IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 8 April 2019 (all times are UTC)
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| 04:11 | <Tono> Hi, sorry to bother you guys, but is the app repo down? Updating the repo from the Ubuntu 18.04 guide just ends up with a 404 for [IP: 91.189.95.83 80].
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| 05:25 | <map7`> can I have both i386 & amd64 ltsp images installed on my server and direct some older clients to the i386 image and 64bit clients to the amd64 image?
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| 05:25 | could this just be done through lts.conf?
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| 05:30 | <alkisg> map7`: for the first question yes, for the second, no, it needs to be done before lts.conf gets loaded, e.g. from dnsmasq.conf or boot.ipxe
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| 05:30 | And, without a question: why don't you use a single i386 image for all clients?
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| 05:32 | <map7`> alkisg: that's what I do now (under Debian Jessie) but I want to install a more recent kernel than 3.16 for drivers for the Intel 620
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| 05:32 | <alkisg> You can surely do that
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| 05:33 | <map7`> and everytime I do this under the 32bit image it doesn't boot the latest kernel
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| 05:33 | <alkisg> Why change the arch, instead of just installing a new kernel?
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| 05:33 | <map7`> it still boots the old 3.16
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| 05:33 | <alkisg> OK,let's fix that part then
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| 05:33 | Are you using a chroot?
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| 05:33 | <map7`> i thought 32bit is being dropped from the kernel, is this true?
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| 05:33 | <alkisg> No
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| 05:33 | <map7`> yes I'm using chroot
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| 05:34 | I need kernel 4.9 for the new GPU
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| 05:34 | it's in backports
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| 05:34 | <alkisg> My schools use ubuntu 18.04 32bit with 4.15 kernel
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| 05:34 | You can surely use that kernel then
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| 05:34 | <map7`> ah cool
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| 05:36 | ok well I have cloned my server to a test rig which I can practice with
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| 05:36 | and redirected my DHCP to point to the test rig to boot thin clients
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| 05:37 | <alkisg> Normally, you just install the new kernel to the chroot and run ltsp-update-image
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| 05:37 | <map7`> yes I've tried this but it still boots the old kernel
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| 05:37 | <alkisg> This will get you two kernels, both 3.x and 4.x; later on you can remove 3.x if you want to
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| 05:37 | So, at the point where you see any issues, ping me
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| 05:37 | To help you troubleshooting
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| 05:38 | <map7`> ok cheers, I'll go through it on my testrig and let you know, thanks mate
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| 05:38 | <alkisg> np
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| 05:39 | <map7`> I have 'linux-image-4.9.0-0.bpo.3-686' or 'linux-image-4.9.0-0.bpo.3-686-pae' packages in backports
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| 05:39 | which one should I be installing?
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| 05:40 | <alkisg> Well if ALL your clients have < 4 GB RAM, you could install the non-pae one, but in general, just go for the pae one
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| 05:40 | PAE allows clients to see more than 4 GB RAM for a tiny performance cost
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| 05:41 | <map7`> ok, well the new thin client has 8GB or ram so I'll install pae, thanks
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| 05:44 | <alkisg> Hi Tono, what host are you talking about? The greek schools ppa, hosted by launchpad?
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| 05:44 | It works fine here
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| 05:46 | <Tono> Running 'add-apt-repository --yes ppa:ts.sch.gr'
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| 05:46 | then 'apt update'
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| 05:47 | <alkisg> Tono: can you paste the whole output?
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| 05:47 | Put it to pastebin, for both commands
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| 05:47 | !paste
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| 05:47 | <ltsp> 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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| 05:48 | <Tono> http://paste.debian.net/1076627/
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| 05:48 | ah shoot, I forgot the first command
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| 05:49 | <Tono> http://paste.debian.net/1076628/ here's the first one
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| 05:49 | <alkisg> Tono: cosmic
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| 05:50 | LTSP doesn't really support non-LTS Ubuntu releases
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| 05:50 | Use 18.04, bionic instead
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| 05:50 | <Tono> Ah, that would make sense
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| 05:51 | <alkisg> You could test without the PPA, but it would be an unsupported ltsp version, that doesn't receive updates etc
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| 05:53 | <Tono> I actually tried that earlier, but installing in chroot mode ended with the installation ending abnormally.
