IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 28 September 2017 (all times are UTC)
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| 02:05 | <mmarconm> Hey =)
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| 02:06 | alkisg, finaly i got to install ldap and ltsp together =) everything working fine
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| 05:29 | <quinox> \o/
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| 11:19 | <enlaces> hola
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| 18:06 | <absorto> hi all! Do you know how one can use just the ldm display manager? I've done X -query host before, just dunno how to query the ldm with the SSH stuff
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| 18:07 | <||cw> absorto: not sure what you mean
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| 18:12 | <absorto> I mean I don't want to install a ltsp server, I just want to use the ldm to do remote sessions on my fat clients thru ssh.
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| 18:12 | <alkisg> absorto: ldm uses ltsp scripts etc
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| 18:13 | You don't have to netboot the client, but you would need ltsp scripts for it to function properly
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| 18:13 | Also note that ldm is unrelated to X -query
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| 18:16 | <absorto> however I see there's a ldm and ldm-server packages on my plain debian. So probably I can install those and setup just the display manager, right?
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| 18:17 | also, how would I query the server? I understand not thru X -query, because of the ssh. But then: how?
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| 18:17 | <alkisg> absorto: ideally you would be. However the code doesn't cope with that.
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| 18:17 | LDM gets the configuration for the server from ltsp
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| 18:18 | <absorto> I see.
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| 18:18 | <alkisg> It's either "server" in /etc/hosts, or LDM_SERVER from lts.conf
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| 18:18 | Both managed by ltsp
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| 18:18 | <absorto> I see.
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| 18:18 | <alkisg> What's the actual use case?
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| 18:18 | <absorto> Well, so maybe I'll just use some other display manager.
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| 18:18 | <alkisg> Maybe you're missing some better way to achive what you want?
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| 18:19 | <absorto> alkisg: ait, here's the use case
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| 18:19 | We have a nice machine, 24GB ram, many cores. It would be nice to use that as a host for graphical sessions.
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| 18:20 | Clients are a mix of macs, and pcs, some with windows, some with debian.
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| 18:20 | <alkisg> On average, what are the client cpu/ram specs?
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| 18:20 | <absorto> I would like to go X -query main-host at a pc, and run my graphical session there.
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| 18:21 | <alkisg> Maybe you wouldn't like the performance of that :)
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| 18:21 | <absorto> clients are not that old, say 4Gb ram each
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| 18:21 | <alkisg> That's why I'm asking
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| 18:21 | Then you *surely* wouldn't like it
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| 18:21 | <absorto> alkisg: oh I'm sure I'd like it!
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| 18:21 | <alkisg> Unless you have 10 gbps network?
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| 18:21 | <absorto> well... I used to work that way together with around 12 colleagues a few years ago
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| 18:21 | I don't even think we had gigabit
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| 18:21 | <alkisg> !thin-clients-bandwidth
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| 18:21 | <ltsp> thin-clients-bandwidth: A small explanation why thin clients can't perform well with video, lots of screen updates etc: https://sourceforge.net/p/ltsp/mailman/message/35694699/
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| 18:21 | <absorto> it was fine
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| 18:21 | <alkisg> !flash
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| 18:21 | <ltsp> flash: Yes, flash sucks. An HD full screen 30 fps video needs 2.5 Gbps bandwidth (1920×1080×4×30)! Make sure you have LDM_DIRECTX=True in your lts.conf file, or if it's just youtube you're after, try some flash replacing plugin like http://linterna-magica.nongnu.org
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| 18:22 | <absorto> just no videos, but who cares?
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| 18:22 | <alkisg> Well users want browsing nowadays
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| 18:22 | <absorto> yeah, flash is gone anyway
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| 18:22 | not at this shop
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| 18:22 | <alkisg> Flash is an example
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| 18:22 | <absorto> if they wanna watch videos, let them use their local stack
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| 18:22 | <alkisg> All moving content needs more than 1 gbps
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| 18:22 | <absorto> but for work related stuff, I am very happy to work at the large machine
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| 18:23 | alkisg: well, I'm sure we had 100mbit and it was fine
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| 18:23 | and it was about a dozen of us
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| 18:23 | and the host machine had around 1gb ram
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| 18:23 | <alkisg> So I think it would work best if you used "ltsp fat clients with remoteapps for specific apps that you want to run on the server"
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| 18:23 | <absorto> we used interactive gnome sessions with mozilla and openoffice and were very happy
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| 18:23 | <alkisg> absorto: your remarks are nice, but I run ltsp in 1000+ schools, so you can't really convince me
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| 18:23 | <absorto> alkisg: that's impressive
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| 18:23 | <alkisg> I've done a whole lot of related benchmarks
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| 18:23 | <absorto> okay
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| 18:24 | <alkisg> I'm trying to help you; if you're sure of what your needs are, we can move on
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| 18:24 | So, X -query is easy to configure
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| 18:24 | You're worried about its security?
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| 18:24 | <absorto> not worried, we're ina private network well behind a nice firewall
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| 18:24 | <alkisg> Why were you looking at ldm then?
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| 18:24 | And btw, why not netboot the clients?
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| 18:25 | If your network is good enough for thin clients, it's surely enough to netboot them
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| 18:25 | And it saves a whole lot of maintenance
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| 18:25 | <absorto> I thought it would be nice to do remote graphical sessions too. But if it cannot be done for security reasons, well, then just locally.
