Comment 21 for bug 1875665

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DaveTickem (dave-tickem) wrote :

Yes. It would appear that the fix/config change was not rolled into 5.4.0-33-generic. RT_GROUP_SCHED is still enabled in generic build but not lowlatency kernel build.

  twiggy@twiggy:/ $ zgrep CONFIG_RT_GROUP_SCHED /boot/config-5.4.0-33-generic
  CONFIG_RT_GROUP_SCHED=y

  twiggy@twiggy:/ $ zgrep CONFIG_RT_GROUP_SCHED /boot/config-5.4.0-33-lowlatency
  # CONFIG_RT_GROUP_SCHED is not set

I have no idea why... so still using lowlatency build here for now. ymmv!