11233

Problem

The 13.2.0 operating system did not run from an SD card in the external slot of an XO-1.

Solution

Upgrade to 13.2.1 as follows:

• select an SD card of at least 4GB; the faster the better, but it will be erased by the process below,
• select a USB drive of at least 1GB,
• download 32014o0.zip (601 MB) and expand the contents onto the USB drive,
• Shutdown the XO-1,
• insert the USB drive and the SD card into the XO-1,
• hold down all four game keys above the power button,
• turn on the laptop,
• wait for the message Release the game keys to continue,
• release the game keys, progress will be displayed, grey blocks will turn green, and the screen will show:

 Blocks/square: 2        Total blocks: 14195     Now writing: 70  0 %
 Installing to SD card ..... please wait.

• after a few minutes it will show:

 Blocks/square: 2        Total blocks: 14195     Now writing: 0  0 %
 Rebooting in 10 seconds ... please wait.

• it is finished, you may the USB drive then, during the reboot, or after the reboot.

Workaround

Engineers may derive a workaround by understanding the ticket, see <trac>11233</trac> and the associated changes in git.

Installing with an XO-1.5, XO-1.75, or XO-4

Use these steps to prepare an SD card for an XO-1, using an XO-1.5, XO-1.75, or XO-4.

• download as above,
• insert the USB drive and SD card into an XO-1.5, XO-1.75, or XO-4, but do not boot the laptop from the USB drive,
• instead, at the Ok prompt, type

devalias fsdisk ext:0
fs-update u:\32014o0.zd

• wait for the fs-update to complete,
• remove the USB drive, insert into an XO-1, power on, wait for Sugar, verify version in My Settings, About my Computer.

How install works for XO-1 with SD card

• the fs0.zip file is expanded, the signature verified, and the payload is run,
• the payload is Forth source for fs-update to external SD card on XO-1, followed by block hashes,
• the fs-update reads the block hashes, reads the 32014o0.zd file, expands the blocks, and writes them to the SD card, then reboots.

How boot works for XO-1 with SD card

• the firmware normally checks for bootable components on USB drives, SD card, and then internal storage, so when an SD card contains a valid operating system it is booted,
• the operating system identifies the root filesystem on the SD card (dracut-modules-olpc package).

See Also

• <trac>11233</trac>,
• Announcement - http://lists.laptop.org/pipermail/devel/2014-June/038492.html
• Adding swap space on the SD card,
• 13.2.1
• Release notes/13.2.1