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.

nomodeset does not help to retain serial output, it just means that you want to use X drivers, instead of kernel modesetting.

Best regards,

Chuong.

On Fri, Mar 18, 2016 at 1:46 AM, Gordan Bobic <gordan@redsleeve.org> wrote:

When the kernel boots and the fb driver initializes and the
initramfs starts, the output disappers from the serial console.
This seems to correspond to the display output switching to a
different mode. It is present during u-boot, Tianocore and grub,
however. Is there a way to tell the kernel to not change the mode
so that full control via the serial line can be retained? I tried
"nomodeset" which I think should do this by disabling modesetting,
but it has been ineffective. Is there a way to achieve this?
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Chuong Tran

Applied Micro - SW Engineer II

Phone: 84-932176910