IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 7 April 2021 (all times are UTC)
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| 04:46 | <kidar_> hi i have a problem i have a ubuntu mate 16.04 running ltsp (no dhcp). After upgrading to 18.04 my clients cannot connect to the ltsp server
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| 04:46 | <alkisg> Hi kidar_
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| 04:47 | What are your client specifications, CPU and RAM?
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| 04:47 | <kidar_> hi, long time. it is the same server u setup for me in 2017
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| 04:47 | i5 and 4gig ram
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| 04:48 | <alkisg> Sorry but I don't remember the client specifications from back then :)
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| 04:48 | The clients are i5?
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| 04:48 | <kidar_> mixture
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| 04:48 | <alkisg> What's your oldest client that you need to support? Is it 64 bit, can you upgrade to 20.04?
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| 04:49 | <kidar_> client are old pcs without hd. about 2gig ram
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| 04:50 | <alkisg> Can you vnc to me?
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| 04:50 | !vnc-edide
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| 04:50 | <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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| 04:50 | <kidar_> server can be upgraded to 20.04 if u suggest
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| 04:50 | <alkisg> I can't suggest until I know if the clients are 32 bit or 64 bit
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| 04:50 | And if the server installation is 32bit, it can't be upgraded to 20.04 as it's only for 64bit
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| 04:51 | <kidar_> i can vnc into u no problems. the clients however are not here. i just have the hard drive
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| 04:51 | which i upgraded to 18.04
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| 04:52 | <alkisg> OK, please do vnc, so that we see if the server installation is 32bit
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| 04:54 | <kidar_> ok. i alss have the original 16.04 hd which works and the 18.04 which only has internet connection. which would you want me to vnc
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| 04:55 | <alkisg> The 18.04
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| 04:55 | <kidar_> ok
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| 05:00 | i cannot connect
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| 05:01 | to srv1-dide.ioa.sch.qr
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| 05:01 | <alkisg> Do you have xorg running, or are you using ssh?
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| 05:01 | Ah, it's gr, not qr
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| 05:01 | greece
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| 05:04 | OK so you have LTSP5, amd64 server installation, with an i386 chroot
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| 05:04 | You can't upgrade to 20.04 that way
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| 05:05 | Also, you have a customized dnsmasq.conf, with a note to remove the boot entries from ltsp-server-dnsmasq.conf
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| 05:05 | I guess that's what you didn't do, and your clients won't boot?
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| 05:05 | But in any case, if your clients have at least 2 GB RAM, which would mean they're 64bit, you should consider upgrading to 20.04 and ltsp21
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| 05:06 | <kidar_> can i connect the old 16.04 and u can advise on how to update that one?
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| 05:06 | <alkisg> It's not different
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| 05:06 | <kidar_> will take me 1 min to change the hard drive
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| 05:06 | <alkisg> There's no point in seeing 16.04
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| 05:06 | If you want my advice, it would best to start by listing the client's CPU/RAM
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| 05:07 | So that we can see if you can upgrade to 20.04 or not
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| 05:07 | But you'd need all the old clients; maybe some of them are not 64bit and you can't use 20.04
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| 05:09 | So, make a list, for example: E8400 with 2GB RAM, Pentium 4 with 1 GB RAM etc
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| 05:09 | You can see the cpu model by running cat /proc/cpuinfo
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| 05:09 | <kidar_> they are all pentium celeron and above it is a mixture at the moment as there are only 6 pcs working. we hard a burglary and they stole all my i5(29 of them). i guess we can do 20.04 and i will get new clients
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| 05:10 | all the pcs have more than 2gig
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| 05:11 | <alkisg> kidar_: OK from what I can see you don't have anything too customized; it would be a lot easier if you just did a clean 20.04 installation by following its installation page:
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| 05:11 | !install
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| 05:11 | <ltspbot`> install: To install LTSP: https://ltsp.org/docs/installation/
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| 05:11 | <alkisg> It should take less than an hour for that
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| 05:12 | <kidar_> ok how about the client users etc that are already created with there docs.
