https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=288900
Bug ID: 288900
Summary: loader.efi: System won't boot without kvm or
console=comconsole in loader.conf
Product: Base System
Version: 13.5-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
On Hetzner AX102 hosts (Ryzen based), only EFI boot is supported.
With a console connected (kvm) the systems boot just fine. With the console
removed, they (presumably, since it cannot be perceived) get stuck in the boot
loader or end up in a reboot loop (after a while the system shuts down).
This can be worked around by setting:
console="comconsole"
in /boot/loader.conf.
Other settings do not work (e.g., console="comconsole,efi" will get stuck as
well).
The downside of the workaround is that there is no console output during boot,
even if a kvm is connected.
While experimenting with this, I read the loader code and noticed that the
loader.conf(5) man page doe not distinguish between various loaders. It appears
that many settings are not supported in loader.efi (inclusing some of the
settings for console).
System information:
BIOS Information
Vendor: American Megatrends International, LLC.
Version: 20.11
Release Date: 10/24/2024
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 32 MB
Characteristics:
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
Japanese floppy for NEC 9800 1.2 MB is supported (int 13h)
Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
5.25"/360 kB floppy services are supported (int 13h)
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 5.35
Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
Manufacturer: ASRockRack
Product Name: B665D4U-1L
Version: 3.03
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