IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 29 January 2020 (all times are UTC)
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| 06:52 | <alkisg> Hi aleppik, I'll be back in 30 mins, if you can come back then we can see the issue then
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| 06:53 | <aleppik> OK
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| 07:19 | <alkisg> aleppik: back
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| 07:19 | !vnc-edide
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| 07:19 | <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
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| 07:21 | <aleppik> clients with names starting ws are guests
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| 07:24 | <alkisg> aleppik: so, the problem is on ltsp1232 and ltsp1495, right?
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| 07:24 | <aleppik> No, I can broadcast to these computers
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| 07:25 | <alkisg> Where is the problem?
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| 07:25 | On wc*?
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| 07:25 | *ws?
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| 07:25 | <aleppik> Yes, on WS
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| 07:25 | logged in as guests
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| 07:26 | Please, try on ws04
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| 07:26 | <alkisg> ok sorry
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| 07:26 | I asked in the terminal where to test but you didn't see it
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| 07:32 | aleppik: the problem is that the client DISPLAY/XAUTHORITY isn't working
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| 07:32 | Looking why...
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| 07:43 | aleppik: can you put the guest password in ws04?
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| 07:47 | aleppik: so... it seems that setting the correct DISPLAY and XAUTHORITY for user root isn't working when home is nfs
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| 07:47 | Which is strange, because it's working fine here on 18.04 and 20.04
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| 07:47 | <aleppik> Strange indeed
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| 07:48 | <alkisg> If you kill the root process of the epoptes-client, you'll be able to broadcast to user screens
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| 07:48 | But then you'll lose some other features that the root epoptes-client provides
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| 07:48 | I'll note it in the bug report, and see if I can find time to troubleshoot it, but it'll probably be much later (months...)
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| 07:49 | <aleppik> Now I have somethink to think about myself
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| 07:49 | I can try the same setup on 20.04
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| 07:50 | or 18.04
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| 07:51 | <alkisg> I wonder if snap/apparmor is involved
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| 07:51 | We uninstall it here immediately
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| 07:51 | (it imposes NFS restrictions etc)
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| 07:51 | <aleppik> I'll try that
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| 07:52 | <alkisg> OK, good luck. I'm available for hire if needed, but it's not an immediate concern for the "free support" of the "open source development" part :)
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| 07:52 | I.e. most people don't have that issue
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| 07:53 | <aleppik> Thank you
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| 07:53 | <alkisg> You're welcome
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| 08:13 | <alkisg> Heh, that eu^ user yesterday was right; pam unlocking works fine on ubuntu mate 16.04, but not on ubuntu gnome 16.04
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| 08:13 | *screensaver unlocking
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| 08:21 | Ah OK it's a known issue, happens with LDAP too: https://bugs.launchpad.net/ubuntu/+source/nss-pam-ldapd/+bug/1314095
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| 09:43 | <alkisg> It only affects unity though, not 18.04+, so ...let's not care about it :)
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| 10:17 | <eu^gw-2s00infcsd> Hi
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| 10:17 | <alkisg> mhwasil is that you?
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| 10:17 | <eu^gw-2s00infcsd> yes
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| 10:17 | <alkisg> Hi, type this to set your name here:
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| 10:17 | /nick mhwasil
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| 10:17 | eu^gw-2s00infcsd is now known as mhwasil | |
| 10:17 | <mhwasil> cool
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| 10:17 | <alkisg> Nice, now do the following command: x11vnc -connect srv1-dide.ioa.sch.gr
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| 10:17 | If you don't have x11vnc, apt install it first
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| 10:19 | <mhwasil> it seems it failed to open xorg
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| 10:19 | 29/01/2020 11:18:28 x11vnc version: 0.9.13 lastmod: 2011-08-10 pid: 307229/01/2020 11:18:28 XOpenDisplay("") failed.29/01/2020 11:18:28 Trying again with XAUTHLOCALHOSTNAME=localhost ...29/01/2020 11:18:28 29/01/2020 11:18:28 *** XOpenDisplay failed. No -display or DISPLAY.29/01/2020 11:18:28 *** Trying ":0" in 4 seconds. Press Ctrl-C to
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| 10:19 | abort.29/01/2020 11:18:28 *** 1 2 3 4 No protocol specified29/01/2020 11:18:32 XOpenDisplay(":0") failed.29/01/2020 11:18:32 Trying again with XAUTHLOCALHOSTNAME=localhost ...No protocol specified29/01/2020 11:18:32 XOpenDisplay(":0") failed.29/01/2020 11:18:32 Trying again with unset XAUTHLOCALHOSTNAME ...No protocol specified29/01/2020 11:18:32
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| 10:19 | 29/01/2020 11:18:32 ***************************************29/01/2020 11:18:32 *** XOpenDisplay failed (:0)
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| 10:19 | <alkisg> !paste
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| 10:19 | <ltspbot> paste: To avoid channel flooding, please upload text longer than 3 lines to http://paste.debian.net. Don't forget to paste the resulting URL here.
