IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 24 May 2016 (all times are UTC)
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| 00:37 | <XoMeLLyoX> Can someone help me? I am changing the resolution in lts.conf but the thin client doesn't seem to be picking it up. Am I doing something wrong?
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| 00:41 | Maybe I'm not editing the right file? Which lts.conf should I be editing? /opt/ltsp/i386/etc/lts.conf or /var/lib/tftboot/ltsp/i386/lts.conf?
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| 00:43 | <vagrantc> the one in tftpboot
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| 00:43 | presuming your tftp server is serving tftpboot
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| 00:44 | it might also be in /srv/tftp
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| 00:44 | <XoMeLLyoX> There is a lts.conf in /srv/tftp
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| 00:46 | You nailed it. It was the one in /srv/tftp
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| 03:34 | <tsylvermane> is there a recommended enviroment for an ltsp client. gnome, kde, xfce? something like that?
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| 03:52 | <gehidore> whatever runs best on the machine doing the processing I would think
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| 04:51 | <alkisg> !ubuntu-mate
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| 04:51 | <ltsp`> ubuntu-mate: Ubuntu-mate works very well with LTSP, even with older clients. Download the 64-bit version if *all* your clients have >= 2GB RAM, otherwise download the 32-bit version. http://ubuntu-mate.org/download/
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| 04:51 | <alkisg> tsylvermane: ^
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| 04:52 | If you have crashes and hangs etc, check the hardware and network, check dmesg, syslog, try a local os installation etc
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| 04:55 | sbalneav: https://en.wikipedia.org/wiki/DebConf ==> DebConf17 2017 Montreal, Canada
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| 04:55 | Let's make that an LTSP meeting as well!!!
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| 04:55 | vagrantc: ^
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| 06:14 | <rac_> i have problem save as libreoffice file, when i open file and after edit file can't save, the system not respone
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| 06:15 | can help me ?
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| 06:38 | <vagrantc> sbalneav: yeah, montreal is right next door, hopefully you can make that? :)
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| 06:39 | <rac_> i have problem save as file in libreoffice on ubuntu 16.04,
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| 06:39 | some files can not be saved after editing the file,
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| 06:39 | the system not responding there can help me
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| 06:40 | can help me ?
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| 06:41 | <vagrantc> no idea how to help with that, never seen anything like it
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| 14:11 | <sebd> Hello, I have a perfectly thin client setup on debian 8 (kernel 3.16.7). I want to try current kernel from backports.org in order to rule out one possible cause of a LibreOffice graphical bug.
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| 14:12 | but kernel 4.5.3 fails to boot and starts Busybox
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| 14:13 | It says it cannot load overlayfs nor aufs.
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| 14:14 | I guess these two modules are no more included in the initrd.
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| 14:16 | <sbalneav> Newer versions of overlayfs do not work with NFS, and aufs has been removed from the kernel.
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| 14:17 | Always nice of the kernel developers to break the new things, and remove the older, working things before the new things work correctly.
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| 14:18 | <sebd> sbalneav: how is ltsp currently working in debian testing / unstable ?
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| 14:19 | <sbalneav> Not sure. I've been busy developing the stuff we need for ltsp6 (pam modules, greeters, etc), and haven't been paying attention to the distro related stuff.
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| 14:19 | vagrantc would be the fellow to ask on that.
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| 14:19 | <sebd> what is the latest LTSP-friendly kernel ?
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| 14:19 | <ogra_> i dont think aufs was ever in any mainline kernel ...
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| 14:20 | <sbalneav> I'm using debian lenny, in production, so whatever comes with that.
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| 14:21 | https://lists.debian.org/debian-kernel/2015/08/msg00162.html
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| 14:21 | fyi
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| 14:23 | <sbalneav> Morning ogra_
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| 14:23 | <ogra_> yo
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| 14:30 | <sebd> I am not even using NFS anymore, but NBD - but I guess that still needs overlayfs
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| 15:06 | <alkisg> sebd: do you get an initramfs shell? does `modprobe overlayfs; grep overlay /proc/filesystems` work there?
