[yocto] UART test for Yocto

[Bodke, Kishore K]

Hi All,

Can we disable the serial console by deleting "console=tty0 console=ttyS0,115200n8" from the grub.cfg?  Looks like it is not disabled.

I have been reported this issue for the Cedartrail serial port is always enabled regardless of serial console option in the grub.cfg.

Is this due to it is always enabled in cedartrail.conf file below, How do we make sure that serial port can be enabled or disabled by editing the grub.cfg?

SYSLINUX_OPTS = "serial 0 115200"
SERIAL_CONSOLE = "115200 ttyS0"
APPEND += "console=ttyS0,115200 console=tty0"

Thanks
Kishore.
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