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| 05:54 | E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/x/xorg-docs/xorg-docs-core_1.7.1-1.1_all.deb Undetermined Error [IP: 91.189.88.161 80]
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| 05:54 | was the final error
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| 05:55 | <alkisg> You tried installing ltsp in cosmic without the ppa, and it failed?
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| 05:55 | That file does seem to be there, so it sounds like a temporary networking issue?
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| 05:55 | <Tono> Yes
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| 05:55 | Hmm, I guess I'll try it again
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| 05:56 | <alkisg> Tono: but I'd really advice against it
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| 05:56 | As an ltsp developer and the person maintaining ltsp in ubuntu... I say, avoid it :D
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| 05:56 | <Tono> Hahaha
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| 05:56 | <alkisg> Why do you want to test cosmic instead of bionic?
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| 05:57 | (which will actually get you an OLDER ltsp?)
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| 05:57 | <Tono> Its just what my server was running, figured I give it shot
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| 05:57 | <alkisg> Eeew, servers with non LTS versions?
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| 05:57 | Those are supported for 9 months only
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| 05:57 | Is your server disposable? :P
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| 05:57 | <Tono> Pretty much disposable haha
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| 05:58 | <map7`> alkisg: Ok I've installed the 4.9 kernel, done a ltsp-update-kernels and ltsp-update-image, then booted the thin client and when I check the 'uname -a' through the 'ltsp-localapps xterm' it shows as 3.16 still
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| 05:58 | <Tono> I think I'll take the chance to move it to lts, but I was looking forward to 19.04..
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| 05:58 | <alkisg> Tono: 19.04 will still have an older ltsp than 18.04 :)
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| 05:58 | <alkisg> map7`: ls -l /var/lib/tftpboot/ltsp/i386 => pastebin
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| 05:58 | And the contents of pxelinux.cfg/default
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| 05:59 | <map7`> tftpboot dir: https://pastebin.com/jVpLbBvc
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| 06:00 | <Tono> Alkisig, I never really thought about newer versions having older versions of software, but it makes a lot of sense since theres less support...
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| 06:00 | <map7`> pxelilnux.cfg/default https://pastebin.com/y4vkVYfY
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| 06:01 | The new kernel doesn't seem to be listed in the default grub menu
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| 06:01 | my mistake it is half way down
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| 06:03 | <alkisg> map7`: strange, it's sorted below instead of on top. Temporarily, modify pxelinux.cfg/default manually, to put it as 'DEFAULT',
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| 06:03 | when you see that everything works, just remove the older kernels; it'll be first then as it'll be the only one
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| 06:05 | <alkisg> E.g. default ltsp-NFS-4.9.0-0.bpo.7-686-pae and ontimeout ltsp-NFS-4.9.0-0.bpo.7-686-pae
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| 06:05 | <alkisg> Just modify lines 4 and 5
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| 06:05 | <map7`> ok
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| 06:06 | is that it and just reboot my thin client?
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| 06:07 | <alkisg> Yup
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| 06:07 | <map7`> hmmm, I get the same result. The thin client booted 3.16.0-4-586
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| 06:08 | <alkisg> Can I see?
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| 06:08 | !vnc-dide
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| 06:08 | <ltsp> vnc-dide: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect srv1-dide.ioa.sch.gr - this is a reverse connection, it doesn't need port forwarding etc.
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| 06:08 | <alkisg> (the server)
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| 06:11 | <map7`> I'm logged in through x2goclient to the server isn't there a slightly different command I have to use?
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| 06:11 | <alkisg> Add -noshm
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| 06:11 | x11vnc -noshm -connect srv1-dide.ioa.sch.gr
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| 06:13 | <map7`> just one sec
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| 06:19 | alkisg: ok it's up
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| 06:22 | alkisg: I'm not running DHCP on that server
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| 06:23 | <alkisg> map7`: try rebooting the client
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| 06:23 | You have tftpd-hpa with 2 tftp roots
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| 06:23 | One in /var/lib/tftpboot and one in /srv/tftp
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| 06:23 | Delete one of them. LTSP normally uses /var/lib/tftpboot
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| 06:23 | So you had to modify /srv/tftp/...pxelinux, not /var/lib...pxelinux
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| 06:24 | <map7`> oh ok
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| 06:24 | just rebooting now
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| 06:24 | it's dropped me at BusyBox
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| 06:24 | Could not load neither overlayfs nor aufs
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| 06:26 | <map7> alkisg: I've got a VM PXE client so you can see it boot there
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| 06:26 | alkisg: in virt-manager
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| 06:26 | <alkisg> map7`, I think debian has had some issues with nfs with the 4.x kernels
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| 06:27 | I think they were partially resolved later on with ltsp AND kernel updates
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| 06:27 | So I think debian has switched to nbd, to workaround that issue
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| 06:27 | I did try nfs a while ago with kernel 4.15 in ubuntu and i did push some ltsp changes to make it work,
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| 06:27 | <map7> alkisg: Should I switch to nbd?
