Re: Question: kernelopts on raspberry pi

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On Wed, 9 Sep 2020, Steven A. Falco wrote:

But that doesn't seem to have any effect.  After booting, I still see:

# cat /proc/cmdline
BOOT_IMAGE=(hd1,msdos2)/vmlinuz-5.8.0-1.fc33.aarch64 root=UUID=36a097ba-7577-4cc9-977e-df76c6590c48 ro

Where does the kernel get its command line on RPi?

I have an rPi3 and Pinebook.  Same place as Intel.

  grubby --info=DEFAULT

shows default boot

  grubby --info=ALL

to show all kernels

https://fedoramagazine.org/setting-kernel-command-line-arguments-with-fedora-30/

Here is Pinebook:

  # grubby --info=DEFAULT
  index=0
  kernel="/boot/vmlinuz-5.8.6-201.fc32.aarch64"
  args="ro"
  root="/dev/mapper/pinevg-f32"
  initrd="/boot/initramfs-5.8.6-201.fc32.aarch64.img"
  title="Fedora (5.8.6-201.fc32.aarch64) 32 (Thirty Two)"
  id="8814846c48db47e2bb50c252d4bc0a29-5.8.6-201.fc32.aarch64"

Note that root and args are defaulted to kernelopts in grubenv.

  # grub2-editenv list
  saved_entry=8814846c48db47e2bb50c252d4bc0a29-5.8.6-201.fc32.aarch64
  kernelopts=root=/dev/mapper/pinevg-f32 ro
  boot_success=1
  boot_indeterminate=0
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