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| 05:13 | <alkisg> You can keep the existing /home if you like
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| 05:13 | You have 500+ GB free, you can keep the old installation in a subdirectory
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| 05:13 | And keep /home and the users list
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| 05:14 | If you prefer to just upgrade, sure, you can do that too
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| 05:14 | You'll just need to remove ltsp5 and install ltsp21 then
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| 05:15 | <kidar_> so i can just do a normal upgrade to 20.04, then remove install ltsp21
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| 05:17 | <alkisg> Yes
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| 05:18 | <kidar_> ok let me do that now.thanks
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| 05:19 | <alkisg> You're welcome
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| 08:05 | <kidar_> hi alkisg, i have updated to 20.04 and installed ltsp up to dnsmasq
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| 08:05 | i also followed the instructions that u had to speed up the server but it removed all the education stuff
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| 08:26 | hi alkisg, i have updated to 20.04 and installed ltsp up to dnsmasq
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| 08:26 | <kidar_> i also followed the instructions that u had to speed up the server but it removed all the education stuff
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| 09:06 | <alkisg> kidar_: hi, are things ok now or do you need help?
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| 09:24 | <kidar_> need help now
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| 09:24 | <alkisg> kidar_: what kind of help, to reinstall the missing applications? Which ones?
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| 09:28 | <kidar_> i ran dnsmasq now i have no access to net. pc only has one nic. i can ping an ip address but not a www address
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| 09:28 | regarding packages the educational ones
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| 09:29 | <alkisg> kidar_: run this command: x11vnc -connect 81.186.20.0
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| 09:30 | <kidar_> nothing
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| 09:35 | <alkisg> kidar_: ok, try to boot a client now
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| 09:35 | ...do you have a test client around?
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| 09:36 | <kidar_> yeh just did. it runs and now itsys press a key to reboot
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| 09:37 | <alkisg> kidar_: you forgot some installation commands, try it again now
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| 09:37 | <kidar_> no nothing now
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| 09:38 | before it got an ip then did something and now nothing
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| 09:38 | <alkisg> Power it off, then power it on
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| 09:39 | <kidar_> the client or server?
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| 09:39 | <alkisg> The client
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| 09:39 | <kidar_> ok
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| 09:40 | still nothing
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| 09:40 | <alkisg> I don't see any dhcp request, is the cable properly connected?
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| 09:40 | If so, get a screenshot of the client screen with your mobile phone, and upload it somewhere
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| 09:40 | !screenshot
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| 09:40 | <ltspbot`> screenshot: to upload a screenshot use a site like https://prnt.sc/ or https://snag.gy/ and then paste the URL here
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| 09:41 | <kidar_> dhcp is from the router
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| 09:41 | <alkisg> Yes, the ltsp server is notified when ltsp clients request an ip from the router
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| 09:41 | Apr 07 11:35:27 pst-ProLiant-DL60-Gen9 dnsmasq-dhcp[30764]: PXE(enp2s0) 00:19:db:7a:d1:95 proxy
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| 09:41 | I didn't see that line now
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| 09:41 | OK now it's there
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| 09:41 | <kidar_> yep
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| 09:42 | <alkisg> Disconnected cable?
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| 09:42 | <kidar_> switched it off waited a min then switched on.
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| 09:42 | <alkisg> OK
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| 09:42 | <kidar_> it is still saying press a key to reboot
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| 09:42 | <alkisg> Can you upload a screenshot?
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| 09:43 | <kidar_> its just a blank screen with press a key to reboot
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| 09:43 | <alkisg> kidar_: reboot it once more
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| 09:43 | You may need to wait one minute again etc
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| 09:44 | (actually you may unplug it from the power, then press power on to discharge the capacitors, and then plug it to power again, and press power on)
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| 09:44 | <kidar_> ok
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| 09:44 | <alkisg> (so that you don't need to wait 1 minute)
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| 09:46 | <kidar_> still doing the same disconnected network and power and pressed the power cable. will connect again
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| 09:47 | <alkisg> Disconnect the power cable, not the network cable
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| 09:47 | So that it doesn't have 220V
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| 09:47 | Then press the power on button
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| 09:47 | Then connect the 220V again
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| 09:52 | <kidar_> did it still not seeing the server
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| 09:52 | <alkisg> Is it connected directly to the router, or to a switch?
