Recently we found the CONFIG_PREEMPT is not enabled in the ubuntu kernel, but it is enabled in the Pi OS's kernel. We plan to enable the CONFIG_PREEMPT in the ubuntu kernel too. So please wait for that kernel and then test a kernel with PREEMPT enabled.
Or you could test Pi OS's kernel first. Looks like there is 5.4 Pi OS's kernel.
Recently we found the CONFIG_PREEMPT is not enabled in the ubuntu kernel, but it is enabled in the Pi OS's kernel. We plan to enable the CONFIG_PREEMPT in the ubuntu kernel too. So please wait for that kernel and then test a kernel with PREEMPT enabled.
Or you could test Pi OS's kernel first. Looks like there is 5.4 Pi OS's kernel.
thx.