Hi,

You can add "earlycon=uart8250,mmio32,0x1c020000" to see how far the kernel boot on serial console can go.

Also, make sure to say Y to CONFIG_SERIAL_8250 & relevant config in your kernel .config.

Best regards,

Chuong.


On Fri, Mar 18, 2016 at 2:49 PM, Michael Howard <mike@dewberryfields.co.uk> wrote:
On 18/03/2016 03:18, Chuong Tran wrote:
Hi Gordan,

If you want to retain the output on serial console, please add kernel command "console=ttyS0,115200" at the grub config.
If you want to see the kernel boot at both serial and vga, add "console=tty0" (for vga) along side with "console=ttyS0,115200". The output from VGA will come after kernel configure the video card.


 I use this setting ("console=ttyS0,115200 console=tty0") but output is not retained on the serial console. Maybe this is kernel specific.

--
Mike Howard


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