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| 06:27 | <alkisg> but I'm not testing debian, vagrantc is...
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| 06:28 | Switching to nbd sounds like a good idea, yes
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| 06:28 | Although I'm worried about that overlay message
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| 06:28 | Aufs did get deprecated, but overlay should work fine since 5-6 years now
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| 06:28 | <map7> Is it easy to switch to nbd?
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| 06:29 | <alkisg> It should involve ltsp-update-image and ltsp-config nbd-server, but I really wouldn't want to spend time in troubleshooting old debian releases, so I'm not sure I'll be able to help you there
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| 06:32 | <map7> alkisg: Should I give nbd a go?
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| 06:32 | <alkisg> What are your options?
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| 06:32 | <map7> this is just a test rig
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| 06:32 | <alkisg> Ah sure then, go ahead
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| 06:38 | <map7> alkisg: I booted my thin client and it now boots but it's still on 3.16
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| 06:38 | how do I check that it's booting through nbd?
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| 06:39 | <alkisg> map7, cat /proc/cmdline
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| 06:39 | But every time you run ltsp-update-image, pxelinux/default get re-created
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| 06:39 | So you need to re-edit it
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| 06:39 | and select the 4.9 nbd entry from there
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| 06:39 | <map7`> ok
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| 06:41 | <alkisg> Remember to edit /srv/tftp, not /var/lib/tftpboot...
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| 06:42 | <map7`> ah thanks
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| 06:43 | alkisg: I get the overlayfs message again
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| 06:43 | <alkisg> Is there a newer ltsp in backports?
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| 06:43 | If not, maybe you can't use 4.x kernels in jessie, you'd need to ask vagrant
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| 06:43 | Ah maybe he's here, vagrantc? ^
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| 06:49 | <map7> yes there is a more recent version of ltsp in backports
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| 06:49 | 5.5.8
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| 06:50 | <alkisg> OK, try that one
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| 06:50 | In the chroot, mostly
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| 06:50 | <map7> ok, should I also install it on the server side?
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| 06:50 | <alkisg> Generally, yes; in this case I'm not sure it matters
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| 06:55 | <map7`> alkisg: That worked!
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| 06:55 | I'm on kernel 4.9!!!
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| 06:55 | <alkisg> Great!
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| 06:55 | <map7`> alkisg: Thanks again,
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| 06:55 | now should I remove the /srv/tftp directory
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| 06:56 | <alkisg> map7`, you'll also need to update your tftpd-hpa configuration for that
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| 06:56 | And point it to /var/lib/tftpboot
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| 06:59 | <map7> alkisg: Can I stop the VNC session now
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| 06:59 | <alkisg> Sure
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| 06:59 | Ctrl+C
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| 15:38 | <deepanshuG> hello
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| 15:38 | vagrantc are you here?
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| 21:01 | <mnevans> Hello LTSP world. I just updated my ltsp server to latest debian 9 upgrades, and my client displays go dark. To be specific, I get a login screen,
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| 21:02 | choose a window manager (XFCE was fine before), then the display goes dark, and there's nothing to do but reboot.
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| 21:03 | I can get a failsafe terminal connection. Where should I look for login information?
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| 21:03 | My problem is you all did too well with ltsp, it just works and it has been so long since I had to troubleshoot, I've forgotten where to start!
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| 21:03 | ...and thanks in advance for suggestions.
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| 21:04 | FWIW, I upgraded the server. Then the ltsp installation via ltsp-chroot. Then ltsp-update-clients. Then a reboot. I might try another full system reboot.
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| 21:10 | ...And problem solved with just the server reboot. We will probably be good for another 2 years or more of uptime... Thanks for listening!
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| 21:10 | Love LTSP.
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