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


Channel log from 4 August 2016   (all times are UTC)

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08:47
<boospy>
Good day. We using here epoptes 5.10-1. First Question: is it possible to set some compression in vnc connection?
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09:20
<alkisg>
boospy: vnc is automatically selecting the best method
09:20
If you run it via the command line, you'll see which one it selects based on the bandwidth etc
09:32
<boospy>
alkisg: can i force it? Because it is used from teacher in school, but also for us via remote adminstrato over internet
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10:38
<alkisg>
boospy: x11vnc automatically adjusts its compression based on the bandwidth
10:39
That means that it will select the correct one over the internet, and even lower it when the internet connection is in use by others (youtube etc)
10:40
But of course VNC is never a speed monster; e.g. x2go is more efficient for remote connections
10:40
If you want to alter the x11vnc parameters, check the epoptes source code, it's shell and python, i.e. editable
10:40
Just grep for x11vnc and vncviewer in the sources
10:53
<boospy>
alkisg: thank you
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11:08
<boospy>
We have the problem that when we start eoptes over ssh -X that sometimes (but only from up to 8 Clients) when we send the local desktop to all the clients, all screens will be black, also the server, and after some seconds, this screens are freezing. The only way to stop it: Open another epopts over ssh X and stop all broadcasting. But this is only sometimes. We testet also the protocolls spice and NFS. Over NFS i can't mount the whole remotedisk, mount works
11:08
but i can't see something, so i think this is an NFSfeature. Spice is not possibel for this feature. Also x2go not. Sorry for the long text :)
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12:10
<Physikus>
quit
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12:22
<alkisg>
boospy: you run ssh -X over the Internet? That doesn't sound efficient...
12:22
Why not run x2go from the internet instead, and then broadcast the, at that point local, session?
12:24
Also, how is NFS related to VNC? One is for disk, the other for screen...
12:25
In general, if you want to broadcast a computer screen to a local network, either make sure that the screen is local (e.g. x2go or VNC to server, but not ssh -X), or use a VNC proxy
12:26
You certainly cannot broadcast your screen to 10 clients over the Internet
12:38
<boospy>
alkisg: Sorry, i will explain. The school have more then one IT-room. All clients running on Debian Vlizedlabproject (Debian8). This system has desktopvirtualissation with virtualbox. So for example there running Windows10, Windows7 and Kubuntu16.04 as VM. There is on central Debian8 the epoptes Server. This server is used in the local network over SSH -X and we use it over Internet with x2go. So my problem is i can only use epoptes at teacherclient with SSH X,
12:38
because all Systems are running in Virtualbox. The last few days it has worked fine. So think that epoptes can have a problem with sshprotocoll with more clients...
12:41
<alkisg>
boospy: I can't say I understand...
12:41
ssh -X is extremely slow
12:42
So VNC and ssh -X will be really slow
12:42
That's not something that epoptes can solve
12:42
"The last few days it has worked fine" ==> you mean even with many clients over ssh -X?!
12:43
I also can't understand why you need to use ssh -X locally, instead of x2go again
12:45
Finally, I don't understand the relation with virtualbox... do you mean that clients run debian, and then inside the user session they run virtualbox, so you're using epoptes-client from the underlying host os to broadcast the teacher screen inside windows?
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15:01
<julienfayad>
hello alkisg, I checked with the Live CD on the same machine and the sound works like a charm out of the box
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15:02
<julienfayad>
so this is definetely related to ltsp, now the question is what. My doubts are geared towards pulse
15:03
I’m wondering, can the fact that the ltsp server is a Virtual Machine running on a server with no sound device plugged cause any harm ? (since it’s ltsp pnp)
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15:59
<julienfayad>
ok, i’m running some tests to compare in between the ltsp fat client and the live cd boot.