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| 09:53 | <kidar_> ok it is on now
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| 09:53 | connected to the router
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| 09:54 | <alkisg> kidar_: another ltsp command was missing, I ran it now, you'll need to reboot the client again
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| 09:54 | <kidar_> it came up with a blue screen asking me to select. then by the i got it came up with reboot
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| 09:54 | <alkisg> You didn't follow all the installation instructions... :)
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| 09:54 | OK, let it reboot
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| 09:56 | <kidar_> sorry i thought i did my sincere apologies
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| 09:56 | the packages i was talking about were the edubuntu ones
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| 09:57 | <alkisg> Edubuntu doesn't exist since 2012, so I'm not sure which packages you want
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| 09:57 | You may reinstall them from synaptic
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| 09:58 | <kidar_> last time u did it manually for me the tux and primary school
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| 09:58 | <alkisg> Search for tux in synaptic and install it
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| 09:59 | <kidar_> so i am guessing for now it is working
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| 09:59 | <alkisg> Yes, it looks fine
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| 09:59 | <kidar_> i dont need to do anything to the server
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| 10:00 | <alkisg> I don't think so
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| 10:00 | Except than to install programs
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| 10:01 | <kidar_> ok you had a command that u used to install the packages would that still work
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| 10:01 | from terminal
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| 10:01 | <alkisg> I don't remember, I help in 1000+ installations per year :)
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| 10:01 | apt install program1 program2...
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| 10:01 | But I don't know which programs you want
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| 10:04 | <kidar_> i pasted something on the terminal can u see it
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| 10:06 | <alkisg> kidar_: no, edubuntu programs do not exist anymore
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| 10:06 | There's no ubuntu-edu-primary package
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| 10:06 | The programs are still there, but you need to specify them one by one
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| 10:06 | E.g. apt install tuxpaint tuxtype kolourpaint whatever
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| 10:07 | <kidar_> ohh ok thanks for the help in setting this up again for me.
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| 10:07 | take care
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| 10:08 | <alkisg> You're welcome; keep notes so that you can do it yourself next time!
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| 10:08 | The installation page is easy enough to follow
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| 10:08 | <kidar_> need to know what u fixed and what i did not do right
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| 10:08 | <alkisg> You didn't read the installation page
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| 10:08 | You only ran half of it
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| 10:09 | <kidar_> will try and setup a dummy one at home and check. but once again thanks to you my school will be back on
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| 10:09 | <alkisg> cheers
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| 10:09 | <kidar_> i ran half because could not access the net
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| 10:10 | <alkisg> That was because the 16.04 was using resolvconf and 18.04 didn't use it
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| 10:10 | It's an "ubuntu upgrade" issue, unrelated to ltsp
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| 10:10 | So I removed the old resolvconf package
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| 10:11 | <kidar_> ohh ok , one last question.
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| 10:11 | you have chrootless, chroot and virtual
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| 10:12 | <alkisg> Use chrootless, it's easier for you and it suits you
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| 10:12 | <kidar_> thats what i needed to know.
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| 10:12 | <alkisg> You may run `rm -rf /opt/ltsp` later on btw
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| 10:12 | You don't need that folder anymore, it's the old ltsp, you may delete it
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| 10:14 | <kidar_> ok will do so
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| 10:50 | alksig, after installing the packages will this command still work to update the image sudo ltsp-update-image -c /
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| 11:07 | <kidar_> alksig, after installing the packages will this command still work to update the image sudo ltsp-update-image -c /
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| 14:27 | <Helenah> alkisg, Okay going to use epoptes now, never used it. :3
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| 14:28 | alkisg, It would be good if I could see the X mode of individual clients, they are all wrong, one of them is using industrial 4K resolution when it should be using standard 4K resolution, the other one well that's worse, that's the one we are dealing with right now. :3
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| 14:29 | <alkisg> Helenah: LTSP doesn't affect the client resolutions, but yeah epoptes would help a lot there
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| 14:29 | If you followed the installation page, you might already have it installed...
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| 14:29 | !install
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| 14:29 | <ltspbot`> install: To install LTSP: https://ltsp.org/docs/installation/
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| 15:02 | <Helenah> alkisg, I was going to play more with epoptes but my LTSP server is headless and now I can't log into my thin clients!
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| 15:02 | I think it would be best if I put some remote desktop server on the LTSP server, right?
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| 15:02 | I'm going to do that now.
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| 15:04 | <alkisg> Helenah: you can run `ssh -X epoptes`
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| 15:16 | <Helenah> alkisg, Yes done :3
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| 15:42 | <Helenah> alkisg, I seem to have no xorg.conf on the client that the screen goes blank on when starting GDM
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| 15:43 | But on the working client, I have an xorg.conf file
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| 15:43 | I'm really struggling with epoptes, it seems a user has to be logged into the client before I can control it, open a terminal to it even.
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| 15:43 | So I'm not sure how I'm supposed to run xrandr on the client.
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| 16:01 | <alkisg> Helenah: no, you should be able to control the client before log in as long as epoptes is properly installed
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| 16:01 | Are you using gnome?