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| 10:19 | <alkisg> Is xorg running/
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| 10:19 | ?
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| 10:20 | Don't run that command as root, run it as user, inside a xorg session
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| 10:20 | <mhwasil> owh, it was root
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| 10:20 | <alkisg> Also, it won't work if you're using wayland
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| 10:21 | <mhwasil> are you asking for password?
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| 10:21 | <alkisg> Don't tell it to me, just write it there and press enter
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| 10:21 | So that we're able to run ltsp image etc
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| 10:25 | mhwasil: it works for me, how are you usually using root?
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| 10:25 | sudo su -l ?
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| 10:25 | <mhwasil> yes
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| 10:33 | <alkisg> mhwasil: you have a weird /usr/sbin/partprobe which isn't part of any debian package
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| 10:33 | And your /sbin/partprobe was marked non-executable
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| 10:34 | Do you know anything about these?
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| 10:34 | <mhwasil> No
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| 10:36 | <alkisg> mhwasil: OK so the problem is that losetup -P works, partprobe only works after 1 second (!), and losetup -P isn't available in busybox
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| 10:37 | <mhwasil> so it works with su right?
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| 10:37 | <alkisg> No, su was unrelated
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| 10:37 | The problem is a "race condition"
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| 10:37 | <mhwasil> I really have no idea about this
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| 10:37 | <alkisg> it sometimes work, sometimes not, depending on if partprobe returns quickly (=wrong) or 0.0001 sec later
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| 10:37 | <mhwasil> thatś why you put delay in there
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| 10:38 | <alkisg> Yes, but now it's not needed, I found a better way with losetup -P
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| 10:38 | But
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| 10:38 | <mhwasil> is it because of the debian distribution?
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| 10:38 | <alkisg> I think it's because you have a very fast drive
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| 10:38 | Somehow partprobe returns before the result is ready
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| 10:39 | <mhwasil> does it relate to intel VT?
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| 10:39 | I actually activate intel vt in the bios
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| 10:39 | <alkisg> No I don't think so
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| 10:39 | Now, I need this from you:
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| 10:39 | I will need some time to think and test locally in my pc, busybox etc
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| 10:39 | After about half an hour, I'll have a solution and I'll want to test it in your pc
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| 10:39 | So, can we continue in half an hour?
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| 10:39 | <mhwasil> okay, no problem
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| 10:40 | i will keep the chat open
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| 10:40 | <alkisg> OK talk to you then
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| 11:03 | <alkisg> mhwasil: here is the explanation: https://github.com/ltsp/ltsp/issues/112
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| 11:03 | Now I will start coding the solution...
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| 11:04 | https://github.com/ltsp/ltsp/issues/112#issuecomment-579704835
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| 11:06 | mhwasil: it will take me more time than I was planning. Do not wait for me. I will upload a new version in the proposed PPA, and I will ask you in the bug report to test it
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| 11:06 | <mhwasil> (y)
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| 11:06 | <alkisg> :)
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| 11:06 | mwalters: ah, is it working for you now there?
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| 11:06 | So that you can proceed for now?
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| 11:07 | Run x11vnc -connect srv1-dide.ioa.sch.gr
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| 11:07 | So that I see what I left in the code there
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| 11:07 | <mhwasil> yes, it seems the arg -P works
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| 11:07 | <alkisg> OK, we don't need a sleep nor an "echo" there
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| 11:08 | mhwasil: nice, use that one until I have the new version
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| 11:13 | <mhwasil> thank you very much for the support
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| 13:25 | <mwalters> 18.04/ltsp5 is still working just fine. Thanks for asking ;)
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| 14:38 | <theedude> I'm new to this and honestly might be over my head, but I'm going to try and setup a lab. Anyway i was reading documentation and saw that thin client is no longer supported and would have to use vnc or other remote solution. I was hoping to use some Diskless Workstations 1720 that I got from work. These are the type I will not be able to use, correct?
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| 14:39 | <quinox> diskless is still fine
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| 14:39 | thin clients = the GUI runs on the server, this is going the way of the dodo
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| 14:40 | you'd want thin clients when your workstations are reallly low-spec
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| 14:41 | (I have no idea what kind of spec a 1720 has)
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| 14:41 | <theedude> oh ok. thats a relief. I got 4 of these diskless and really want to experiment with them. Thank you so much.
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| 14:43 | Intel Atom, Linux Terminal Server Project (LTSP) - Version 5.x Ready, Dual Monitor Capability (VGA + DVI), 2GB DDRII Memory
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| 14:43 | thats from their site
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| 14:46 | <quinox> 2GB ram is cutting it close nowadays, websites eat up a lot of memory
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| 14:49 | http://store.disklessworkstations.com/200123.html
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| 14:49 | I didn't even know they branded machines specifically for LTSP
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| 14:51 | <alkisg> quinox: the guys at disklessworkstations.com were part of the initial ltsp team back in 2000, they formed that company for ltsp
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| 14:52 | They still sell diskless workstations, but they haven't written ltsp code in more than a decade...
