Release notes/11.2.0

NOTE: The contents of this page are not set in stone, and are subject to change! This page is a draft in active flux ... Please leave suggestions on the talk page.

EXTREMELY EARLY DRAFT!

Purpose

This is a new, major OLPC OS release, including a general software refresh to bring OLPC in-line with more recent open source platform technologies (Fedora 14, Sugar 0.92, GNOME 2.32). Various new features have been added, many previous problems have been fixed, and this release paves the way for increasingly effective development cycles from an expanded OLPC development team.

• Installation instructions

New features

Sugar 0.92

The 10.1 release series included Sugar 0.84. This release includes Sugar 0.92 including a variety of improvements and fixes. For more information, see the following release note pages, denoting all of the individual releases that have been made since 0.84:

• Sugar-0.86 release notes
• Sugar-0.88 release notes
• Sugar-0.90 release notes
• Sugar-0.92 release notes

In addition to the user-visible changes described there, many fixes and improvements have been made to Sugar internals.

In terms of activities, the Abacus, FotoToon, Clock and Hello World activities have been added to the base software release, and Ruler has been re-added. Most of the other activities included have been updated, including enhancements and bug fixes.

GNOME 2.32

This release includes GNOME version 2.32, compared to the previous 10.1 release series which included GNOME 2.26. Many improvements and fixes are included. For more information, refer to the following release notes pages, covering the releases that have been made since 2.26:

• GNOME 2.28 release notes
• GNOME 2.30 release notes
• GNOME 2.32 release notes
• Note that OLPC continues to ship a slimmed down version of GNOME, so not all features discussed may be relevant

Previous OLPC OS releases included batterymon as the battery monitor applet within GNOME. Due to lack of maintainership and deprecation of batterymon, this release replaces batterymon with batti. There are some visual differences but the functionality is the same.

Base system updates

Various behind-the-scenes improvements in underlying open source technologies are included through newer versions of the base system. This release is built on top of Fedora 14 and Linux 2.6.35.13.

Even though we now exert greater control over the selection of software packages included in the release, the move from Fedora 11 to Fedora 14 has resulted in a small increase in the on-disk size of the base system. We will work to improve on this for future releases.

New XO-1.5 video driver

A new "chrome" video driver for the XO-1.5 provides performance improvements, a hardware-accelerated mouse cursor, multiple Xv surfaces (should be useful for some applications e.g. Skype), and means that graphics in rotated screen modes are just as fast as non-rotated modes.

New filesystems

XO-1

The underlying filesystem for XO-1 has switched from JFFS2 to UBIFS. This solves various long-term problems such as huge system slowdown when the flash was nearly full.

The flash is now partitioned, with a small JFFS2 boot partition used by the firmware and the rest of the flash occupied by a UBIFS partition.

XO-1.5

The XO-1.5 software images have switched from ext3 to ext4, an incremental improvement offering various minor performance enhancements.

Faster installation for XO-1.5

Previously, installation of software images on the XO-1.5 laptop wrote to every sector of the disk, even ones where no data was actually stored. As of this release, installation images are now sparse, meaning that data is only written to disk during the flashing process at the point which data actually resides. The result is that installation time is now more than twice as quick.

The effect of this optimization is visible during the flashing process. Previously, all disk blocks were displayed on-screen, and the squares went green one by one from left-to-right and top-to-bottom. Now, only select blocks will go green, and it is normal for these blocks to be spaced out over different parts of the disk with big gaps present. This may appear strange to those familiar with the flashing of previous software releases, but it is now perfectly normal.

Faster boot

The early-boot code (initramfs) has been tweaked and slimmed to boot faster, and bootup time of the XO-1 is greatly decreased thanks to the switch to the UBIFS filesystem and the partitioned disk layout.

olpc-update improvements

olpc-update, OLPC's specialised software update system, previously had usability issues in that after performing an upgrade, it did not delete the previous operating system version or offer a user interface so that it could be cleaned up. The result was that a lot of disk space was wasted. This is solved as of this release: old software versions are automatically deleted soon after the new version has been installed and booted.

In the 10.1 release series, olpc-update faced an inefficiency of always updating many binaries and libraries that were technically unchanged; this resulted in increased disk space requirements for the update process. This has been fixed for 11.2 by no longer prelinking binaries and libraries, which was shown to only have a very minor performance impact.

Build system improvements

• default timezone can be specified in build system

XO-1.5: improved solar charging

The XO-1.5 was recently found to be less effective at charging from solar panels than the XO-1. This has now been fixed through the implementation of Maximum Power Point Tracking in the charging code. XO-1.5 solar panel charging is now on-par with XO-1.

Installation

XO-1.5

How to install signed build os870 of release 11.2.0 on XO-1.5.

The build is installed to the internal microSD device. You will need a USB drive of at least 1 GB capacity, but only for the duration of the installation.

ALL USER DATA WILL BE ERASED FROM THE LAPTOP!

