Re: Two questions about BeagleBone Black

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On 06/06/2018 01:43 AM, Paul Whalen wrote:
> 
> Hi Zamir, 
> 
> ----- Original Message -----
>> Oh by the way, I am using
>> Fedora-Minimal-armhfp-28-1.1-sda.raw.xz
>>
>> On 06/06/2018 12:13 AM, Zamir SUN wrote:
>>> Hi,
>>>
>>> I have two questions about BeagleBone Black.
>>>
>>> 1. Is there anyway to make it boot when plug into power adapter? By this
>>> I mean, without the matter of push the power button.
>>>
>>> 2. I see by console=ttyO0 cannot get the log printed onto serial now.
>>> Although I know console=tty0 can still make the logs printed to a
>>> screen, but showing on the serial is always easier for debug. So is
>>> there anywhere I can check the new console name?
> 
> The console was moved to ttyS0, but should still show output on ttyO0. I 
> still use ttyO0 and get a warning during the boot:
> 
> [    0.004075] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
> 
> I do use an RS232 cape for my serial console[1], so perhaps it differs. Can
> anyone else confirm?
> 

Hi Paul,

Thanks for your info.

Well, I tried "console=ttyO0" and it do not work yesterday. While just
now I switched to "console=ttyO0,115200n8" and it works all of a sudden,
not sure why. So at last my working kernel commandline looks like

ro root=UUID=0dc43cd3-b7f5-47dc-8b74-5261d2dd7ded console=ttyO0,115200n8
console=tty0

By the way, I am using a cheap PL2303 serial, lsusb shows the following.
Bus 002 Device 007: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial
Port

By the way, I don't know what hack takes effect, but today my BBB can
boot without push the button XD

Hope this is still useful for others.


> 
> Paul
> 
> [1] - https://www.logicsupply.com/cbb-ttl-232/
> 
>>>
>>> Thanks!
>>>
>>
>> --
>> Ziqian SUN (Zamir)
>> GPG : 1D86 6D4A 49CE 4BBD 72CF FCF5 D856 6E11 F2A0 525E
>> Want to know more about Fedora?
>> Visit https://fedoraproject.org/wiki/
>> Ready to contribute? See https://whatcanidoforfedora.org/
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>>

-- 
Ziqian SUN (Zamir)
GPG : 1D86 6D4A 49CE 4BBD 72CF FCF5 D856 6E11 F2A0 525E
Want to know more about Fedora?
Visit https://fedoraproject.org/wiki/
Ready to contribute? See https://whatcanidoforfedora.org/
_______________________________________________
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