IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 16 November 2012 (all times are UTC)
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| 07:34 | <jimjimovich> has anyone experienced terminals not working because of network card errors? some of my terminals randomly throw read errors on the squashfs file system ... I was wondering if it's not a bad network card.
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| 07:40 | Anyone have a fix for flash drives on ltsp-pnp thin clients
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| 17:44 | <blakes> Does anyone have a suggested link or information about how to set up a server so that either 32 or 64 bit thin clients get their appropriate image? I am slowly migrating older i386 machines to newer amd64 boxes.
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| 17:45 | <||cw> blakes: you set the dhcp/PXE to give the right image.
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| 17:45 | I don't know if pxelinux.cfg has a way to change default based on client arch, though I'd imagine it does
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| 17:46 | <blakes> I figured that, but I was hoping to find some examples.
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| 17:46 | <||cw> I'd start in the pxelinux docs
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| 18:07 | <alkisg> blakes: the newest ltsp versions have code that uses ifcpu from pxelinux to autodetect 32/64 bit support
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| 18:07 | If you're using debian wheezy or ubuntu 12.10 you could see examples in $TFTP/ltsp/i386/pxelinux.cfg/*
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| 18:08 | Or google for "kernel ifcpu64.c32"
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| 18:20 | <blakes> alksig:using 12.04... but wouldn't "$TFTP/ltsp/i386/pxelinux.cfg/default be too late in the boot process? What I mean is doesn't the amd64 thinclient have to tell the server it wants to download $TFTP/ltsp/amd64/pxelinux.cfg/default? And would that be in the dnsmasq config?
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| 18:21 | <||cw> I'm really not sure why the whole tftp is split up by arch, there's nothing wrong with mixing x86 and x64 in the same pxelinux.cfg
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| 18:27 | <alkisg> blakes: no, it's not too late, pxelinux.0 + pxelinux.cfg is the proper point to decide which kernel to load, the support in ltsp for this has been tested + committed
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| 18:27 | +released in debian wheezy and ubuntu 12.10
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| 18:27 | <alkisg> With dnsmasq you'd have to do that based on the client mac, dnsmasq has no way to detect the client arch
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| 18:28 | <blakes> So does the AMD kernel need to be in the i386 directory... or a symlink?
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| 18:28 | <alkisg> You can even point clients to different chroots with pxelinux cfg
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| 18:28 | <alkisg> /opt/ltsp/i386, /opt/ltsp/amd64, and similar for tftp
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| 18:29 | Just out of curiosity though, why bother with amd64 if you have mixed clients?
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| 18:29 | <blakes> I get it..... so you know of any examples of this configuration? your kernel ifcpu64.c32 search wasn't that helpful
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| 18:29 | <alkisg> The default -pae kernel can access up to 64 Gb RAM...
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| 18:30 | I don't know how many of these apply to 12.04, but:
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| 18:30 | <blakes> alkisg: I want to the 64 bit machines to work in a lab where a programming class can use 64bit libraries and so on.
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| 18:30 | <alkisg> update-kernels.conf: #IFCPU64=true => uncomment
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| 18:31 | PXELINUX_DEFAULT=ltsp-ifcpu64-NBD
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| 18:32 | ...make sure your chroot has /usr/lib/syslinux/ifcpu64.c32,
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| 18:32 | And here's the new ltsp update-kernels code:
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| 18:32 | label ltsp-ifcpu64-$method
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| 18:32 | menu label LTSP, using $method, Autodetect 64-bit, PAE or 32-bit kernels
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| 18:32 | kernel ifcpu64.c32
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| 18:32 | append ltsp-$method-64 -- ltsp-$method-PAE -- ltsp-$method-32
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| 18:32 | Man page is here: http://www.syslinux.org/wiki/index.php/Ifcpu64.c32
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| 18:33 | So basically if 12.04 supports that (don't remember), you just edit update-krenels.conf, otherwise you put manual entries
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| 18:34 | blakes: if it's for a different lab, I guess it would be good to list the lab MACs in dnsmasq.conf
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| 18:34 | <blakes> :-) thanks TONS!! That sort of makes sense, and can do.
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| 18:34 | <alkisg> So from there you can just send a different boot filename
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| 18:36 | <blakes> So I guess I had a different understanding of how the tftp boot process works.
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| 18:39 | the only update-kernels.conf is in the chroot(s)... so either i need to add it to the server or... wait .... does the thin client decide the kernel AFTER the user logs in?
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| 18:42 | <alkisg> blakes: that's the one... it's a bit hard to explain how that affects /var/lib/tftpboot/ltsp/i386/pxelinux.cfg, but it does
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| 18:42 | <wicksey> We've got 12.04.1 running ltsp really nicely. It's gone very well and is working like a dream across 32 fat clients and 32 thin clients. We bought 32 'identical' machines and using them as fat clients. Most show 1280x960 but a small handful show 1024x768. Weird. Where do I start with that? lspci shows the same output.
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| 18:42 | <alkisg> (first it affects $CHROOT/boot and then the result gets copied to TFTP)
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| 18:43 | wicksey: different monitors or connectors? (e.g. dvi vs vga)
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| 18:43 | <wicksey> No. That's the weird thing. 32 identical boxes, monitors and method of connecting (vga into a digital adaptor)
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| 18:44 | <alkisg> wicksey: put /var/log/Xorg.0.log in pastebin, from both cases, working + not
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| 18:44 | (client side)
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| 18:45 | <wicksey> Will do. I'll have a look through that log on Monday and post it up if it doesn't reveal anything obvious I can fix. Thanks.
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| 18:48 | In other news, I worked around the shutdown fat client hanging bug by editting the source code of ldm and compiling to .deb. I'd never done that before so thanks for the help.
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| 18:49 | (I understand it might leave nbd connections open etc. but it's so much better for now.)
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