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| 16:01 | <Helenah> gnome is on the system yes, basic gnome (Ubuntu Server) and GDM :3
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| 16:02 | <alkisg> GDM doesn't allow vnc-like programs
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| 16:02 | <Helenah> Oh o:
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| 16:02 | <alkisg> I reported it as a bug but they refused to accept it as a valid use case
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| 16:02 | <Helenah> Yeah weird that they did that! lol
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| 16:03 | It makes sense that if a computer is to be graphically remotely accessible that the login screen would also allow that lol
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| 16:03 | <alkisg> I think it'll take another 10 years for me to switch back to gnome, it's not suitable for education anymore
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| 16:03 | I think MATE and KDE are better options for now
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| 16:19 | <Helenah> alkisg, In GNOME settings, I was able to set both monitors to 3840 x 2160 (16:9) @ 23.98 Hz and that's correct.
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| 16:20 | I tried adding that to X_MODELINE in /etc/ltsp/ltsp.conf however that has not worked.
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| 16:20 | I would rather have correct resolutions globally rather than having to guess what I'm typing in at GDM before I get a display...
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| 16:21 | <alkisg> Helenah: are you sure you're using xorg and not wayland?
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| 16:21 | wayland isn't affected by xorg.conf settings...
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| 16:21 | <Helenah> alkisg, Oh, good point! o.o
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| 16:22 | alkisg, How do I check?
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| 16:23 | Oh I think I figured it
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| 16:24 | <alkisg> Just run xrandr after login
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| 16:24 | <Helenah> XDG_SESSION_TYPE returns x11
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| 16:24 | <alkisg> if it says XWAYLAND...
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| 16:24 | <Helenah> I'll do that too
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| 16:24 | <alkisg> Btw, it's possible that gdm is using wayland, and the session uses x11
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| 16:24 | ...just install lightdm and call it a day :D
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| 16:25 | <Helenah> Oh o:
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| 16:26 | <alkisg> I gave up on gnome before figuring out all its quirks
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| 16:30 | <Helenah> Installing lightdm now :3
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| 16:38 | alkisg, I don't usually use display managers.
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| 16:38 | But Ubuntu is notorious for recommending one!
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| 16:38 | lol
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| 16:38 | Or suggesting one?
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| 16:38 | heh
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| 16:42 | <alkisg> Helenah: eh, you can omit gdm and its problems then
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| 16:42 | Use nodm or something
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| 16:49 | <Helenah> alkisg, I'm using lightdm cause I don't want to be automatically logged in.
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| 16:49 | But... even at lightdm, same wrong resolution :/
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| 16:49 | <alkisg> (07:37:53 PM) Helenah: alkisg, I don't usually use display managers. ==> then how would you log in?
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| 16:49 | Now with lightdm, can you access the client via epoptes?
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| 16:51 | <Helenah> alkisg, No
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| 16:51 | <alkisg> Are you using a chroot?
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| 16:51 | <Helenah> ltsp image /
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| 16:52 | <alkisg> Can you login to a client, and then VNC to me from there?
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| 16:52 | !vnc-alkisg
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| 16:52 | <ltspbot`> vnc-alkisg: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect alkisg.ltsp.org; this is a reverse connection, it doesn't need port forwarding etc.
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| 16:54 | <Helenah> alkisg, My gf is paranoid with that
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| 16:55 | o.o
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| 16:55 | Okies
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| 16:55 | <alkisg> No worries
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| 16:55 | I just don't have enough time now, we can check it out via IRC another day, although it's not LTSP related...
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| 16:55 | It's just about generating a correct xorg.conf for lightdm to use
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| 16:57 | <Helenah> alkisg, Ah!
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| 16:57 | Thanks
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| 18:02 | <Helenah> alkisg, Since installing lightdm and updating the image, the thin clients have no audio, yeah, weird I know! Like why would a display manager affect audio? I've checked pavucontrol and alsamixer, the sound card is detected correctly and being used to play audio through but I don't hear it.
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| 18:03 | <alkisg> I can't imagine anything related to the DM, but maybe it's just using the wrong output, e.g. jack instead of HDMI?
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| 18:04 | <Helenah> There is no jack hardware and it's using HDMI
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| 18:04 | I can see it's using the sound device of my graphics card which is what I want.
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| 18:05 | <alkisg> Not sure about how GNOME handles audio, maybe you can ask in #ubuntu?
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| 18:05 | In MATE, I can see the settings from the volume applet
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| 18:06 | <Helenah> Yeah I just did a GNOME speaker test, no worky, I'll ask there. :)
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