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I have installed Ubuntu for Raspberry Pi 20.04 LTS 64-bit on a Raspberry Pi 4.

Now I want to add the threadirqs kernel parameter.

But neither the usual Ubuntu GRUB way nor the usual Raspberry Pi OS way of setting kernel parameters work.

As a comparison, on a bullseye-based Raspberry Pi OS, threadirqs can be enabled by adding threadirqs to /boot/cmdline.txt, e.g.

$ cat /boot/cmdline.txt
console=serial0,115200 console=tty1 root=PARTUUID=70118e11-02 rootfstype=ext4 fsck.repair=yes rootwait threadirqs

threadirqs features will be available after reboot.

Abdull
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    For the Ubuntu Raspberry pi image the cmdline.txt file is in /boot/firmware. – zarzare May 07 '21 at 15:29
  • Ubuntu 20.10 has reached the end of life. It is not supported here anymore. – user68186 Oct 21 '22 at 18:53
  • @user68186, I have fixed my question, as it also pertains to a 20.04 LTS version (end of life 2030). By the way, I find it doesn't make sense to close questions which are still valid for current and possibly future versions. – Abdull Oct 22 '22 at 19:22

1 Answers1

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It is located at /boot/firmware/cmdline.txt.

Abdull
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