IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 12 March 2020 (all times are UTC)
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| 09:14 | <meo> alkisg: how would I maintain a separate kernel version over the same image for a set of clients?
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| 09:15 | <alkisg> meo: does that other kernel receive updates?
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| 09:16 | <meo> alkisg: no, the problem I described earlier (some clients fail mid-boot because they cant initialize the NFS) is specific to some cards in kernel 5.3.x, but works ok under 5.0.0
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| 09:16 | I will trace down exactly which cards and kernel versions but now I'd like to group the clients
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| 09:17 | <alkisg> First of all you'll have both kernels installed. Then, you'd copy the second kernel to a different tftp dir, e.g. /srv/tftp/ltsp/special-kernel/vmlinuz,initrd.img
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| 09:18 | Then you'd symlink /srv/ltsp/images/special-kernel.img to x86_64.img
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| 09:18 | Then you'd put special KERNEL_PARAMETERS for these clients, and run ltsp ipxe
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| 09:18 | Hmm not special KERNEL_PARAMETERS, sorry, special DEFAULT_IMAGE
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| 09:19 | <alkisg> (or maybe it's just IMAGE, not DEFAULT_IMAGE, need to look it up)
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| 09:20 | It's DEFAULT_IMAGE
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| 09:21 | It's also possible to automate the "copy the second kernel" by using the KERNEL_INITRD parameter, but it's not a big deal if it's not regularly updated
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| 09:22 | <meo> let me dig in, I remember looking in squashfs images yesterday and seeing several kernels
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| 09:24 | <alkisg> If you need professional support over VNC to finish this in a few minutes... you know the way :)
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| 09:31 | <meo> it's another physical site, I need to figure it out first
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| 10:36 | <meo> alkisg: I figured out the configuration, doing a test right now
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| 10:38 | <alkisg> Great
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| 10:41 | <meo> huh, ipxe cant load the new image from tftp, do I need to restart it or something
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| 10:42 | oh
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| 10:42 | im stupid nvm
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| 10:42 | i just put the image to /srv/ltsp/images and expected it to work..
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| 10:55 | <meo> alkisg: okay it works nicely, just need to run ltsp kernel too
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| 10:55 | <meo> I suspect in fact that I could use the same base image and just the separate kernel configured, because this is clearly a kernel problem
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| 11:00 | ok more specifically this is a rtl8111 problem introduced in 5.3
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| 11:23 | <alkisg> meo: in my instructions above, I told you to use a symlink, i.e. the exact same image
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| 11:23 | Did we miscommunicate somehow?
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| 11:26 | <meo> alkisg: I made a copy of the image because the working one was the .old one and I didnt want to lose it on next ltsp image
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| 11:26 | <alkisg> You didn't need to run ltsp image at all..
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| 11:26 | But anyways, now you only maintain one image, right?
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| 11:26 | <meo> alkisg: I know that now, this is what happens when I read too fast
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| 11:26 | alkisg: I will, now that I figured out how the kernel selection works
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| 11:27 | <alkisg> np, as long as the best solution is found, it's ok to have a few wrong steps in the road ahead :)
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| 11:27 | <meo> but really what I need to do here is to rebuild with realtek proprietary drivers
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| 11:27 | <alkisg> Eh, not sure I'd trust realtek more than the kernel maintainers :D
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| 11:27 | I've read their code... :D
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| 11:28 | <meo> the very reason I started down this road is because other realtek cards I have in that setup (non-8111) have a flaky connectivity under 5.0.0 and some of them are forced into 100Mbps mode
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| 11:28 | bear in mind these workstations are easy 10 year old
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| 11:29 | * alkisg has only seen forced 100 mbps mode when there were bad cabling issues | |
| 11:29 | <alkisg> E.g. realtek there claimed to work in gigabit, and produced lots and lots of errors,
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| 11:29 | while intel there synced in 100 mbps and worked fine
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| 11:29 | <meo> there *are* cabling issues, but in this case it's about the driver power management, I made a fresh cable by hand and ran it directly to the switch - same thing
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| 11:29 | <alkisg> Then I fixed the wall socket and everything was fine with any adapter
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| 11:30 | OK
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| 11:34 | <markit> alkisg: hi, private msg for you :)
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| 11:34 | <alkisg> Hi markit, reading...
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