>>>> 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 [ 0.004075] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0' 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
You need to specify speed for the serial port, you can now with F-28+ also use ttyS0, the ttyO0 is an alias for compatibility. > 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 I suspect it was powering on but the serial console negotiation was causing random data on the console during u-boot which interrupted the boot process. I've never had to press the power button on any of my beaglebones to make it start. _______________________________________________ arm mailing list -- arm@lists.fedoraproject.org To unsubscribe send an email to arm-le...@lists.fedoraproject.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@lists.fedoraproject.org/message/WWR22XRJNJCJL7R63UELD2KUQITRFNRG/
