IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 24 February 2016 (all times are UTC)
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| 09:06 | <user^srv-gym-pan> οκ αλλαξα καρτα γραφικων
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| 09:06 | εβαλα μια nvidia
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| 09:07 | φαινεται να μην εχει προβλημα τωρα
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| 09:40 | <cyberorg> alkisg_away, hi, updated to latest epoptes, however "assist" only works once, have to restart epoptes for it to work with another client
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| 11:08 | <vsuojanen> stumped maldridge the tftp-hpa client should receive that, at least first on the same tftp daemon server. then I would check why clients don't boot. i find it's very common problem to get dhcp and tftp timeouts solved.
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| 13:48 | alkisg_away is now known as alkisg | |
| 13:50 | <alkisg> cyberorg: isn't your last patch the same as reverting your previous patch?
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| 13:51 | We already had an "else" clause, for "# The rest of the viewers, like tightvnc"
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| 13:52 | (hello to you too btw!)
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| 13:52 | <cyberorg> alkisg, /usr/bin/vncviewer -> /etc/alternatives/vncviewer -> /usr/bin/vncviewer-tigervnc
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| 13:52 | by default, so we look for /usr/bin/vncviewer-tightvnc
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| 13:53 | unless epoptes can get new port on every assist request
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| 13:53 | <alkisg> cyberorg: I get that, but it was the last option "else" there
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| 13:53 | So if we revert the code for tigervnc, it will work fine with tightvnc
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| 13:54 | The only thing that would be needed, is for the packaging to pull tightvnc...
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| 13:54 | In debian-terminology, epoptes = > Depends: tightvnc
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| 13:55 | <cyberorg> alkisg, no it will still need the new patch so epoptes does not try to launch vncviewer(from tigervnc)
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| 13:55 | <alkisg> cyberorg: we have 3 cases:
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| 13:56 | 1) run tigervnc
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| 13:56 | as vncviewer
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| 13:56 | 2) run tightvnc as vncviewer - 5500
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| 13:56 | 3) fall back to "else" and run vncviewer - 5500
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| 13:56 | How is (2) different from (3)? That's what I'm asking
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| 13:56 | Your previous patch added (1)
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| 13:57 | Now we can delete (1), sure, but do we need to add (2)? It's the same as (3)
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| 13:58 | <cyberorg> earlier without tigervnc patch, epoptes tried to run vncviewer - 5500, which failed as vncviewer by default comes from tigervnc
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| 13:58 | now when run as tigervnc it fails as -listen does not handle multiple connections
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| 13:58 | <alkisg> I get that part
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| 13:59 | Now you want to depend on tightvnc, right?
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| 13:59 | That's a packaging change
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| 13:59 | In upstream, we only need to revert the previous patch, correct? https://launchpadlibrarian.net/227755743/epoptes-tigervnc-vncviewer-all-rpm-distro.patch
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| 13:59 | If you do the packaging change _and_ we revert the previous patch, doesn't it work fine?
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| 14:00 | <cyberorg> hold on a sec :)
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| 14:00 | <alkisg> In Debian I would do it this way:
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| 14:01 | I would keep the upstream as it is _now_
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| 14:01 | And I would Depend: tightvnc | tigervnc
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| 14:01 | That would pull tighvnc by default, which would work because of the "else" clause
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| 14:01 | And if someone explicitly wanted to install tigervnc, that would make it work only for one remote assist (until it's fixed)
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| 14:02 | It wouldn't be the default as it doesn't work correctly, but it would still work for one connection
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| 14:03 | <cyberorg> https://launchpadlibrarian.net/242491812/epoptes-support-tightvnc.patch
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| 14:03 | <alkisg> (the Depend: line above means that it would only install tightvnc by default, but optionally the user could run `apt-get install epoptes tigervnc` to select that he wants to install tigervnc instead, I don't know if rpm files support that)
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| 14:03 | Yup, I don't think that last patch is needed at all, it's option (2), which is the same as (3)
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| 14:05 | <cyberorg> not when tigervnc is also installed, this patch prefers tightvnc instead of whatever alternatives is pointed to
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| 14:06 | <alkisg> Shouldn't that be a change in the packaging and its alternatives?
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| 14:07 | <cyberorg> yes the patch is not needed if tigervnc is not installed, we hit this bug only if it is
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| 14:07 | <alkisg> Either Depend: tightvnc | tigervnc, or use `update-alternatives` to select the correct one, if you have it
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| 14:07 | <cyberorg> yes that would work as well
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| 14:08 | <alkisg> OK, so, if you leave the _current_ upstream code as it is,
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| 14:08 | and use update-alternatives,
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| 14:08 | then you make tightvnc the default even if the user has both installed,
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| 14:09 | and you still allow the user to manually use `update-alternatives` himself in case he prefers tigervnc, losing the ability for multiple assists
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| 14:09 | Right?
