a record that the package is installed
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18:58
<Hyperbyte>
bcdonadio, I have no idea about specifics of LTSP-cluster.
19:02
<bennabiy>
I am going to try to implement the changes you said alkisg. Not sure if I can get everything in for debian support, but can at least get the basics
19:02
I have a little over an hour, unless something comes up.
19:02
<muppis>
We used to have a script which fetched a file contained list of packages needed to be installed and also contained default answers if something needed to be set during installation. Script was runned in cron.
19:03
<alkisg>
bennabiy: nice, I hope vagrantc accepts that implementation method (i.e. not a LinuxMint/ dir, but a couple of files inside the Debian/ and Ubuntu/ dirs)
19:03
<muppis>
Afterwards replaced by a meta-package for easier to maintain.
19:03
<bennabiy>
alkisg: I personally think I like the LM directory, but I do have to say, the LMDE is what throws it off
19:04
<alkisg>
Yeah you can't support 2 different distros with one single dir
19:04
<bennabiy>
I just like that it is easy at a glance to see what is mint customized and what isnt
19:04
unless you had sub dirs
19:05
<alkisg>
Or if you have only 1 script, that then in turn sources 2 other different dirs
19:06
E.g. LinuxMint/000-mint, which in turn selects if it should source UbuntuMint/* or LMDE/*. But I think that's getting it too far, I don't consider Mint a separate distro...
19:06
Just a badly designed flavor of ubuntu and debian...
19:07
<bennabiy>
Which is why I think just a couple scripts within the parent distro would work
19:07
that is more what I want... that it would work
19:08
I am just thinking about maintaining it in the future.
19:08
<alkisg>
It's just 3 scripts, it should take 10 minutes to write, 5 hours to test, and again the same after each new mint release... :)
19:10
The code isn't really the problem, it'll only be a few lines. Testing the code will need time, wherever you put the code.
19:10
<bennabiy>
yes.
19:10
<vagrantc>
so a separate plugin for the added mint support?
19:10
or set of plugins?
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19:11
<bennabiy>
question. Is there a way for launchpad to compile a ppa for me to "install" on a machine to test?
19:11
<vagrantc>
and a few small patches to existing plugins
19:11* alkisg voted for a detect_vendor patch, and 3 scripts inside Debian/ and 3 more inside Ubuntu/
19:11
<vagrantc>
alkisg: did you comment on the merge request?
19:11* bennabiy hopes the debian and ubuntu maintainers do not mind... ;)
19:11
<alkisg>
bennabiy: google for "launchpad recipes"
19:12
We already have a few of them for ltsp... you can write one to compile to your own ppa, while merging with your own code
19:12
<vagrantc>
the detect_vendor patch is a little annoying to support a broken lsb_release...
19:12
<alkisg>
vagrantc: nope, I was kinda busy to properly handle this, so I just chatted with bennabiy for a while here in irc... :)
19:13
If mint had its own ltsp packages, it could use overrides for detect_vendor
19:13
...but I don't see that happening :)
19:13
<vagrantc>
yeah, that would be better... but meh.
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19:17
<bennabiy>
can I download a sample recipe from launchpad?
19:17
basically, can I see the existing recipe, and then just add in my branch for testing?
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19:21
<alkisg>
bennabiy: here's one of mine: https://code.launchpad.net/~ts.sch.gr/+recipe/ltsp
19:21
You only want to write 2 lines for your own recipe, nothing more
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19:23
<alkisg>
...or you can just run `debuild -b -tc` locally in your box :)
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19:23
<bennabiy>
And that basically takes whatever files are in your branch, and if those exist in the trunk, use your version ?
19:24
debuild is bzr function?
19:24
<alkisg>
Nope, separate program
19:25
That recipe takes the ltsp-trunk contents, adds the debian/ packaging dir, and then builds the package
19:25
<bennabiy>
I do not have it on my system... what package installs it?
19:26
<alkisg>
`sudo apt-get build-dep ltsp` should get you all dependencies...
19:26
About the recipe, you would do the same, except that you would use your own branch instead of lp:ltsp
19:26
<bennabiy>
E: Unable to find a source package for ltsp
19:27
<alkisg>
Check your sources.list, that it has all the appropriate deb-src entries
19:27
<bennabiy>
ahh, that is the problem.
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19:31
<bennabiy>
alkisg: What if I wanted to build the ubuntu version?
19:32
or am I not thinking right?
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19:35
<TFDL>
hello there,
19:35
at our University TFDL library
19:35
-i have a successful setup ubuntu-12.04.3-alternate-i386 - 1 thinServer and 2 thinCLients (different hardwares).
19:35
-one thinClient boots successfully and working nicely (we are very happy)
19:35
-but the other thinClient failed during boot time, show a black screen after about 15 seconds.
19:35
Here is the last few messages i recorded on a video and write it down to show you, i can give me more details if need to.
19:36
"
19:36
eth0 configured at 192.168.0.21:192.168.0.1:192.168.0.1:255.255.255.0:
19:36
done.
19:36
Begin: Mounting root file system ... Begin: Running /scripts/local-top ...