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| 15:07 | <sebd> let's try ...
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| 15:08 | alkisg: modprobe: module overlayfs not found in modules.dep
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| 15:09 | alkisg: no overlay in /proc/filesystems
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| 15:09 | <alkisg> sebd: what about "modprobe overlay"?
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| 15:10 | <sebd> alkisg: not found neither
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| 15:10 | <alkisg> And `uname -a` says 4.5.3?
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| 15:11 | If I remember correctly, overlay should be in all kernels >= 3.18
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| 15:11 | <sebd> alkisg: yes 4.5.3-2~bpo8+1
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| 15:11 | <alkisg> So it doesn't make much sense to have 4.5 without overlayfs included...
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| 15:13 | sebd: is this the one? https://packages.debian.org/jessie-backports/i386/linux-image-4.5.0-0.bpo.2-686/filelist
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| 15:14 | That one does have overlayfs
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| 15:14 | <sebd> alkisg: no, the amd64 one
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| 15:15 | <alkisg> That one also has overlayfs: https://packages.debian.org/jessie-backports/amd64/linux-image-4.5.0-0.bpo.2-amd64/filelist
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| 15:15 | Let's see if it was included in the initramfs or not...
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| 15:16 | sebd: on the server: ls /opt/ltsp/amd64//lib/modules/*/kernel/fs/overlayfs/overlay.ko
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| 15:16 | and in the initramfs: ls /lib/modules/*/kernel/fs/overlayfs/overlay.ko
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| 15:17 | If it's not included, you need a newer ltsp (or a few backported scripts) that take care of including the overlay to the initramfs
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| 15:17 | Maybe you can download and dpkg -i the ltsp-client-core-amd64.deb from stretch
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| 15:18 | <sebd> alkisg: first file is present (in the chroot) ; let's check in the initramfs
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| 15:19 | <alkisg> find /lib -name overlay.ko should also do
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| 15:20 | <sebd> it is not included in the initramfs
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| 15:20 | <alkisg> sebd, ok, can you try installing the ltsp-client-core package from stretch?
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| 15:21 | Download this: https://packages.debian.org/stretch/amd64/ltsp-client-core/download
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| 15:21 | copy it to the chroot, then run `ltsp-chroot` to enter the chroot, and run `dpkg -i linux-xx.deb`
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| 15:22 | <sebd> I'd rather not replace stable debian LTSP, but I would agree on modifying a initrd-building config file
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| 15:22 | <alkisg> OK, you'll need both the hook and the script
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| 15:23 | In the chroot: /usr/share/initramfs-tools/hooks/ltsp
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| 15:23 | And probably also this: /usr/share/initramfs-tools/scripts/init-bottom/ltsp
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| 15:23 | <sebd> ok
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| 15:24 | <alkisg> Then, in the chroot again, `update-initramfs -u`, and outside it, `ltsp-update-kernels`
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| 15:24 | But the difference from ltsp 5.5. to ltsp 5.7 is mostly about bug fixes, and it's easy to revert to the older package (with apt install ltsp-client-core=stock-version)
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| 15:26 | I think vagrantc just needs some motivation to upload ltsp 5.5.7 to jessie-backports, so if I were you, I'd ping him ;)
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| 15:36 | <sebd> alkisg: you won ! It works. I patched these two files by hand and it works !
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| 15:36 | <alkisg> Nice! But we've already won months ago by fixing it in ltsp-upstream :P :D
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| 15:36 | <sebd> I understand newer kernels provide module overlay instead of overlayfs
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| 15:37 | <alkisg> overlayfs is the name ubuntu used until it got mainlined
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| 15:37 | Now ubuntu supports both; debian never had "overlayfs"
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| 15:38 | <sebd> mmm but my LibreOffice bug still occurs on latest kernel.
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| 15:39 | <alkisg> What libreoffice bug?
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| 15:40 | <sebd> alkisg: on some text documents, select the whole text using the mouse (not Ctrl+A), then with the mouse select a different font.
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| 15:40 | <sebd> from then, LibreOffice stops updating its window contents
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| 15:40 | doing the same using keyboard shortcuts do not break LibreOffice.
