Sympthoms:
i) after a kernel upgrade, usb devices don’t work on system boot: “error”, “usb”, “descriptors file” shows up when detaching the usb device.
Solution:
i) Boot into fallback mode (initramfs). usb devices should work.
ii) Edit /etc/default/grub and append your kernel options to the GRUB_CMDLINE_LINUX_DEFAULT line:
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GRUB_CMDLINE_LINUX_DEFAULT="/boot/vmlinuz-linux root=UUID=XXXXXXXX rw cryptdevice=/XXXXXX quiet"
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replace the XXXX of this line with the information found in the fallback initramfs section of /boot/grub/grub.cfg
iii) regenerate grub config :
# grub-mkconfig -o /boot/grub/grub.cfg
iv) regenerate mkinitcpio
# mkinitcpio -p linux
v) reboot your system.
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