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| 18:25 | <alkisg> X -query sends the password in plaintext over the lan
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| 18:25 | If someone has a sniffer, he may get it
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| 18:25 | <fzimper> absorto, do you want to run applications on your server while showing the GUI on your PCs? Why not run an X Server on your PCs?
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| 18:25 | <absorto> alkisg: well, some computers are laptops, and some are owned by the users. Netbooting those wolud be troublesome. Besides, this whole deal will be opt-in.
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| 18:26 | <alkisg> absorto: we have a lot of teachers here that just netboot their laptops whenever they want
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| 18:26 | <absorto> fzimper: I will run an X server on my pcs, just to display apps running on the host.
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| 18:26 | <alkisg> It's even *easier* than configuring ldm in their laptops
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| 18:26 | It's just "F12 = boot from net"
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| 18:27 | E.g suppose someone has a windows laptop, he can use even that
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| 18:27 | <absorto> Okay, yes, that's fine. But this host also coordinates a cluster, so I don't want to mess with that. So installing ltsp on it is out of the question.
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| 18:27 | <alkisg> You can use VMs
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| 18:27 | <fzimper> For your Apple PCs XQuartz might be an option, for Windows maybe Xming or Exceed. For Linux, well it's running X anyway
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| 18:28 | <alkisg> But ok, if you made up your mind about that, let's move on
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| 18:28 | <absorto> fzimper: yes yes, that's what's on my mind
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| 18:28 | <alkisg> Have you seen x2go btw?
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| 18:28 | <absorto> no, x2go? let's see
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| 18:29 | oh this is nice
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| 18:31 | wow, x2go seems like a good fit! thanks!
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| 18:31 | <fzimper> Can I jump in with a question about LTSP-manager? When I open registration for new students, it basically works. Students can register, but they don't see anything when they click on OK after entering their details.
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| 18:31 | Though the data arrives at the server. Often many times :-(
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| 18:32 | I can see in the code that it should display a confirmation or an error message but that doesn't appear
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| 18:32 | <alkisg> fzimper: they're not supposed to see anything; at that point, the teacher clicks "accept" and tells the students "go ahead and login now"
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| 18:32 | Ah, let me see about that...
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| 18:32 | <fzimper> Right, but what about all those duplicate entries?
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| 18:32 | <alkisg> The teacher removes the entries before pressing accept
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| 18:33 | <fzimper> It works quite fine with older kids, but the younger ones tend to be a bit less patient...
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| 18:33 | So they click OK often
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| 18:33 | So that is a known issue then?
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| 18:34 | <alkisg> fzimper: no, we never had it in the greek version
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| 18:34 | <fzimper> The dialogs in signup.py starting at line 224 do not appear
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| 18:35 | <alkisg> And I didn't test the english version too much wrt sign up process
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| 18:35 | <fzimper> ok. Do you want me to raise a bug?
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| 18:35 | <alkisg> Yes please
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| 18:35 | <fzimper> Will do.
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| 18:36 | <alkisg> fzimper: so the student dialog doesn't go away when they press ok, and so they're able to press ok many times?
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| 18:39 | <fzimper> correct
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| 18:39 | <alkisg> Sounds like a bug all right... something prevents the dialog from closing
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| 18:43 | <fzimper> Would it be possible to see the sequence of xcreens in Greek somewhere?
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| 18:43 | xcreens = screens
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| 18:45 | <alkisg> fzimper: try google translate on this: http://ts.sch.gr/wiki/Linux/sch-scripts/%CE%A7%CF%81%CE%AE%CF%83%CF%84%CE%B5%CF%82/%CE%94%CE%B7%CE%BC%CE%B9%CE%BF%CF%85%CF%81%CE%B3%CE%AF%CE%B1_%CF%87%CF%81%CE%B7%CF%83%CF%84%CF%8E%CE%BD#.CE.91.CE.B9.CF.84.CE.AE.CF.83.CE.B5.CE.B9.CF.82_.CE.B5.CE.B3.CE.B3.CF.81.CE.B1.CF.86.CF.8E.CE.BD_.CE.BD.CE.AD.CF.89.CE.BD_.CF.87.CF.81.CE.B7.CF.83.CF.84.CF.8E.CE.BD
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| 18:45 | Other than that, you could just install sch-scripts ;)
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| 18:50 | <fzimper> What happens after that last screenshot? That's what's missing
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| 18:51 | <alkisg> They get an ok dialog over that dialog, and then both close
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| 18:56 | <fzimper> That OK dialog is what I've never seen
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| 19:30 | <fzimper> The line 'msg = _("Your request was successfully delivered for review.")' is failing.
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| 19:39 | <alkisg> fzimper: if you make it msg = "Your request was successfully delivered for review."
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| 19:39 | does it work then?
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| 19:39 | maybe we didn't import the translations function at that point...
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| 19:47 | <fzimper> Trying. Got a funny error now
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| 19:47 | NameError: global name '_' is not defined
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| 19:53 | That is correct but extremely weird, in my opinion. Will look at it another day
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| 20:39 | <markit> hi alkisg, I'm away from the server, but this morning a teacher complained that when she started epoptes and "broadcast" his video content, epoptes crashed. Is an 12.04 to 16.04 installation upgrade, with greek repo, but as far as you remember, could some old epoptes config be a possible problem?
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