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| 15:40 | Mouse usage breaks it.
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| 15:41 | <alkisg> sebd: I'd try a stretch live usb stick on the client first, to see if it's solved or not
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| 15:41 | <sebd> It only happens on these thin clients
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| 15:41 | ok I'll try that
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| 15:42 | alkisg: no, I know it does not happen on normal PCs. It only happens on these thin clients.
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| 15:43 | <alkisg> sebd: on these thin clients, is it fixed in stretch? That's what I'd test if I were you
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| 15:44 | <sebd> mmm
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| 15:55 | <alkisg> If it's only happenning with remote X, one easy way to reproduce is `ssh -X some-other-pc`
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| 15:55 | Or even `ssh -X localhost`, in some cases
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| 16:07 | <sebd> ok it is not only happening with thin clients. Same PCs started as fat clients show the same behaviour.
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| 16:08 | now it is too late, I must go home, I'll try something else tomorrow.
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| 16:08 | <sbalneav> Sounds to me like missing donts.
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| 16:08 | *fonts
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| 16:08 | <sebd> btw, it does not occur through X2Go.
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| 16:08 | sbalneav: good Idea, I'll look into that.
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| 17:01 | <sbalneav> vagrantc: libpam-external's at the point (right now) where it's good enough for someone to look at.
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| 17:02 | I did a login on my thin client this morning with it, using my python sshauth script :D
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| 17:02 | Which I was pretty happy about.
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| 17:12 | <vagrantc> sbalneav: ok, i'll try digging around
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| 17:12 | <sbalneav> thx.
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| 17:13 | <vagrantc> exciting times!
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| 17:14 | sbalneav: that's all pushed to the repositories at: https://code.launchpad.net/~ltsp-upstream/+git/ ?
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| 17:16 | <sbalneav> Yup yup
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| 17:16 | Last update a few hours ago
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| 17:16 | It's *even* got a manpage!
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| 17:16 | I'm just that sexy.
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| 17:18 | <Leolo_2> vagrantc - I can't get nbd 3 working on CentOS 6
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| 17:18 | is there any help on debugging?
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| 17:19 | <vagrantc> sbalneav: include the GPL somewhere :)
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| 17:19 | Leolo_2: what version of NBD is it?
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| 17:19 | <Leolo_2> latest git
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| 17:19 | <vagrantc> Leolo_2: what's that?
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| 17:20 | <Leolo_2> 3.13
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| 17:20 | <sbalneav> It's got a COPYING file :D
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| 17:20 | It's licenced as "gpl 2 or later at your preference"
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| 17:21 | <vagrantc> sbalneav: i don't see any copying file in git.
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| 17:22 | <sbalneav> Why would I include it when it gets auto-copied in by the autoreconf?
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| 17:22 | <vagrantc> sbalneav: if you could include a one or two-liner copyright and license in src/pam_external and man/pam_external.8 and the copy of the copyright, that would be great.
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| 17:23 | sbalneav: the COPYING file comes from autoreconf?
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| 17:23 | <sbalneav> yeah
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| 17:23 | <vagrantc> huh.
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| 17:23 | <sbalneav> That's why I don't include it. Why maintain it in git?
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| 17:24 | I've got copyright headers in the C files themselves, and I could add a line or two in the .8
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| 17:24 | git clone, and do the ./autogen, you'll get the COPYING file.
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| 17:25 | <vagrantc> so, depending on my version of autotools, i might get a different license? :)
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| 17:25 | <sbalneav> Well, what's debian best practice? Should I have the copying in the git repo?
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| 17:25 | I mean I don't mind if that's what I *should* do...
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| 17:26 | <vagrantc> sbalneav: but at any rate, the copyright headers in the C files are great. just to avoid any ambiguity, it'd be nice to have the pam_external.h and pam_external.8 have explicit mention of the author and coypright terms
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| 17:26 | <sbalneav> ok, I can do that too.
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| 17:26 | <vagrantc> er, copyright and license terms
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| 17:26 | sbalneav: thanks!
