<div dir="ltr"><div class="gmail_extra">Hi,</div><div class="gmail_extra"><br></div><div class="gmail_extra">You can add "earlycon=uart8250,mmio32,0x1c020000" to see how far the kernel boot on serial console can go.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Also, make sure to say Y to CONFIG_SERIAL_8250 & relevant config in your kernel .config.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Best regards,</div><div class="gmail_extra"><br></div><div class="gmail_extra">Chuong.</div><div class="gmail_extra"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 18, 2016 at 2:49 PM, Michael Howard <span dir="ltr"><<a href="mailto:mike@dewberryfields.co.uk" target="_blank">mike@dewberryfields.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On 18/03/2016 03:18, Chuong Tran wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Gordan,<br>
<br>
If you want to retain the output on serial console, please add kernel command "console=ttyS0,115200" at the grub config.<br>
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.<br>
<br>
<br>
</blockquote></span>
I use this setting ("console=ttyS0,115200 console=tty0") but output is not retained on the serial console. Maybe this is kernel specific.<span><font color="#888888"><br>
<br>
-- <br>
Mike Howard</font></span><div><div><br>
<br>
_______________________________________________<br>
Arm-dev mailing list<br>
<a href="mailto:Arm-dev@centos.org" target="_blank">Arm-dev@centos.org</a><br>
<a href="https://lists.centos.org/mailman/listinfo/arm-dev" rel="noreferrer" target="_blank">https://lists.centos.org/mailman/listinfo/arm-dev</a><br>
</div></div></blockquote></div><br>
</div></div>