Config Linux BIOS: Is it possible (Re: [OLPC-devel] DOS in Windows Flash Disaster Recovery Utility?

[supat at supat.eu.org]

On Mon, 4 Sep 2006, James Cameron wrote:

> On Mon, Sep 04, 2006 at 02:22:00PM -0800, supat at supat.eu.org wrote:
>> After I burn OLPC to Linux BIOS, seem it is always has error messages at
>> the beginning like:
>>
>> ACPI ... DSCP not found ??
>
> I don't get this message, and besides since ACPI is not planned to be
> present I wouldn't be concerned if I did see such a message.  Does the
> system boot anyway?  When during the boot process do you see this
> message?  What are you booting?
>

I am careless. The exact words is what you said "ACPI: Unable to locate 
RSDP"

Can this cause problem to slackware to be unable to find the firmware?


> Booting build 81 shows in dmesg "ACPI: Unable to locate RSDP", and
> "ACPI: Interpreter disabled."  This is expected.
>
>> I press F1 and it has only images.
>
> This seems normal.  F1 enters the image menu, then you use left and
> right arrow keys to select an image.  The last image, on my board, gives
> a LinuxBIOS shell prompt.


Even not press the arrows finally it will boot USB after cannot find the 
NAND memory devices.

a LinuxBIOS shell prompt?

I will not call it. Because boot from utotu CD or slak CD can have the 
same initrd shell.

IMO: Linux shell prompt should be capable to config some things like 
change date, change CPU speed, change boot priority, etc.

>> I am not sure that is feature or bug.
>
> It seems to be a feature.

OK. Thank you to let me know my BIOS linux is normal.

>
>> Could you please verify me that :
>> There is no way under linux BIOS to config the OLPC devices?
>
> Perhaps the source code would show what it is capable of, or perhaps we
> need to wait for documentation on what configuration options are
> available.  Is there any reason you need to configure devices?  Why
> shouldn't Linux be able to do this configuration?  We control the BIOS,
> there seems no justification for device configuration functionality.

Earlier BIOS control Marvell Wireless by reset or power-off.
Now. Fedora can control Marvell Wireless completely in good shape w/o need 
reset/power-off but unfortunately I cannot find out how slackware can do 
the same :(

>> If so, after I power-off, is thare any way to bring back the old BIOS.
>
> Perhaps.  I've not tested it, and I'm not willing to.  You should be
> able to boot from the same filesystem you did the olpcflash commands on.
> But why would you need to do this at all?  Why do you need ACPI?

I don't know. Because I only see that error and that error correlated or 
co-incident with slackware become unable to make usb8xxx to work 
correctly. :(

supat

> -- 
> James Cameron    mailto:quozl at us.netrek.org     http://quozl.netrek.org/
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