Qubes crashes starting sys-usb

Seems like I don’t know how to add to the kernel command line. I tried it as described in How to add custom kernel options in v4.1? - #4 by bungali

But after rebooting nothing changes in /proc/cmdline. Not sure what I’m doing wrong.

output of what I did for reference :

[FBO@dom0 ~]$ sudo vim /etc/default/grub
[FBO@dom0 ~]$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found theme: /boot/grub2/themes/qubes/theme.txt
Found linux image: /boot/vmlinuz-5.15.94-1.qubes.fc32.x86_64
Found initrd image: /boot/initramfs-5.15.94-1.qubes.fc32.x86_64.img
Found linux image: /boot/vmlinuz-5.15.94-1.qubes.fc32.x86_64
Found initrd image: /boot/initramfs-5.15.94-1.qubes.fc32.x86_64.img
done
[FBO@dom0 ~]$ sudo dracut -f
cat: /sys/power/resume: No such file or directory

and content of /etc/default/grub :

GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=false
GRUB_TERMINAL_OUTPUT="gfxterm"
GRUB_CMDLINE_LINUX="rd.luks.uuid=luks-7a7c7a0b-c150-4a46-9c44-94d89c1b19db rd.lvm.lv=qubes_dom0/root rd.lvm.lv=qubes_dom0/swap plymouth.ignore-serial-consoles rd.driver.pre=btrfs rhgb quiet rd.qubes.hide_all_usb"
GRUB_DISABLE_RECOVERY="true"
GRUB_THEME="/boot/grub2/themes/qubes/theme.txt"
GRUB_CMDLINE_XEN_DEFAULT="console=none dom0_mem=min:1024M dom0_mem=max:4096M ucode=scan smt=off gnttab_max_frames=2048 gnttab_max_maptrack_frames=4096"
GRUB_DISABLE_OS_PROBER="true"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX usbcore.authorized_default=0"