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| 17:26 | sbalneav: i'll ask about the COPYRIGHT file
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| 17:27 | <sbalneav> uno momento, por favor
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| 17:28 | I guess, from my point of view, what I want in the git repo is the stuff I actually authored, not boilerplate stuff like the COPYING file that I'm never gonna touch. That's my reasoning for not adding it, personally.
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| 17:28 | <vagrantc> the only reason i mention COPYING included in git is the git repository actually then includes all the necessary licensing information.
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| 17:29 | <sbalneav> Yeah, I can see it both ways.
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| 17:30 | Find out what the debian people would prefer, and I'm happy to conform to best practices.
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| 17:30 | <vagrantc> sbalneav: asking now
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| 17:31 | in general, with licensing, expliciy is almost always better than implicit.
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| 17:32 | sbalneav: well, one response so far is to ship it in git
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| 17:32 | <sbalneav> good enough
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| 17:33 | <vagrantc> then there's no doubt which license you're referring to
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| 17:34 | sbalneav: at this stage in the game, i wonder if GPLv3 wouldn't be worthwhile
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| 17:34 | <sbalneav> My source is 2+. I'm including 3. Do you want me to change to 3+?
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| 17:34 | I'm fine with 3
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| 17:34 | <vagrantc> great minds question alike :)
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| 17:34 | <sbalneav> ok, gimme a few, I'll move everything to 3, add the manpage copyright.
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| 17:34 | <vagrantc> yeah, i'd go with 3, it resolves some major legal issues, like the termination clause.
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| 17:36 | sbalneav: i think there's also updated boilerplate license terms for the GPLv3
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| 17:36 | <sbalneav> got it handy?
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| 17:37 | * vagrantc reads the GPL-3 | |
| 17:37 | <vagrantc> sbalneav: near the bottom of /usr/share/common-licenses/GPL-3
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| 17:38 | sbalneav: includes crazy modern things like a URL instead of a mailing address
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| 17:39 | <sbalneav> GASP
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| 17:46 | vagrantc: ok, check it out now. Should be a COPYING file included, source with GPL 3, and a copyright section in the manpage.
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| 18:04 | <Leolo_2> so, nbd-client is passing the socket to nbd.ko fine. nbd.ko is receiving the read request fine. kernel_sendmsg is returning fine
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| 18:04 | but nbd-server is never receiving the data
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| 18:05 | * vagrantc states the obvious: | |
| 18:05 | <vagrantc> firewall?
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| 18:05 | <Leolo_2> iptables -L -n is empty
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| 18:05 | <vagrantc> nbd 10809/tcp # Linux Network Block Device
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| 18:05 | hrm.
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| 18:06 | <Leolo_2> also, if the firewall was a problem, wouldn't I get an error long before I can hand the socket to nbd.ko
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| 18:06 | <vagrantc> Leolo_2: if you run nbd-client from the server to localhost, does it work?
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| 18:07 | <Leolo_2> I'm running it from the server, but not via localhost, but via the eth1 (aka 10.30.0.49)
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| 18:07 | <vagrantc> using a named export?
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| 18:07 | sbalneav: thanks for all the licensing updates! :)
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| 18:07 | <sbalneav> np
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| 18:07 | <Leolo_2> yes, named export
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| 18:08 | nbd-client reports success
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| 18:08 | <sbalneav> I'll update the licenses on libnss-external too.
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| 18:08 | <Leolo_2> I can see nbd.ko getting the socket via kernel debugging
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| 18:09 | where does nbd-server's allow list live again?
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| 18:09 | <vagrantc> whereever you tell it to
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| 18:09 | i don't think it has one hard-coded
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| 18:11 | <Leolo_2> found it
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| 18:11 | ok, 127.0.0.1 also hangs
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| 18:11 | !pastebin
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| 18:11 | <ltsp`> pastebin: try !paste
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| 18:11 | <Leolo_2> !paste
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| 18:11 | <ltsp`> paste: the LTSP pastebin is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebin, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
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| 18:13 | <Leolo_2> http://pastebin.com/0Hb3D8aw
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| 18:13 | * vagrantc wishes the bot could understand aliases | |
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| 18:18 | <Leolo_2> know what I find wierd? that NBD_SET_SOCK is handing an fd to nbd.c
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| 18:19 | nbd.ko is then doing fget(arg); so I assume that's smart enough to turn a processe's fd into a sane stuct file*
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| 18:20 | <sbalneav> fdopen does that.