19:36
Begin: Setting up nbd-client ... Negotiating ..size = 253MB bs=1024, sz265449472 bytes
19:36
[ 10.867466] ndb0: unknown partition table
19:36
done.
19:36
Begin: Running /scripts/local-premount ... done.
19:36
Begin: Running /scripts/local-bottom ... done.
19:37
done.
19:37
Begin: Running /script/init-bottom ... done.
19:37
done.
19:37
Begin: Running /scripts/init-bottom ... done
19:37
[ 14.632335] longhaul: Option "Enable" not set. Aborting.
19:37
"
19:37
Now it goes to black screen.
19:38
Sorry for a long message, i just want to give as much details as possible.
19:39
And I will just ask you for a pointer such as what to investigate, what to try, or what to understand.
19:39
Thanks so much for all the help thus far.
19:39
We are just so desperate to reuse our old computers.
19:42
<bennabiy>
!pastebin
19:42
<ltsp>
pastebin: the LTSP pastebin is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebin, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
19:42* bennabiy is not one to speak though....
19:44
<christophe_y2k>
Hello everyone, beginner question, is it possible to use ltsp without genkernel?
19:48
<||cw>
christophe_y2k: most distros just use their stock kernel. I odn't see why gentoo wouldn't be ale to
19:49
then again, gentoo does a lot of things kind backwards
19:49
<TFDL>
Hello <ltsp> I pasted my question with description here: http://pastebin.com/XCA121n1
19:50
thank you.
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19:54
<alkisg>
(10:31:59 μμ) bennabiy: alkisg: What if I wanted to build the ubuntu version? ==> you'd use the ubuntu debian/ dir instead (although nowadays it's very similar to debian)
19:55
TFDL: how much RAM does that thin client have? What graphics card? What CPU?
19:55
Also, "ltsp" is a bot, a computer program, not some human...
19:55
<christophe_y2k>
||cw: when i install gentoo i compile manually my kernel, and the ltsp overlay use genkernel, because i not understand very well genkernel, i prefere compile my kernel for my client
19:56
<TFDL>
thanks alkisg
19:57
i am getting the info right now
19:57
<bennabiy>
alkisg: So for my recipe, I would do this? ...
20:00
http://pastebin.mozilla.org/2987000
20:01
<alkisg>
bennabiy: nope, the packaging always goes in a debian/ dir
20:02
I don't know where you would find a branch with just the ubuntu packaging in launchpad, but I'm pretty sure it's somewhere out there :)
20:03
bennabiy: are you using 12.04, and plan to compile ltsp-trunk?
20:03
<bennabiy>
http://pastebin.mozilla.org/2987043
20:03
no, 13.04 equiv or deb 7.1
20:03
<alkisg>
There were some changes between those 2 versions that require configuration changes in nbd and some other places...
20:03
<TFDL>
<alkisg> RAM: 2.00 GB, Processor: VIA Nano processor U225@1300MHz 1.30 GHz, Graphic card: VIA Chrome9 HC3 IGP WDDM 1.1
20:05
<alkisg>
TFDL: did you remove all the "quiet splash" words? I think there are 4 related parameters there...
20:05
!quiet-splash
20:05
<ltsp>
quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
20:05
<alkisg>
...some more things to try: SCREEN_07=shell in lts.conf, to see if it can boot to a console,
20:05
<TFDL>
yes i did remove the params such as quiet splash handoff = 7.
20:06
<alkisg>
and if it doesn't even reach that part, ltsp.break=50-fstab in pxelinux.cfg/default, to see if it reaches the file system,
20:06
and if it doesn't even reach that, longhaul.blacklist=1, to blacklist that driver
20:06* alkisg waves goodnight to all
20:06
<bennabiy>
night alkis
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20:07
<TFDL>
ok thank you alkisg
20:07
i will try all that
20:07
thanks!
20:22
<bennabiy>
vagrantc: Would this be a fine patch to the detect_vendor() ?
20:22
http://pastebin.mozilla.org/2987117
20:25
<vagrantc>
bennabiy: you need [ ] on line
20:25
5
20:25
if [ $(lsb_release -s -c) = "debian" ]; then
20:25
should probably work, otherwise.
20:25
<bennabiy>
I thought [ and ] are nice, but not required? according to bash scripting
20:26
<vagrantc>
depends on the case
20:26
er, the situation
20:27
<bennabiy>
heh
20:31
ok... fixed that
20:32
<vagrantc>
might make some minor changes in style, but overall it should work.
20:33
<bennabiy>
If I do what alkisg suggested and put in 000-basic-configuration-mint, do I just put a test at the head which tests for a variable, and if it exists, use this plugin?
20:34
If I set a variable in detect vendor, it could pick it up for the sake of the plugin scripts, right?
20:34* vagrantc forgets
20:34
<vagrantc>
gotta head out, back later
20:35
<bennabiy>
I am about to head out as well... just thought I would get the basic framework out of the way...
20:35
thanks for everything
20:35* bennabiy waves
20:35* vagrantc waves
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20:35
<Zaphoid>
I'm having some issues with printing from guests. when I gotto printer settings, says "The system printing service doesn't seem to be available"
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