From: Daniel Kiper <dki...@net-space.pl> Subject: Re: FTDI serial console support? Date: Tue, 15 May 2018 22:00:06 +0200
> On Fri, May 11, 2018 at 03:55:36PM +0200, Petter Gustad wrote: >> >> Is there a way to specify a FTDI based serial console using >> GRUB_TERMINAL, GRUB_SERIAL_COMMAND, or some other variable? If yes, >> what is the syntax? >> >> BTW my serial port adapter matches the vendor id and device id given >> in grub-core/bus/usb/serial/ftdi.c: >> >> Bus 001 Device 008: ID 0403:6001 Future Technology Devices International, >> Ltd FT232 Serial (UART) IC > > Have you tried usbserial_ftdi, e.g. GRUB_TERMINAL=usbserial_ftdi? > Just guessing... Yes, I tried (as I found the "usbserial_ftdi" string in the source) the but grub-mkconfig does not accecpt it: grub-mkconfig -o /boot/grub/grub.cfg Invalid output terminal "usbserial_ftdi" Currently I have this: GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyUSB0,115200n8" #GRUB_TERMINAL="console serial" GRUB_TERMINAL="serial" GRUB_SERIAL_COMMAND="usbserial_ftdi --speed=115200 --unit=0 --word=8 --parity=no --stop=1" But this does not seem to work either, even though I do get console output on my USB serial after the kernel has loaded (due to GRUB_CMDLINE_LINUX being passed to the kernel), e.g. I can do "echo hello > /dev/console" and read "hello" on the USB serial output. When I do a "reboot" I observe messages about unmounting filesystems etc. I was hoping to be able to select kernels and options in grub using the USB serial line. Best regards //Petter _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
