3

My Linux system is built by Buildroot and runs on a Raspberry Pi. I use a Usb to TTL Serial cable to get a console.

Here comes cmdline.txt

dwc_otg.fiq_fix_enable=1 sdhci-bcm2708.sync_after_dma=0 dwc_otg.lpm_enable=0
console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1
root=/dev/mmcblk0p2 rootwait

Here comes the getty related part of /etc/inittab

# Put a getty on the serial port
ttyAMA0::respawn:/sbin/getty -L  ttyAMA0 115200 vt100 # GENERIC_SERIAL

Only kernel messages are printed; no daemons ones (such as sshd).

How can this issue be fixed?

3

console is specified twice in that cmdline:

console=ttyAMA0,115200
console=tty1

Perhaps the second one has overridden the first (it can't be both at the same time). If ttyAMA0 is what you want to use, remove console=tty1.

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