On 2023-09-09, Grant Edwards <grant.b.edwa...@gmail.com> wrote: > I've set up a serial console by adding the following to my kernel > command line: > > console=ttyS0,115200 console=tty1 > > It works fine for the first few seconds as the kernel starts up. All > of the expected messages are sent out ttyS0. > > But, soon after init starts, the serial console stops working.
That's because one of the first things openrc runs in /etc/init.d/dmesg, and it changes the kernel logging level to the value defined in /etc/conf.d/dmesg (which defaults to 1). Changing the level in /etc/conf.d/dmesg from 1 to 8 allowed the serial console to continue working as I wanted it to. [I spent an entire day trying to get serial logging to work on Ubuntu with systemd, and got exactly nowhere. After replacing Ubuntu/systemd with Gentoo/openrc it didn't take long to track down the answer in the openrc docs.]
