On Mon 14 Feb 2022 at 10:54:21 (+0100), basti wrote: > Hello, > > I try to use a USB Serial-Converter to output the grub menu on a > Serial port. > > By the way the output is working at kernel boot time. (I See it on the > remote host) > > How can I add usbserial_pl2303.mod to the GRUB core image? > > The file is located in /boot/grub/i386-pc/ on the root partition but I > can't see it in /boot/grub/i386-pc/ in the grub shell.
In the grub shell, try: Grub> insmod usbserial_pl2303 (If you can't remember its entire name, you may find that Grub> insmod usbs<TAB>p<TAB> works, with the TAB invoking the completion facility.) To make it permanent, you can edit /etc/default/grub. This file has # info -f grub -n 'Simple configuration' near the top, and that command can find you the option for adding: GRUB_PRELOAD_MODULES=usbserial_pl2303 After adding that line, rerun: # update-grub to incorporate it into your grub.cfg. Cheers, David.
