Hi all,
We're using a PXE / network install system for the SunFire x4100M2. We
had a kernel that worked fine for the x4100 and x2100/x2100M2, but this
new platform does something funny: after selecting the kernel at the
PXElinux prompt, I don't see any kernel messages on the serial console,
until the kernel has finished initialising. They are appearing on the
VGA console, when I use console=tty0 console=ttyS0. With console=ttyS0
only, they appear nowhere.
There is a BIOS setting called "Redirect" that has one option that looks
like a smoking gun: "Redirection After BIOS POST". This has three settings:
Disable: Turns off the redirection after POST
Boot Loader: Redirection is active during POST and during Boot Loader.
Always: Redirection is always active
(Some OSs may not work if set to Always)
It seems that "always" is behaving just like "Boot Loader" says it
should - as soon as it would be saying "Loading kernel..." then I see no
messages at all. Except perhaps a suprious character like "Á".
The "Boot Loader" option then works like "disable" - as soon as PXElinux
(or GRUB) loads, the console switches off and I see the "Á".
What's got me confounded is that it suddenly wiki comes right after root
gets mounted - be that an initrd image, or anything else. What is it
that changes then, and how can I make that happen earlier?
I found the console.txt file, and it seems that while boot is in
progress the "system driver" is active vs the "modular driver".
However, I'm not sure why there is a change of driver at that point; I
didn't ask for it.
I'm coming to the conclusion that the serial console redirection in the
BIOS is broken somehow, anyone have any ideas on tracking this down further?
--
Sam Vilain, Chief Yak Shaver, Catalyst IT (NZ) Ltd.
phone: +64 4 499 2267 PGP ID: 0x66B25843
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