• Prepare the USB drive:
  • Download os870.zd,
  • Save the file to the top directory of the USB drive,
  • Download os870.zsp.fs.zip,
  • Save the file to the top directory of the same USB drive,
  • Rename the file to fs.zip, (removing the os870.zsp part of the name),
  • Check the USB drive contains at least the two files fs.zip and os870.zd.

• Prepare the laptop:
  • Make a copy of any data you wish to keep,
  • Check the battery is inserted and locked,
  • Check that the power cord is in place and the battery indicator is green,
  • Turn off the laptop, unless it is already off,
  • Insert the USB drive into any USB port on the laptop,

• Start installing:
  • Hold down all four game keys (see this in pictures),
  • Turn on the laptop,
  • Wait for the message Release the game keys to continue,
  • Release the game keys.

Installation progress will be displayed. Green colour will fill grey blocks. It will take about ten minutes. Once finished, the laptop will reboot automatically. Remove the USB drive during or after the reboot. The USB drive can be used on other laptops.

If you see a message Boot failed then either:

• the USB drive has not been properly prepared, or;
• the firmware is out of date and should be updated (see Firmware).

XO-1

How to install signed build os870 of release 11.2.0 on XO-1.

The build is installed to the internal NAND flash device. You will need a USB drive of at least 1 GB capacity, but only for the duration of the installation.

ALL USER DATA WILL BE ERASED FROM THE LAPTOP!

• Prepare the USB drive:
  • Download os870.img,
  • Save the file to the top directory of the USB drive,
  • Download os870.img.fs.zip,
  • Save the file to the top directory of the same USB drive,
  • Rename the file to fs.zip, (removing the os870.img part of the name),
  • Check the USB drive contains at least the two files fs.zip and os870.img.

• Prepare the laptop:
  • Make a copy of any data you wish to keep,
  • Check the battery is inserted and locked,
  • Check that the power cord is in place and the battery indicator is green,
  • Turn off the laptop, unless it is already off,
  • Insert the USB drive into any USB port on the laptop,

• Start installing:
  • Hold down all four game keys (see this in pictures),
  • Turn on the laptop,
  • Wait for the message Release the game keys to continue,
  • Release the game keys.

Installation progress will be displayed. Green colour will fill yellow blocks. It will take about five minutes. Once finished, the laptop will reboot automatically. Remove the USB drive during or after the reboot. The USB drive can be used on other laptops.

If you see a message Boot failed then either:

• the USB drive has not been properly prepared, or;
• the firmware is out of date and should be updated (see Firmware).

Update

You may wish to update from a previous version of the operating system. This method preserves most user data, the Sugar Journal and installed Sugar Activities, but does not preserve certain operating system customizations such as additional packages.

(Update is distinct from install. If you have followed the install procedures above, then you need not follow this section.)

Preparation

To prepare for an operating system update:

• remove as much saved content as you no longer need,
• remove any large activities you no longer need, and;
• use Software update to ensure the Terminal activity is the latest available version.

Follow the instructions in one of the subsections below, according to which method and laptop model you are using.

Simple Online Update

• establish an internet connection from the laptop (if you plan to do online update),
• start the laptop normally,
• start the Terminal Activity, and depending on the laptop model type:

XO-1.5

sudo olpc-update 11.2.0_xo1.5-870

XO-1

sudo olpc-update 11.2.0_xo1-870

See Simple Online Update for more detail about the method.

After the Update

• Sugar will attempt to update its Activities -- you should be online for the Activity Updater to complete.

Known problems

XO-1

Disk image is large

The move to the UBIFS filesystem plus the general growth of the Fedora base software has the unfortunate result that the XO-1 images are significantly larger than before, not leaving much disk space to the user.

This issue can be worked around by first installing an older release (e.g. 10.1.3), and then using olpc-update to upgrade to this release. This has the effect of not using the new filesystem, you will instead stay with the old one (jffs2) which stores things in a more compact way. However, even then, the size of this release is large, and olpc-update needs to store both old and new software releases on-disk for a short amount of time, so you may have to erase some of your files/activities to allow the upgrade process to complete. Once completed, you should have enough space to reload your data.

We will greatly improve this situation in the following development cycle.

Deployments also have further options of customising and rebuilding this software release to reduce disk space usage which is quite critical for XO-1:

• Excluding GNOME from the image, and shipping Sugar-only
• Shipping only one or two languages, instead of the large collection shipped by OLPC in the official release
• Building jffs2 images (as in previous releases) instead of ubifs images

Automatic power management instability

On XO-1, automatic power management is disabled by default. It can be enabled through the Sugar Settings dialog, but this will trigger some issues such as:

• Wireless network connectivity may fail, <trac>10232</trac>, or take some time to resume, <trac>9854</trac>, <trac>10272</trac>,
• Touchpad may seem slow to respond as the system wakes, <trac>10233</trac>,
• In GNOME a new file browser window may appear as the system wakes if a USB or SD card is inserted, <trac>10306</trac>.