11.2.0 XO-1 boot from USB or SD doesn't work for me

[chm]

I've had no luck trying to boot 11.2.0 on
an XO-1 either.

The ability to boot from an SD card has
allowed me to use my XO-1 and to have it
available for testing various OS versions.

Any pointers to references for an SD card
boot for the latest OS versions would be
appreciated.

Also, if there is a better list for this
query, please advise.

Thanks much,
Chris

On 8/24/2011 8:03 AM, Frantisek Dufka wrote:
> Hello,
>
> previous OS versions booted fine without any change when same build
> files were in internal jffs2 or on SD card or on USB stick. With 11.2.0
> it look like this no longer works.
>
> When I boot from USB or SD slot the initrd prints many lines of
> something similar to 'chdir to /lib/modules failed' and finally
> something like 'Root device not found, sleeping forever'.
>
> When examining initrd files in /boot I found that there are actually two
> initial ramdisks, one initrd below 2MB size and one actrd having ~5MB.
> The 5MB one does have /lib/modules inside while the normal initrd does not.
>
> When replacing initrd by actrd the chdir /lib/modules error message is
> gone, and I see usb modules inserted and I see mass storage module
> detecting the usb device but it printed another messages about
> "scsi_wait_scan module not found" and again root device not found.
>
> I am using SD card with single ext3 partition with fs label "OLPCRoot"
> in usb card reader or directly in SD slot (just like it works with
> previous OS versions).
>
> Then I extracted initrd with gzip and cpio, copied /lib/modules from
> actdr, repacked and can confirm the original initrd code behaves exactly
> the same as actrd one.
>
> Then I found file cmdline/20olpc-boot-cmdline.sh inside intrd that
> checks boot device from ofw and hardcodes root=/dev/sda2 with this code:
> if [ -z "$root" ]; then
> # if no root device was specified, use OFW bootpath to find root
> ...
> /pci/usb@*) root="/dev/sda2" ;; # external USB, assume partitioned
>
>
> So I changed sda2 to sda1 but it still does not boot with same message -
> root device not found. Sorry that I don't have exact error messages but
> the device does not boot so I cannot copy them directly.
>
> Currently I am out of ideas.
>
> Is booting from SD or USB on xo-1 supposed to work with 11.2.0? (looks
> like it is not)
>
> Anyone knows the boot procedure inside initrd and can point me to place
> that needs fixing so usb or sd card boot works with 1.2.0?
>
>
> BTW, I have a need for both ways, my son's xo-1 boots older OS from SD
> card (with swap file) and I have another xo-1 with broken CAFE chip that
> boots (older OS) from USB only and mostly works except internal NAND, SD
> slot and camera - 3 features done by semi-dead CAFE chip. The only
> user-visible issue is camera not working in activities and I can live
> with that :-) Semi-working means that ocassionally the CAFE chip works
> (based on phase of the moon) but mostly the kernel prints some error
> messages at boot when probing PCI devices. When it works it actually
> boots from internal NAND just fine but the system hangs few minutes or
> hours later when CAFE chip decides to go away again.
>
> Frantisek
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