Installing on Debian Sid

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29 Jul 2022 11:27 - 29 Jul 2022 11:38 #248610 by JT
Installing on Debian Sid was created by JT
I installed Debian Sid using my instructions here.

Then installed LinuxCNC using my instructions [/url] here.

When I checked the kernel I get
john@cave:~$ uname -a
Linux cave 5.18.0-3-amd64 #1 SMP PREEMPT_DYNAMIC Debian 5.18.14-1 (2022-07-23) x86_64 GNU/Linux

I've never seen SMP PREEMPT_DYNAMIC before and not sure how I got that... but the latency is horrible.


Edit: IIRC the first time I installed Sid then installed the rt kernel then installed LinuxCNC...

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Last edit: 29 Jul 2022 11:38 by JT.

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29 Jul 2022 11:53 #248612 by JT
Replied by JT on topic Installing on Debian Sid
Ok, I figured it out, the SMP PREEMPT_RT kernel was installed but not selected on boot up.

JT
The following user(s) said Thank You: tommylight

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29 Jul 2022 20:37 #248650 by rodw
Replied by rodw on topic Installing on Debian Sid
Great you worked it out. Maybe the DYNAMIC is something added in the later kernels. 5.18 is bleeding edge stuff!

I have installed Sid a few times in the past when it was the only branch that included the linuxcnc-uspace package. Its quite long winded because you have to upgrade to it in the absence of an ISO.

You should not need to install the PREEMPT_RT package using synaptic as its a dependency of linuxcnc-uspace. It should get installed with Linuxcnc.

When I did this, selecting preempt_rt for booting was not necsssary.

Also now linuxcnc-uspace is in Debian Bookworm (testing), its easiest to just grab its non-free version from the weekly builds
cdimage.debian.org/cdimage/unofficial/no...-including-firmware/

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