IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 17 September 2019 (all times are UTC)
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| 18:58 | <Sleaker> is there a way to get xdotool to manipulate windows on the ltsp5 display?
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| 18:58 | if I try to do stuff from command line it gives errors
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| 18:59 | eg trying to force the display via DISPLAY=IP:7 xdotool [command]
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| 18:59 | it works for older ltsp4
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| 19:00 | the xdotool command seems to work fine from within an X window session but not from something like ssh
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| 19:00 | but doing things like DISPLAY=:0 works fine via ssh
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| 19:01 | <Sleaker> or is that what -X is for?
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| 19:03 | <uumas> If you mean ssh -X then yes that enables x forwarding, ie. graphical apps over ssh
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| 19:06 | <Sleaker> hmm, looks like the issue is that running the command from the actual TC works fine.
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| 19:06 | but trying to run the command from the server to manipulate screens on the TC display doesn't work.
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| 19:09 | <uumas> What exactly are you trying to achieve
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| 19:09 | <Sleaker> trying to minimize a window on the TC from the server
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| 19:10 | works for screens on the main display, and on ltsp4 TCs, but not for ltsp5 TCs
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| 19:12 | <uumas> Okay, don't know enough about how thin clients work as I've always been using fat clients only. You are sure they are thin clients, not fat, right?
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| 19:13 | <Sleaker> they have no HD
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| 19:13 | so they better not be fat :P
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| 19:13 | they boot from a tftp/nbd server setup.
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| 19:14 | the whole system image gets pushed
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| 19:21 | <mwalters> FYI: around here the terminology is: Thin client = remote desktop, fat client = remote storage
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| 19:21 | (I guess we'll use thick client for a "traditional" workstation????)
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| 19:22 | <uumas> Yes, that's how fat clients work. Thin clients stream the entire screen from the server, fat clients run locally and just have root over nbd.
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| 19:22 | <Sleaker> haha
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| 19:22 | <uumas> Ltsp4 might have been thin clients only, idk.
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| 19:23 | <Sleaker> it was
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| 19:23 | <uumas> Ltsp5 supports both
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| 19:23 | Ltsp19 is fat only
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| 19:23 | <Sleaker> seemsbad
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| 19:24 | <uumas> But you're probably using fat clients which explains why your commands aren't working. I recommend epoptes for managing fat client sessions.
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| 19:24 | <Sleaker> epoptes doesn't allow command-line manipulation though?
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| 19:24 | trying to script this
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| 19:24 | <uumas> It does!
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| 19:24 | Oh, well not for scripts
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| 19:25 | <Sleaker> so what's the equivalent of running an xdotool command on a remote screen?
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| 19:25 | <uumas> But you could have the script run on the clients?
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| 19:25 | <Sleaker> lol
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| 19:25 | uumas: how do you close an application that's running on the server from a command run on the client?
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| 19:25 | <uumas> I don't know about xdotool. What do you want to achieve?
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| 19:26 | So you want to close a single application without logging the user out?
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| 19:26 | <Sleaker> all of the programs are run from the server, nothing runs on the client except the x client.
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| 19:26 | yup
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| 19:26 | but not kill it, minimize it heh
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| 19:27 | so like if I'm sshed into the client, I can see it has a display on :7 running right. but on the server the actual application is running on display IP:7
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| 19:27 | so trying to figure out a way to minimize the window via xdotool when the window is being drawn remotely.
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| 19:28 | <mwalters> ¯\_(ツ)_/¯
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| 19:28 | That's my grand contribution
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| 19:28 | best of luck!
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| 19:28 | <Sleaker> can't run the command on the client itself because the application isn't actually running on the client heh
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| 19:28 | yah thanks mwalters :)
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| 19:29 | and honestly, this is such an edge case because people don't want to just rewrite an integrated application :-/
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| 19:30 | <uumas> Are you sure it's running remotely? That's not the default behavior of ltsp5.
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| 19:31 | <Sleaker> 100%
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| 19:31 | we don't support local apps
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| 19:31 | this is ltsp5 from trusty btw.
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| 19:31 | things may have changed since then
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| 19:33 | <uumas> Yeah, it's recommended to use the ppa (http://wiki.ltsp.org/wiki/Installation), but honestly I'd just go with ltsp19 (with fat clients) if you're setting up a new setup now.
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| 19:33 | <Sleaker> it's not a new setup.
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| 19:34 | it's not something that can be changed out
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| 19:34 | we support ~2400 locations nationwide with the current setup on a prebuilt system install.
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| 19:34 | just trying to mangle stuff to continue working for something new we're developing, ;)
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| 19:35 | but anyhow, sounds like you're not super sure on the display thing, I'll check upstream in linux and see if anyone has ideas there
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| 19:35 | <uumas> Okay, well, alkisg might be able to help you more
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| 19:39 | <alkisg> Sleaker: in the epoptes code i have an "export-display" thing
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| 19:39 | It will properly export the display for you to use
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| 19:41 | Sleaker: if you want more info, mention if you're using thin or fat clients, and LDM_DIRECTX or not
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| 19:42 | And if you want access as root, or as the user
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| 19:42 | In general, DISPLAY isn't enough, you also need access to Xauthority
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| 19:45 | <mwalters> trusty isn't getting security updates anymore, is it?
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| 19:45 | just throwing that out there
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| 19:47 | oh, I guess you do if you're a canonical customer
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| 19:48 | <Sleaker> mwalters: I'm aware, exec here doesn't want to prioritize security updates
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| 19:48 | I told them it was an issue 6 months before EOL
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| 19:48 | * Sleaker shrugs | |
| 19:48 | * mwalters straightens tie | |
| 19:48 | <mwalters> sounds prudent
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| 19:48 | ;)
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| 19:49 | <Sleaker> alkisg: so what I'm trying to do is just minimize a window that's running on the thin client, pretty sure it's a thin. since it's setup to run everything on the server
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| 19:50 | lemme double-check on LDM_DIRECTX
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| 19:50 | I think it might be true
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| 19:52 | <alkisg> open a terminal on client and echo $DISPLAY
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| 19:52 | <Sleaker> it's IP:7
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| 19:52 | ex: 192.168.151.102:7
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| 19:52 | note: the terminal 'on client' is a process on the server.
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| 19:54 | <alkisg> Then LDM_DIRECTX is true
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| 19:55 | And you ssh to the client?
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| 19:55 | <Sleaker> not usually.
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| 19:56 | but trying to run commands to manipulate the display from ssh also weren't working
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| 19:57 | <alkisg> i mean, how do you plan to run that command
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| 19:57 | via ssh?
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| 19:57 | or other means?
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| 19:57 | <Sleaker> was hoping to run it from the server via command line.
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| 19:58 | just trying to figure out where the command needs to run to manipulate the display properly
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| 19:58 | trying to do DISPLAY=IP:7 xdotool [command] doesn't work
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| 19:58 | <alkisg> You need XAUTHORITY to point to the user's /home/user/.Xauthority
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| 19:58 | <Sleaker> connecting to the client and running the command isn't possible, because the app being manipulated via xdotool isn't running on the client.
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| 19:59 | ok can try that
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| 20:01 | <alkisg> Sleaker: both the server and the client have access to the display
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| 20:02 | The client via /run/ldm/xauthority-xxx/something, and the server via xauth and /home/username/.Xauthority
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| 20:03 | <Sleaker> thanks alkisg, setting XAUTHORITY worked
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| 20:03 | A+ :)
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| 20:09 | <Sleaker> lol section was in here too...
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| 20:09 | answered in ##linux but not in here O_o
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