The BIOS has a "Console Redirection" section with the following info:
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Console Redirection Enabled: yes
Serial Port Baudrate: 115200
Serial Port Flow Control: none
Terminal Emulation: VT100
Serial 1 Multiplexer: System
Note (1): The Operating System can provide Text Console access independend from BIOS settings.
Note (2): Text Console access via Serial over LAN (SOL) is working only if COM1 is used for Text Console (from BIOS and/or O/S).
Note (3): Text Console can also be used from a Telnet or SSH connection within the Remote Manager shell.
ipmitool info seems to match:
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ipmitool -I lanplus -U ipmi -P ... -H ... sol info
Get HPM.x Capabilities request failed, compcode = d4
Info: SOL parameter 'Payload Channel (7)' not supported - defaulting to 0x0e
Set in progress : set-complete
Enabled : true
Force Encryption : false
Force Authentication : false
Privilege Level : ADMINISTRATOR
Character Accumulate Level (ms) : 100
Character Send Threshold : 80
Retry Count : 7
Retry Interval (ms) : 2500
Volatile Bit Rate (kbps) : IPMI-Over-Serial-Setting
Non-Volatile Bit Rate (kbps) : 115.2
Payload Channel : 14 (0x0e)
Payload Port : 623
this configuration *does* produce some output early on as the server boots its UEFI firmware, but nothing at all apart from these GUIDs:
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FUJITSU: Driver Guid DXE: 9ABE3E20-6DD5-42AB-A297-933CFF323E18
FUJITSU: Driver Guid DXE: 9ABE3E20-6DD5-42AB-A297-933CFF323E18
FUJITSU: Driver Guid DXE: 80E66E0A-CCD1-43FA-A7B1-2D5EE0F13910
FUJITSU: Driver Guid DXE: 80E66E0A-CCD1-43FA-A7B1-2D5EE0F13910
FUJITSU: Driver Guid DXE: 2DF10014-CF21-4280-8C3F-E539B8EE5150
...
I don't understand what the "Serial 1 Multiplexer" means, and when the server boots up I don't see any uart or other serial port in dmesg, that I could assign the server OS console as output either. How can I get the server "console" to be available over the ipmitool interface?