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| 14:09 | Is that OK?
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| 14:09 | <cyberorg> that would work, but ideally I would prefer epoptes to use different port per connection and use distribution's default vncviewer
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| 14:09 | <alkisg> Sure, that a completely different patch there
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| 14:10 | <cyberorg> yes :)
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| 14:10 | findUnusedPort() has to be run on each launch of assist, don't know how to go about coding that
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| 14:10 | <alkisg> Btw, why doesn't self.vncviewerport = self.findUnusedPort() there work?
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| 14:11 | Ah
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| 14:11 | One different for each different client
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| 14:11 | <cyberorg> epoptes is using the same port for all assist launch, till epoptes is restarted
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| 14:12 | but at least you got the idea what we are facing
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| 14:12 | tightvnc was dropped in opensuse some time back, i am keeping it alive in server:ltsp repo only for epoptes
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| 14:12 | don't think rh clones has anything other than tigervnc available
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| 14:14 | <alkisg> OK, so again "os.path.isfile('/usr/share/locale/de/LC_MESSAGES/tigervnc.mo'):"
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| 14:14 | then, close the previous vnc and launch a new one
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| 14:14 | Does that sound OK? That is the _only_ change needed, we don't need another additional patch, right?
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| 14:14 | <cyberorg> not close, launch the new one with new port from new run of findUnusedPort(
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| 14:14 | close only if the other client is disconnected
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| 14:15 | how do we know when client disconnect?
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| 14:15 | <alkisg> That is client-side
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| 14:15 | Do you want to support multiple teachers running multiple vnc servers on a single client?
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| 14:16 | I.e. multiple teachers assisting or monitoring a single student at the same time?
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| 14:16 | <cyberorg> yes, that would be normal i guess
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| 14:16 | no, not the same student
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| 14:16 | <alkisg> Really?! You have 2 teachers helping 1 student remotely?!
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| 14:16 | Then we can close the previous one
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| 14:16 | <cyberorg> multiple teachers, multiple students, no overlap
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| 14:16 | <alkisg> Sure
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| 14:17 | That will work if we close the previous one
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| 14:17 | <cyberorg> how do they find out if there is overlap?
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| 14:17 | <alkisg> The connection is done on the client
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| 14:17 | vnc server runs on the client, and the teacher's vnc viewer connects there
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| 14:18 | <cyberorg> right now on the client, i got "connection refused" when running x11vnc on the same port
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| 14:18 | <highvoltage> áV#áV/win 35
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| 14:18 | <cyberorg> i understand, vncviewer -listen on epoptes server side, and x11vnc on client side
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| 14:20 | <alkisg> cyberorg: sorry yup you're right there, we'd need to self.vncviewer to become an array (list) instead of a single variable
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| 14:21 | That's messy, I'd propose to do the update-alternatives for now and we'll try it with Phantomas in a month or so
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| 14:22 | Maybe Phantomas will decide to use a vnc library instead of an external program there, so the point about tightvnc/tigervnc will be moot
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| 14:23 | <cyberorg> cool, that would be nice
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| 14:24 | <alkisg> cyberorg: is http://libvnc.github.io/ available in suse, fedora etc?
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| 14:24 | It's the library that x11vnc uses
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| 14:24 | It supports both clients and servers
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| 14:25 | <cyberorg> https://software.opensuse.org/search?utf8=%E2%9C%93&q=libvnc&search_devel=false&search_unsupported=false&baseproject=ALL
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| 14:25 | <alkisg> ...maybe this link is newer, dunno: https://github.com/LibVNC/libvncserver
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| 14:25 | <cyberorg> https://software.opensuse.org/package/libvncserver0
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| 14:26 | <alkisg> Nice, it's there
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| 14:26 | And libvncclient, right?
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| 14:26 | <cyberorg> yes
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| 14:26 | https://software.opensuse.org/package/libvncclient0
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| 14:26 | <alkisg> Cool, ok, do it with update-alternatives for now and we'll see about using those libraries instead
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| 14:27 | This will probably also allow for stretching windows to fit the screen etc
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| 14:29 | <cyberorg> applying the patch in the package, don't want to change user's alternatives setup https://build.opensuse.org/package/show/server:ltsp/epoptes
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| 14:33 | <alkisg> OK, we'll leave the bug open to solve it either with multiple ports or with library
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| 14:33 | * alkisg waves, later... | |
| 14:33 | alkisg is now known as alkisg_away | |
| 14:36 | <cyberorg> thanks
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| 14:36 | booting ltsp client from arm ltsp server :)
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