[coreboot] sgabios no console output from Seabios (was: coreboot Digest, Vol 113, Issue 17)

Wen Wang wen.wang at adiengineering.com
Tue Jul 15 17:09:06 CEST 2014

Wang Fei,


The I/O port base address was problem. I changed it to 0x2f8, and I am seeing seabios output now. Thanks!  




From: WANG FEI [mailto:wangfei.jimei at gmail.com] 
Sent: Tuesday, July 15, 2014 8:37 AM
To: Paul Menzel
Cc: coreboot; Wen Wang
Subject: Re: [coreboot] sgabios no console output from Seabios (was: coreboot Digest, Vol 113, Issue 17)


Wang Wen,


I found following message in the coreboot-seabios log,


[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.3.4-5.fc17.x86_64 root=UUID=c4d4a429-d880-4caa-831e-9e95b5595f67 ro rd.md <http://rd.md> =0 rd.lvm=0 rd.dm <http://rd.dm> =0 SYSFONT=True KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8 console=ttyS1,115200n8


It shows "console=ttyS1,115200n8", it means the Linux kernel is using ttyS1 as the primary serial console, which is I/O port 0x2f8. But the seabios configure file shows seabios is configured using I/O port 0x3f8. it might be the problem.


Please run "make menuconfig" in seabios and reconfigure the serial port to 0x2f8, let us know any difference.


-Wang Fei


On Mon, Jul 14, 2014 at 9:53 PM, Paul Menzel <paulepanter at users.sourceforge.net <mailto:paulepanter at users.sourceforge.net> > wrote:

Dear Wen,

Am Montag, den 14.07.2014, 11:32 -0400 schrieb Wen Wang:

> Thanks for looking into to it!
> I pulled the seabios tree and built seabios manually (.config shown
> below). I then loaded seabios/out/bios.bin.elf as coreboot payload and
> sgabios as option rom. Unfortunately the same result, no output from
> seabios at all.

If you build and run the utility `cbmem` as shown below, what is the
output of the last two commands?

        $ cd util/cbmem
        $ make
        $ sudo cbmem -l
        $ sudo cbmem -c



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