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

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Channel log from 13 September 2020 (all times are UTC)

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14:06	<alkisg> markit, what's the output of `cupsctl` on the server? It should say _share_printers=1
16:11	eu^18317118519 has joined IRC (eu^18317118519!b7abb913@183.171.185.19)
16:11	<eu^18317118519> Hai
16:12	etc/ltsp/ltsp.conf
16:12	eu^18317118519 is now known as Ji
16:13	<Ji> Hai
16:13	Anybody available
16:13	Hai
16:14	I have some issues in ltsp setup Ubuntu 20.04 LTS
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16:36	markit1 has joined IRC (markit1!526a747d@host-82-106-116-125.business.telecomitalia.it)
16:36	<alkisg> Hey markit1, I was about to go out, do you need something before I go?
16:36	<markit1> hi alkisg, you were right, I forgot to set the server global printer sharing, my bad!
16:36	I've a new problem for you
16:37	<alkisg> Great, anything still not working? Shoot
16:37	<markit1> I've the "broadcast the screen" that works only for some seconds, then the "old" error on clients "unable to connect to socket: connection refused 111"
16:38	<alkisg> You're on KDE withOUT wayland, right?
16:38	And it works for some seconds, and THEN it stops working?
16:38	<markit1> 24 clients, I'm just testing, no one logged in, shared the screen, palyed for 1 - 2 minutes moving windows on the server and seeing it with a little delay on all clients, then the login screen returned and if I try to share again, that error
16:39	yes, kde with xwindow
16:39	<alkisg> Can I see?
16:39	!vnc-edide
16:39	<ltspbot> vnc-edide: To share your screen with me, open Epoptes → Help menu → Remote support → Host: srv1-dide.ioa.sch.gr, and click the Connect button
16:39	<markit1> (btw, would love to make apache or other solution work for http boot,)
16:41	<alkisg> markit1: can i install virtualbox, to test http?
16:41	to have a vm client
16:41	<markit1> ok
16:41	but the adsl is slow, 7mbs
16:43	btw, I use qemu/kvm :) usually
16:44	<alkisg> Hehe OK, I prefer virtualbox because it doesn't need a bridge
16:45	<markit1> I've a bond on client side
16:47	vagrantc has joined IRC (vagrantc!~vagrant@unaffiliated/vagrantc)
16:48	<alkisg> markit1: haha it's too fast
16:48	Can you stop it while ipxe shows up?
16:48	right ctrl + p
16:48	for pause
16:52	sed 's,ltsp/ltsp.ipxe,192.168.67.1:/&,' ltsp-dnsmasq.conf
16:55	sed 's,ltsp/ltsp.ipxe,http://192.168.67.1/&,' -i ltsp-dnsmasq.conf
16:55	markit1: try rebooting the clients
16:56	To see if they work with http
16:56	Hmm I hope python can serve to multiple clients :D
16:56	Otherwise you need a better web server than python3 -m http.server :D
16:57	<markit1> Working! But my problem was with python3 server on port 8000 ok, but with apache, same port, error
16:57	<alkisg> That's just a problem of apache configuration then, not ltsp
16:57	Do you want port 8000 or 80?
16:57	<markit1> I would prefer 8000 so if I need to provide http pages from the server, I'm still ok with apache
16:58	I created a "site" for port 8000, enabled in apache etc.
16:58	<alkisg> Then you would need to run two apache instances, one for 8000 and one for 80, but ok
16:58	<markit1> ops
16:59	I thought was like port 80 and 443... just an apache instance
16:59	<alkisg> possibly
16:59	I don't use apache much
16:59	<markit1> by the way the problem more urgent is that the screen sharing crashes
16:59	<alkisg> What I mean is that since you'll be using apache for both ltsp and not ltsp, why not just use 80
16:59	<markit1> oh, if you have a different solution like python3 httpserver that works fine, I'm ok with that
16:59	oh, right, I'm dumb
16:59	<alkisg> You can run python3 -m http.server and use port 8000, no problem there
17:00	<markit1> I thought you have to choose an exclusive port for the boot
17:00	<alkisg> OK let's see about the screen broadcasting
17:00	No it's just a web page, nothing exclusive about it
17:00	<markit1> I mean, http port 80 on the server would have provided the http page and not the boot
17:00	<alkisg> And it's in a subdir, so it doesn't conflict with anything
17:02	<markit1> [xcb] Unknown sequence number while processing queue[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
17:02	[xcb] Aborting, sorry about that.x11vnc: ../../src/xcb_io.c:260: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
17:03	<alkisg> OK let's google these...
17:10	markit1: it seems that x11vnc doesn't like kde
17:10	<markit1> great :(
17:12	<alkisg> Greek schools ppa. Don't leave home without it :P
17:12	socat is broken in 20.04
17:12	In the ppa I have a fixed version
17:12	<vagrantc> ouch
17:12	<alkisg> I don't think it matters, but it fixes the epoptes terminal
17:12	<markit1> damn, my installation scripts should always add that ppa! :((((
17:13	* alkisg waves to vagrantc
17:17	<alkisg> markit, so that I don't lose my evening walk, try these things:
17:17	['x11vnc', '-noshm', '-nopw', '-quiet', '-viewonly', '-shared',
17:17	'-forever', '-nolookup', '-24to32', '-threads', '-rfbport',
17:17	str(self.vncserver_port), '-rfbauth', pwdfile])
17:17	You run x11vnc with these parameters in one pc
17:18	then you connect to that x11vnc server from another pc, using your tightvnc viewer, and see if you can make it crash without epoptes,
17:18	then, you play with the parameters to see if you can find a parameter that does not crash it,
17:18	or you install `xvnc4viewer` and uninstall `xtigervnc-viewer`, and see if it works OK with xvnc4viewer
17:19	<markit1> ok, could you put the epoptes file with the original config?
17:19	<alkisg> It's with the original config
17:19	I already undone the change
17:20	<markit1> perfect, thanks a lot, I've to leave too, I will try at home in my vm lab http boot and this vnc stuff, thanks!
17:20	<alkisg> OK! See you another time! :)
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19:06	<alkisg> markit, ah, so if you had added the ppa before installing epoptes, then you'd have had installed xvnc4viewer instead of tigervnc viewer, which might not have this xorg issue
19:07	The realvnc.com client, and the xvnc4viewer (which is realvnc from 2005), both work fine; unfortunately the other open source vnc implementations all have issues...
19:08	Unfortunately xvnc4viewer was removed from debian, while it still works better than all the alternatives...
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