On Fri, Jun 8, 2018 at 10:06 AM, Peter Robinson <pbrobinson@xxxxxxxxx> 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 [ 0.004075] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0' 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 > > 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. Thanks for the info. > >> 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. Oh well, I never think about this. Especially from the first day I have my BBB, I need to push the power button to make it start. But luckily I do not need to push it now. Just FYI, I tested 4.17.0-1.fc29.armv7hl on BBB (as well as my other arm devices, but it is a different topic) and decided to close the ancient bug we filed before since I don't think we can install any popular desktop now. https://bugzilla.redhat.com/show_bug.cgi?id=1223618 -- Ziqian SUN (Zamir) zsun@xxxxxxxxxxxxxxxxx GPG : 1D86 6D4A 49CE 4BBD 72CF FCF5 D856 6E11 F2A0 525E Want to know more about Fedora? Visit https://fedoraproject.org/wiki/ _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxxxxxxxxxx/message/EZVNPIDBZJO3RWRONNXCL35FEAHTL7FD/