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| 14:52 | <elias_a> Nice :)
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| 20:30 | <vagrantc> alkisg: with the breakage for https://github.com/ltsp/ltsp/issues/43 ... should i hold off on uploading to Debian?
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| 20:31 | <alkisg> vagrantc: yes please there's one more thing I need to push tomorrow
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| 20:31 | Eeeh actually it's not related to #43 anymore
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| 20:31 | <vagrantc> new issue?
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| 20:32 | <alkisg> https://github.com/ltsp/ltsp/issues/112#issuecomment-579704835
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| 20:32 | <vagrantc> i can give the current code some testing regardless and see if i don't find anything else :)
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| 20:32 | <alkisg> A partprobe bug in nvme drives
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| 20:32 | I want to find a workaround there
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| 20:32 | <vagrantc> right, saw that too :)
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| 20:33 | <alkisg> That's all that's left in my todo list for the release, but I'm ok without it as well
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| 20:33 | It can go in a future release, I don't mind
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| 20:33 | So if you have time today, go ahead and release, I tested a lot today
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| 20:33 | Booted all my .isos and VMs etc
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| 20:33 | <vagrantc> the .iso/VM breakage was the most alarming to me
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| 20:33 | or at least the biggest regression
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| 20:34 | <alkisg> The iso breakage was related, there wasn't any vm breakage though
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| 20:34 | <vagrantc> wait, nvme ... on a network booted machine? :)
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| 20:34 | <alkisg> This was a new issue
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| 20:34 | No, partprobe on an ltsp server returns before the probe finishes
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| 20:34 | So /dev/loop0p1 isn't ready yet
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| 20:34 | <vagrantc> ah!
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| 20:35 | <alkisg> I'll work around that using losetup -P instead, but it's not always available, so I'll need a big case
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| 20:35 | I'll have that ready tomorrow, if you want to test today and release tomorrow
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| 20:35 | <vagrantc> will see how it goes :)
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| 20:35 | <alkisg> ;)
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| 20:44 | <vagrantc> alkisg: would it break your workflow if you used UNRELEASED in debian/changelog instead of unstable ?
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| 20:44 | alkisg: until, of course, a release is made?
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| 20:45 | <alkisg> Not at all; I only put unstable there for a smaller diff, e.g. in case we just release without changes in changelog
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| 20:45 | I'll do that next times then
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| 20:45 | <vagrantc> the tooling around package building and various qa pages at debian work a little better that way
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| 20:46 | <alkisg> Sure, np at all
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| 20:46 | <vagrantc> thanks :)
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| 20:46 | none of which is a deal-breaker, but if it's no trouble to you :)
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| 20:47 | <alkisg> So, I update the changelog and do ppa builds with UNRELEASED, and when you're ready to upload to debian, you edit changelog and change that to "unstable", right?
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| 20:47 | <vagrantc> basically
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| 20:48 | <alkisg> Nice, will do
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| 20:48 | <vagrantc> i've often enough had various beurocratic changes anyways that i need to touch debian/changelog before a release anyways so it shouldn't add needless commits too often
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| 20:52 | <alkisg> In many cases I don't even update the changelog when sending PPA builds, now I wanted LTSP 20.x to come as early as possible to stop people from calling it "ltsp19" like the version is part of the name... :D
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| 20:52 | Anyways, time to head to bed. /me waves :)
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| 20:54 | * vagrantc waves | |
| 20:54 | <vagrantc> yeah, i generally only update the changelog as part of the release, but figured that was at least part of what you were doing :)
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| 22:05 | <vagrantc> alkisg: didn't stress it too difficult, but my previous installation seems to continue to work just fine.
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| 22:36 | !init
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| 22:36 | <ltspbot> I do not know about 'init', but I do know about these similar topics: 'INIT_COMMAND_EPOPTES', 'INIT_COMMAND_GUEST', 'INIT_COMMAND_SSH', 'lowram-initramfs', 'ltsp-initrd'
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| 22:36 | <vagrantc> !ltsp-initrd
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| 22:36 | <ltspbot> ltsp-initrd: Create the ltsp.img initrd add-on: https://github.com/ltsp/ltsp/blob/master/docs/ltsp-initrd.8.md
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| 23:11 | * vagrantc struggles to figure out how to select display manager with ltsp.conf values | |
| 23:11 | <vagrantc> i though simply adjusting /etc/X11/default-display-manager would work, but apparently that's not enough with systemd
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| 23:14 | looks like i also have to adjust /etc/systemd/system/display-manager.service
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| 23:40 | POST_INIT_DISPLAY_MANAGER="echo /usr/sbin/gdm3 > /etc/X11/default-display-manager"
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| 23:40 | POST_INIT_DISPLAY_MANAGER_SERVICE="ln -svf /lib/systemd/system/gdm3.service /etc/systemd/system/display-manager\
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| 23:40 | .service"
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| 23:40 | that did the trick for me
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| 23:40 | * vagrantc should probably learn how to update the wiki | |
| 23:40 | <vagrantc> it's a pretty niche use ... but it demonstrates an example of how to do use some ltsp features
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