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| 18:21 | <Leolo_2> fdopen?
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| 18:22 | nbd.ko never calls fdopen
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| 18:22 | nor does nbd-client
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| 18:22 | <sbalneav> I'd have to look at the source.
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| 18:24 | It does a sockfd_lookup
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| 18:25 | https://www.fsl.cs.sunysb.edu/kernel-api/re539.html
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| 18:26 | <Leolo_2> fget does that ?
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| 18:27 | <sbalneav> nbd.ko does it.
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| 18:27 | http://lxr.free-electrons.com/source/drivers/block/nbd.c
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| 18:27 | <Leolo_2> know what? nbd.ko I'm using doesn't do that :-(
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| 18:28 | <sbalneav> Well, you'd have to look at the specific source for the nbd you're using.
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| 18:29 | <Leolo_2> https://raw.githubusercontent.com/comutt/linux-kernel-centos-2.6.32/master/drivers/block/nbd.c
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| 18:30 | but the really frustrating thing is that nbd 2.9 works !
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| 18:31 | so nbd.ko isn't the issue
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| 18:32 | <sbalneav> ok, according to your source, it's just pulling the information from the socket's inode entry.
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| 18:41 | <Leolo_2> shit, I'm looking at the wrong thing
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| 18:41 | sec
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| 18:41 | Request from=0 type=0 len=16384
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| 18:41 | I'm getting that in nbd-server
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| 18:41 | then I see (process:4471): GLib-CRITICAL **: g_thread_pool_push: assertion `real' failed
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| 19:02 | <Leolo_2> (process:4803): GLib-CRITICAL **: g_thread_pool_new: assertion `g_thread_supported ()' failed
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| 19:02 | and we now have an example of why excessive assertions are bad
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| 19:03 | <sbalneav> How's that bad?
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| 19:03 | https://developer.gnome.org/glib/stable/glib-Deprecated-Thread-APIs.html#g-thread-supported
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| 19:03 | <Leolo_2> I've learned over time that you can ignore GLib-CRITICAL assertions
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| 19:03 | <sbalneav> his macro returns TRUE if the thread system is initialized, and FALSE if it is not.
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| 19:03 | According to that, threads aren't initialized
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| 19:03 | <Leolo_2> "supported"
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| 19:04 | as in, it's using a fallback to pretend to have threads. but these threads are failing when I add_push
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| 19:04 | well, when nbd-server does the add_push
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| 19:04 | so no request can be handled, ever
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| 19:04 | <sbalneav> I'm just reading what the page I posted says.
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| 19:22 | <Leolo_2> yeah
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| 19:30 | wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo!
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| 19:30 | if I throw in g_thread_init(NULL); and -lgthread-2.0 it works !
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| 19:31 | <ogra_> it also breaks your "o" key it seems :)
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| 19:31 | <Leolo_2> :-)
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| 19:40 | <sbalneav> So, the macro was returning correct; the thread system wasn't initialized.
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| 19:42 | <Leolo_2> yes
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| 19:44 | g_thread_pool_new() was ignoring error returns
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| 19:50 | but even without the g_thread_init(), there is no error return
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| 20:15 | <bennabiy> vagrantc, alkisg: I will be moving back to NC next week, and will be having a little more time to put towards dev...
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| 20:16 | <bennabiy> alkisg, vagrantc: what is the best way to work on Documentation? I will be putting together my own little lab manual, and I thought I might be able to plug away at catching up the docs on the wiki or such
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| 21:40 | <Leolo_2> !source
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| 21:40 | <ltsp`> My source is at http://supybot.com/
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| 23:17 | <Leolo_2> configure.ac:242: error: required file 'man/nbd-client.8.sh.in' not found
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