Re: Boot stops at loader after build/install cycle

On Wed, Mar 29, 2023 at 06:09:00PM -0700, Steve Rikli wrote:
> On Thu, Mar 30, 2023 at 12:24:13AM +0000, Marcin Cieslak wrote:
> > 
> > The characters look too regular to me, just like a normal terminal
> > codes, not a line noise. I test the device now powered from the
> > same USB hub as the USB-serial converter. Rockchip needs 1500000 bps
> > console, pretty fest.
> 
> OK, then let's assume your serial cables & hoods etc. are OK for the
> moment. What does serial console config on the rpi look like?
> 
> When I specified the rpi4 serial console speed in the config to match my
> serial terminal server, rather than let it "float" (default 9600), my
> loader interruptions stopped, and no more stray characters on the serial
> console after boot either.
> 
> > Also, uboot autoboot prompt never gets interrupted.
> > 
> > I also noticed that "resizewin" complains about not getting
> > information about the terminal upon login on the serial console
> > while being in the vt(4) text mode.
> > 
> > Looks like the bootloader tries to send/receives some terminal control
> > sequences and this fails, interupting the autoboot.
> 
> It may be something along those lines. When I was getting loader stops
> during reboot on my rpi4, my guess was the default FreeBSD speed 9600
> vs. my serial terminal server setting of 115200 was causing stray
> characters on the line during boot, loader interpretted that as a
> keystroke, so it stopped.

Where are you setting the serial console to 9600 baud? AIUI the
Pi defaults to 115200, can it be set in config.txt? 

Thanks for writing!

bob prohaska