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Author Topic: 2.6.31.3 -- can't see kernel bootup output  (Read 1250 times)
gorroth2001
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« on: December 01, 2009, 12:46:05 AM »

Hello,

I recently upgraded my Sheevaplug to 2.6.31.3 and set the bootargs to
Code:
rootfstype=jffs2 console=ttyS0,115200 mtdparts=orion_nand:0x400000@0x100000(uImage),0x1fb00000@0x500000(rootfs) rw root=/dev/mtdblock1 ip=192.168.2.10:192.168.2.1:255.255.255.1:DB88FXX81:eth0:none
.

While the system does actually boot and gets to the bash prompt, the kernel itself does not post any messages to stdout on my serial console.  The reason this is an issue for me is because I'm now trying to use an SD card as the root device, and the system is not booting.  I can't tell what's going wrong, because there is no output to the screen.

Can anyone help me get this resolved?  I would really appreciate it.
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gorroth2001
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« Reply #1 on: December 04, 2009, 01:03:11 PM »

Well, I found out why the kernel wasn't showing any startup messages.  While I had passed $(bootargs_console) in bootargs, it doesn't seem like it was being expanded to "console=ttyS0,115200".  I had to just write out that part, and it worked.

I was wondering why the variables weren't expanding, but now I know: I hadn't setup bootargs to do a "setenv bootargs" in it, which would have expanded the variables.  Duh... now that I have console kernel output, I am able to figure it out.
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