best realtime kernel for Master branch on Bookworm

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12 Nov 2023 20:30 #285196 by Roguish
Hey all.
Ok, just did full upgrade from bullseye to bookworm.
Installed the latest debs from buildbot2 (linuxcnc-uspace_2.10.0~pre0.2406.g095f7f0b4b_amd64.deb and the rest)
I've been running the 4.19.0-21-rt-amd   kernel.
Is there a newish one to use?  better maybe?   or at least a bit more current???

Thanks in advance.....

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12 Nov 2023 21:41 #285201 by tommylight
BookWorm will install 6.1 RT kernel when installing LinuxCNC, but that is 2.9 not 2.10.
You can remove 2.10, install 2.9 with
sudo apt update
sudo apt install linuxcnc-uspace
then remove 2.9 and install 2.10 using the deb.
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12 Nov 2023 22:31 #285211 by Roguish
thanks,
but which 6.1 kernel exactly?
using Synaptic, it's easy to find the rt kernels, especially with a long list of repositories.

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12 Nov 2023 22:33 #285212 by tommylight
cnc@NR200P:~$ uname -a
Linux NR200P 6.1.0-13-rt-amd64 #1 SMP PREEMPT_RT Debian 6.1.55-1 (2023-09-29) x86_64 GNU/Linux
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12 Nov 2023 22:35 #285213 by tommylight
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12 Nov 2023 22:37 #285214 by Roguish
thanks again.
and that one works OK ????
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12 Nov 2023 23:37 #285216 by tommylight
On all systems i have, it is better than 4.09 and 4.19, except on one laptop, so yes it is OK.
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14 Nov 2023 12:10 #285372 by rodw
I would only consider upgrading a kernel if the default is not cutting it in some area.
I have built a 6.3 kernel some people have used but now  kernel.org hjas advanced to 6.6 kernel
I've been meaning to give a later kernel a go. It should be faster again...
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16 Nov 2023 17:41 #285638 by Roguish
well, I did your suggestion. uninstalled 2.10master, installed 2.9 thru synaptic, and then changed from the 6.5 kernel to the 6.1.0.13 kernel.
everything seems to be working. haven't done any real machining yet, but lcnc starts up fine...looks good.
thanks for the advice.
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20 Nov 2023 20:19 #286097 by Roguish
OH boy.  new problem, I think, with 2.10...
Ok, I uninstalled the 2.9 that I had,  downloaded the latest 2.10 debs from buildbot2, and installed them.
Since I'm using qtdragon, a little customized, I copied files around for it.  easy, I have a script file.....

Started up linxcnc and everything sort of looks ok, except there is a constant stream of messages in the command window (I usually start up in a command window)
see the picture attached.
does this wether I use my old 4.19rt kernel, or the newer 6.1rt kernel....
to get past this I have gone back to 2.9.1 and all is ok.

but seems like a problem in 2.10....   So, whaz up????
Andy or Seb ????

 
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