Hey guys and gals,

I've had my Mario CR-48 for a few months now, and I recently decided to reflash the BIOS and install Ubuntu then Win7. All was fine until I decided that I wanted to revert it back to stock CrOS, so I made a live Ubuntu USB key, installed flashrom and reflashed my old BIOS which I had backed up thankfully and only got those 2 errors, and it said it succeeded. So I reboot and was presented with the "Chrome OS is missing or damaged" screen. Plugged in the recovery key, and it proceeds to recover.. that is until I encounter this error:
DSC0s0254.JPG

I shut it down and checked the dev switch, and at first it wasn't on (the picture might say it is, as I took it after many attempts) so I flipped it and rebooted and still getting the same error.

My question to you CrOS restoring gurus out there is, how do I either revert back to Ubuntu (at least to try and format the SSD then try CrOS recovery again) or any ideas I could try. I've used both a USB drive and a SDHC card and neither will get me past that error and I'm starting to get frustrated that I can't get this to work.

Dang, almost 100 views and no suggestions... maybe I'm overlooking something, but I've tried almost everything. Also, I've noticed that if I try to boot with the developer switch in the "OFF" position, the power light comes on and thats about it. The screen doesn't even come on at all.

I was thinking about trying to see if trying to install Chromium then install Chrome OS would work, but I honestly get confused as far as setting it up and all that stuff. Is there an easier way? I just want to revert to a stock CR-48

I think I fixed it by trying this, minus the BIOS flashing as I'm on stock now:

Originally Posted by gabraham

(I noticed you posted that you figured it out as I was typing this, however I decided to still post this step-by-step guide for others who may have run into this problem.)

I didn't try the official Google build, I used Todd's custom build, but I would imagine the process to be the same, assuming no other issues.

Step-by-step guide for this method:

1. Burn one of Todd Vierling's community build image to a USB flash drive with approximately 4GB minimum capacity. You can use the "Startup Disk Creator" included with Ubuntu, or Universial USB Installer on Windows.
2. Download hexxeh's custom firmware AND NOTE THE FOLLOWING:
   WARNING: THIS FIRMWARE IS ONLY FOR THE GOOGLE CR-48 NETBOOK/LAPTOP. DO NOT ATTEMPT TO USE THIS ON ANY OTHER DEVICE OR YOU WILL BRICK (I.E., UTTERLY RUIN) YOUR COMPUTER.
   
3. On Linux (or any OS with support for reading/writing the flash drive's partitions), mount the drive and look for the C-ROOT partition
4. On the flash drive, browse to:
   
   Code:

   /home/chronos/

   And copy the custom firmware file that you downloaded, "custom.bin", into that folder
5. On the flash drive, edit the script (using gedit or a text editor of your choice) at "/usr/sbin/chromeos-install" to contain ONLY the following:
   
   Code:

   #!/bin/bash
   flashrom -w /home/chronos/custom.bin

   Save the changes and double check to ensure that everything is in order.
   
   Note: You may need administrator privileges in order to edit the script. If so, type the following at a terminal:
   
   Code:

   sudo gedit /usr/sbin/chromeos-install

   "gedit" is a GUI-based text editor that is included with most modern Linux distributions. You can substitute it for a program of your choice if desired.
6. You're done! Safely remove/eject the drive and don't forget to remove the bottom cover of your CR-48 when doing the recovery/flashing process.

from this link. Right now its waiting 300 sec for the developer key change before proceeding. Should have tried this sooner... will update after success or fail.

guess not, although the fact that it got further than the official Chrome recovery did tricked me..

I looked into that recovery.log file it says it wrote onto the disk, and right when it began the recovery, this is what it said:

+ log Beginning system image copy. This will take some time . . .
+ echo Beginning system image copy. This will take some time . . .
+ tee -a /usb/dev/tty1 /usb/dev/tty2
Beginning system image copy. This will take some time . . .
+ log
+ echo
+ tee -a /usb/dev/tty1 /usb/dev/tty2

+ export IS_RECOVERY_INSTALL=1
+ chroot /usb /usr/sbin/chromeos-install --run_as_root --yes --payload_image=/dev/sdb --use_payload_kern_b
This will install from '/dev/sdb' to '/dev/sda'. If you are sure this is
what you want then feel free to enter the root password to proceed.
This will erase all data at this destination: /dev/sda
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000245212 s, 2.1 MB/s
Creating partition tables...
34+0 records in
34+0 records out
17408 bytes (17 kB) copied, 0.00865976 s, 2.0 MB/s
33+0 records in
33+0 records out
16896 bytes (17 kB) copied, 0.0087134 s, 1.9 MB/s
ERROR: cgpt add: GptSanityCheck() returned 3: GPT_ERROR_INVALID_ENTRIES
+ [ 1 -eq 0 ]
+ log Error performing system recovery!
+ echo Error performing system recovery!
+ tee -a /usb/dev/tty1 /usb/dev/tty2
Error performing system recovery!
+ umount /usb/tmp
+ unmove_mounts
+ dlog Moving sys. proc, dev to /usb
+ echo Moving sys. proc, dev to /usb
+ tee -a /usb/dev/tty2 /usb/dev/tty3
Moving sys. proc, dev to /usb
+ mount -n -o move /usb/sys /sys
+ mount -n -o move /usb/proc /proc
+ mount -n -o move /usb/dev /dev
+ TTY_PATH=/dev/tty
+ dlog Done.
+ echo Done.
+ tee -a /dev/tty2 /dev/tty3
Done.

Anyone know what it means and what I can try to make it work?