RT preempt update
juerg.haefliger at canonical.com
Tue Sep 1 12:28:20 UTC 2020
On Sat, 15 Aug 2020 22:19:18 -0700
Dongjune Chang <Dongjune.Chang at asu.edu> wrote:
> Hi, I am Dongjune, a student working on some robotics projects using the
> Raspberry Pi4.
> What I just try to do is :
> 1) [Already got success!] Update Ubuntu 18.04.5 LTS (GNU/Linux
> 5.4.0-1015-raspi aarch64)
> I downloaded it from the official Raspberry PI site.
> 2) Apply to patch Preempt Real-time (RT) kernel
> base on this:
Are you sure you need RT? You might want to consider using the
soon-to-be-released PREEMPT kernel (low-latency). It's not RT but for most use
cases it's sufficient.
> but since the RP4 is a little bit different from pure 18.04,
> make -j8 deb-pkg sudo dpkg -i
> Even though I got success in making deb-pkg (first line), but RPI4's RT
> kernel is not perfectly updated (these deb files are generated and
I'm not sure what you're trying to say. Note that an Ubuntu kernel is built
differently and doesn't use the kernel's Makefile. See:
> Could you give me any advice about my troubleshooting?
You have not clearly stated what your problem is and what you need help with.
> Best regards,
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