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


Channel log from 28 September 2017   (all times are UTC)

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02:05
<mmarconm>
Hey =)
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
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.
18:12
<alkisg>
absorto: ldm uses ltsp scripts etc
18:13
You don't have to netboot the client, but you would need ltsp scripts for it to function properly
18:13
Also note that ldm is unrelated to X -query
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?
18:17
also, how would I query the server? I understand not thru X -query, because of the ssh. But then: how?
18:17
<alkisg>
absorto: ideally you would be. However the code doesn't cope with that.
18:17
LDM gets the configuration for the server from ltsp
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
18:18
Both managed by ltsp
18:18
<absorto>
I see.
18:18
<alkisg>
What's the actual use case?
18:18
<absorto>
Well, so maybe I'll just use some other display manager.
18:18
<alkisg>
Maybe you're missing some better way to achive what you want?
18:19
<absorto>
alkisg: ait, here's the use case
18:19
We have a nice machine, 24GB ram, many cores. It would be nice to use that as a host for graphical sessions.
18:20
Clients are a mix of macs, and pcs, some with windows, some with debian.
18:20
<alkisg>
On average, what are the client cpu/ram specs?
18:20
<absorto>
I would like to go X -query main-host at a pc, and run my graphical session there.
18:21
<alkisg>
Maybe you wouldn't like the performance of that :)
18:21
<absorto>
clients are not that old, say 4Gb ram each
18:21
<alkisg>
That's why I'm asking
18:21
Then you *surely* wouldn't like it
18:21
<absorto>
alkisg: oh I'm sure I'd like it!
18:21
<alkisg>
Unless you have 10 gbps network?
18:21
<absorto>
well... I used to work that way together with around 12 colleagues a few years ago
18:21
I don't even think we had gigabit
18:21
<alkisg>
!thin-clients-bandwidth
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/
18:21
<absorto>
it was fine
18:21
<alkisg>
!flash
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
18:22
<absorto>
just no videos, but who cares?
18:22
<alkisg>
Well users want browsing nowadays
18:22
<absorto>
yeah, flash is gone anyway
18:22
not at this shop
18:22
<alkisg>
Flash is an example
18:22
<absorto>
if they wanna watch videos, let them use their local stack
18:22
<alkisg>
All moving content needs more than 1 gbps
18:22
<absorto>
but for work related stuff, I am very happy to work at the large machine
18:23
alkisg: well, I'm sure we had 100mbit and it was fine
18:23
and it was about a dozen of us
18:23
and the host machine had around 1gb ram
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"
18:23
<absorto>
we used interactive gnome sessions with mozilla and openoffice and were very happy
18:23
<alkisg>
absorto: your remarks are nice, but I run ltsp in 1000+ schools, so you can't really convince me
18:23
<absorto>
alkisg: that's impressive
18:23
<alkisg>
I've done a whole lot of related benchmarks
18:23
<absorto>
okay
18:24
<alkisg>
I'm trying to help you; if you're sure of what your needs are, we can move on
18:24
So, X -query is easy to configure
18:24
You're worried about its security?
18:24
<absorto>
not worried, we're ina private network well behind a nice firewall
18:24
<alkisg>
Why were you looking at ldm then?
18:24
And btw, why not netboot the clients?
18:25
If your network is good enough for thin clients, it's surely enough to netboot them
18:25
And it saves a whole lot of maintenance
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.
18:25
<alkisg>
X -query sends the password in plaintext over the lan
18:25
If someone has a sniffer, he may get it
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?
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
18:26
<absorto>
fzimper: I will run an X server on my pcs, just to display apps running on the host.
18:26
<alkisg>
It's even *easier* than configuring ldm in their laptops
18:26
It's just "F12 = boot from net"
18:27
E.g suppose someone has a windows laptop, he can use even that
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.
18:27
<alkisg>
You can use VMs
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
18:28
<alkisg>
But ok, if you made up your mind about that, let's move on
18:28
<absorto>
fzimper: yes yes, that's what's on my mind
18:28
<alkisg>
Have you seen x2go btw?
18:28
<absorto>
no, x2go? let's see
18:29
oh this is nice
18:31
wow, x2go seems like a good fit! thanks!
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.
18:31
Though the data arrives at the server. Often many times :-(
18:32
I can see in the code that it should display a confirmation or an error message but that doesn't appear
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"
18:32
Ah, let me see about that...
18:32
<fzimper>
Right, but what about all those duplicate entries?
18:32
<alkisg>
The teacher removes the entries before pressing accept
18:33
<fzimper>
It works quite fine with older kids, but the younger ones tend to be a bit less patient...
18:33
So they click OK often
18:33
So that is a known issue then?
18:34
<alkisg>
fzimper: no, we never had it in the greek version
18:34
<fzimper>
The dialogs in signup.py starting at line 224 do not appear
18:35
<alkisg>
And I didn't test the english version too much wrt sign up process
18:35
<fzimper>
ok. Do you want me to raise a bug?
18:35
<alkisg>
Yes please
18:35
<fzimper>
Will do.
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?
18:39
<fzimper>
correct
18:39
<alkisg>
Sounds like a bug all right... something prevents the dialog from closing
18:43
<fzimper>
Would it be possible to see the sequence of xcreens in Greek somewhere?
18:43
xcreens = screens
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
18:45
Other than that, you could just install sch-scripts ;)
18:50
<fzimper>
What happens after that last screenshot? That's what's missing
18:51
<alkisg>
They get an ok dialog over that dialog, and then both close
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.
19:39
<alkisg>
fzimper: if you make it msg = "Your request was successfully delivered for review."
19:39
does it work then?
19:39
maybe we didn't import the translations function at that point...
19:47
<fzimper>
Trying. Got a funny error now
19:47
NameError: global name '_' is not defined
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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