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16:00
<julienfayad>
pulseaudio is definitely the problem here, if I try to run a simple pactl list command, on the FAT client, it returns the following error “Connection refused: connection failed”
16:01
because the pulseaudio daemon is not running
16:01
if I try to run it (i.e pulseaudio -vvv)
16:02
It failes with the error I mentionned yesterday: Failed to create secure directory (/home/{username}/.config/pulse): permission denied
16:03
I checked the ownership and permission of all folders in the path, here is what I gave:
16:03
home 755 root root
16:04
{username} 755 {username} root
16:04
.config 755 {username} {username}
16:12
that is quite weird… as {username} I’m able to create that directory
16:12
but pulse isn’t able to...
16:12
I’m wondering as which user is pulse trying to run…
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16:25
<shashi>
help
16:25
can anyone tell how check the number of clients active in ltsp
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16:31
<bennabiy>
alkisg: It seems to be the $XAUTHORITY which is not getting to the thin client which causes the menu to fail (python-xlib requires it)
16:34
<julienfayad>
shashi your best bet is to install epoptes on your ltsp server
16:34
http://www.epoptes.org/installation
16:35
unfortunately I gtg, I’ll be back in a few minutes
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18:35
<bennabiy>
alkisg: actually, python-xlib is choking on the IP address for hostname in $DISPLAY
18:36
alkisg: here is the pastebin of the error... https://paste.ec/paste/7IvpHTLk#Yh8Vts8wtrl00xMNDmy4wLl6o7rU1DB7oJDqeDRFony
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19:05
<alkisg>
bennabiy: it sounds like your xauthority contains non ascii characters... I don't think it's ltsp related
19:06
<bennabiy>
alkisg: it is interesting though that it is 192, which is the start of the IP address
19:07
I agree, it is unrelated to ltsp, per se, but if anyone else encounters it (as it happens primarily in LTSP environment) the issue is still with python-xlib
19:07
<alkisg>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc0 in position 0: ordinal not in range(128)
19:07
128 or 192?
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19:07
<alkisg>
Hmm
19:07
<bennabiy>
the range is 128, but 192 is 0xc0
19:08
<alkisg>
Yup makes sense
19:08
<bennabiy>
I almost wonder if it would work if DISPLAY contained a known hostname
19:08
<alkisg>
You can try it, it's just a xauth away...
19:09
<bennabiy>
hrm, I will have to look up the command
19:09
<alkisg>
You can also try with an ip of lower than 128 :D
19:09
E.g. 10.10.10.10...
19:11
<bennabiy>
0x0a...
19:12
that would be a line feed if I am not mistaken...
19:14
<alkisg>
You can use whatever ip suits you, for test purposes
19:14
<bennabiy>
alkisg: how would I change to hostname for xauth?
19:18
<alkisg>
bennabiy: grep the ltsp source code for xauth
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19:29
<bennabiy>
ltsp or ldm?
19:29
alkisg: ^
19:29* bennabiy waves to vagrantc
19:30
<alkisg>
bennabiy: on a thin client, run this: python -c 'from Xlib import display; d=display.Display()'
19:30
It's the easiest way to reproduce the issue you're seeing
19:30
So, report it to Xlib and wait for a fix
19:30
There's no need to test with LTSP more...
19:31
*to python xlib
19:31
<bennabiy>
great. thank you
19:31
<alkisg>
Their DISPLAY parser chokes on ip addresses
19:31
<vagrantc>
thin clients are so 90s
19:32
<alkisg>
Haha
19:44
<bennabiy>
heh
19:44
done
19:44
https://github.com/python-xlib/python-xlib/issues/53
19:46
<alkisg>
Nice. I believe they'll also need your $DISPLAY and contents of .Xauthority (a clean one, rm it before logging in)
19:50
<bennabiy>
ok, will do
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20:32
<fcord>
Hi
20:33
my ltsp clients only recognize up to 1GB memory
20:38
?
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20:43
<georgewendlow>
sa
20:43
hello hi amınakoduklarım
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