On Sun, Dec 15, 2019 at 12:28 PM Nick Holland <n...@holland-consulting.net> wrote: > > Well...yeah. > If the boot loader echoed anything, it's behaving As Desired -- a char at > the command line means "STOP ALL BOOTING, I have something special I want > you to do". > > [...] > However, I think there are a few things you might be able to do to solve > your problem... > > 1) BIOS upgrade. Long shot, but maybe? > 2) BIOS config option? Also a long shot, but since I'd call this a > boot firmware bug, maybe some combination of USB related options would > fix this?
Always a good idea. If you have console redirection configured in the BIOS, make sure redirection after boot is *disabled*, and configure the serial console in the bootloader instead. I've seen garbage characters produced by the BIOS console on some systems, but the OS and bootloader usually work better. > 3) a boot.conf file should fix -- simply putting "boot" in /etc/boot.conf > should override anything in the keyboard buffer. Need to "control" the > boot? plug in a keyboard and hold down either CTRL key, and you will be > given the boot> prompt. Note that this is not yet implemented in the UEFI bootloader: https://github.com/openbsd/src/blob/43e343f8aa17502e68dbb74fa3dd463280c74fe5/sys/arch/amd64/stand/efi64/efiboot.c#L514-L519 (Compare pc_getshifts() in .../libsa/bioscons.c, which calls BIOS interrupts. Anyone know the UEFI equivalent?) -Andrew
