On Tue, Feb 13, 2018 at 05:57:32PM +0100, Heinrich Rebehn wrote:

> Hello List,
> I am trying to install current snapshot on a Raspberry 3 B. I have problems 
> setting up the serial communication needed to access the installer. I 
> connected the serial pins (6,8,10) to the serial port of my PC and set 
> parameters to 115200/8N1. But I only see garbage on the screen. While 
> googling for a solution I found some hints about the Raspi using bizarre baud 
> rates depending on the system clock.
> Following is my boot/config.txt with the core_freq line added by me:
> arm_control=0x200
> enable_uart=1
> core_freq=250
> device_tree_address=0x100
> kernel=u-boot.bin
> Of course I tried different baud rates, but to no avail. I am using minicom 
> on a intel PC running Mac OS.
> Is this still a known issue? I found no hints about this in the OpenBSD 
> install documents for ARM.
> Can someone please help?
> -Heinrich

115200 8N1 works for me. Do you have the a 3.3V serial adapter? That is vital.

See e.g. https://elinux.org/RPi_Serial_Connection#Console_serial_parameters


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