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Regression #16031

closed

Some older ISA-based uart consoles do not function on development snapshots around 25.03 or later

Added by Jim Pingle 2 months ago. Updated about 2 months ago.

Status:
Resolved
Priority:
Low
Assignee:
Luiz Souza
Category:
FreeBSD
Target version:
2.8.0
Start date:
Due date:
% Done:

100%

Estimated time:
Plus Target Version:
25.03
Release Notes:
Force Exclusion
Affected Version:
Affected Architecture:

Description

At some point after 24.11, serial consoles for some devices started failing on development snapshots (Plus 25.03-25.07+, CE 2.8.0). The kernel boot messages are still printed to the serial console but there are no signs of the uart device or console in those messages, the pfSense boot messages do not show, nor does the menu. No input is processed after boot, either.

It appears there were some upstream changes in non-PNP ISA devices that may be related.

By adjusting the values in device.hints (or via loader.conf / loader.conf.local) to specifically probe the uart devices via ISA instead of ACPI, these devices function again:

hint.uart.0.at="isa" 
hint.uart.1.at="isa"

Known affected platforms so far are RCC-VE (4860, etc.) and APU devices.

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