Re: Boot stops at loader after build/install cycle

On Wed, Mar 29, 2023, 9:03 PM Warner Losh <[email protected]> wrote:

> Also, the sequence looks like the terminal is reporting something, maybe
> focus?. That's why it's regular. Though I can't find a sequence that ends
> in R.
>

Do the numbers correspond to the terminal size?

Warner

>
> Warner
>
> On Wed, Mar 29, 2023, 7:09 PM Steve Rikli <[email protected]> wrote:
>
>> On Thu, Mar 30, 2023 at 12:24:13AM +0000, Marcin Cieslak wrote:
>> > On Wed, 29 Mar 2023, bob prohaska wrote:
>> >
>> > > If not maybe try  different hardware (cables, usb-serial adapters,
>> > > power supplies and so on) with an eye to any changes of behavior.
>> > > At this stage making the problem worse might be more useful than
>> > > making it better. Disconnecting the serial-end ground might be
>> > > worth a try. If the connection still works it suggests you have
>> > > multiple grounds, which can cause trouble. I ended up lifting
>> > > the ground on one of my serial connections. AFAIK both Ethernet
>> > > and USB power supplies are floating, so multiple grounds are very
>> > > unlikely. But something might be faulty.
>> >
>> > 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.
>>
>> Cheers,
>> sr.
>>
>>