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=== Debugging Information And Performance ===
=== Debugging Information And Performance ===
Fedora kernels have many [[KernelDebugStrategy | extensive debugging options]] during the development cycle that has a negative impact on performance but provides developers with more information automatically or in the case of bug reports. If you are
Fedora kernels have many [[KernelDebugStrategy | extensive debugging options]] during the development cycle that has a negative impact on performance but provides developers with more information automatically or in the case of bug reports. If you are performance analysis on Rawhide or test releases such as Alpha or Beta, make sure you take this into account.
=== Fedora 12 Release Schedule And Feature Details ===
=== Fedora 12 Release Schedule And Feature Details ===
Revision as of 14:36, 11 August 2009
- 1 Official Announcement
- 2 Filing Bug Reports
- 3 General Information
- 4 Known Issues
- 5 Release Overview
- 6 What's New in Fedora 12 (Constantine) Alpha
- 6.1 Hybrid ISO images - Simple and Easy Live USB's
- 6.2 Thusnelda - Next Generation Open Video Codec
- 6.3 GRUB with Ext4 Support
- 6.4 Dracut - New Booting System
- 6.5 Bluetooth Service On Demand
- 6.6 Faster and Smoother Graphical Startup
- 6.7 Spanning Desktop
- 6.8 GNOME 2.28
- 6.9 KDE 4.3
- 6.10 Firefox 3.5.2
- 6.11 PulseAudio Enhancements
- 6.12 PHP 5.3.0
- 6.13 New Virtualization Features
- 6.14 Changes to System Defaults
- 7 Additional Information
Filing Bug Reports
File bug reports on this Alpha release for directed feedback.
Refer to the Common_F12_bugs page for a listing of issues commonly found with this release, and any known resolutions. This page is maintained throughout the Fedora 12 development cycle.
As always, Fedora continues to develop and integrate the latest free and open source software. The following sections provide a brief overview of major changes from the last release of Fedora. For more details about other features that are making their way into Rawhide and set for inclusion in Fedora 12, refer to their individual wiki pages that detail feature goals and progress. Also, throughout the release cycle, there are interviews with the developers behind key features giving out the inside story. Features for this release are tracked on the feature list page.
The Purpose of the Alpha Release
This release is an installable, testable version of the code and features being developed for Fedora 12 (Constantine). The software is going to have bugs, problems, and incomplete features. It is not likely to eat your data or parts of your computer, but you should be aware that it could.
You have an important part to play in this release. Either install or run a Fedora Live instance of the Fedora 12 Alpha release, then try using a few applications or activities that are important to you. If it doesn't work, file a bug. This release gives the wider community a set of code to test against as a very important step in the process of making a solid Fedora 12 release. You can make the Fedora 12 release better by testing this release and reporting your findings.
What's New in Fedora 12 (Constantine) Alpha
The following sections document major new features and changes in the Fedora 12 Alpha release.
Hybrid ISO images - Simple and Easy Live USB's
In this release, the Fedora Live CD/DVD images can be converted into a Live USB even more simpler than before using just the dd command.
dd if=foo.iso of=/dev/sdX bs=8M
Where foo.iso is the name of the Live CD or DVD image and sdX is the name of the USB device. Windows users can use the utility available from
Fedora continues to offer a more comprehensive Live USB creator that supports additional features including persistent storage and non destructive writing.
Thusnelda - Next Generation Open Video Codec
In support of Free Culture, the open web and to reduce the hold of proprietary and patent encumbered codecs, Red Hat has been sponsoring improvements on the open Ogg Theora video codec implementation codenamed Thusnelda via Christopher Montgomery (xiphmont), who created the format and work has resulted in drastic improvements to the codec. This release features this next generation codec. All applications using libtheora library including all the Gstreamer applications will automatically and transparently be taking advantage of the improvements.
GRUB with Ext4 Support
Fedora 9 originally included experimental support for Ext4 and Fedora 11 included Ext4 by default however GRUB in that version did not support Ext4 and hence required a separate boot partition formatted as Ext3 or Ext2. Fedora 12 now includes a updated version of GRUB with Ext4 support. Anaconda, the Fedora installer will permit this as well.
Dracut - New Booting System
Up until Fedora 10, the boot system (initial ram disk or initrd) used to boot Fedora was monolithic, very distribution specific and didn't provide much flexibility. This will be replaced with Dracut, a initial ram disk with a event based framework designed to be distribution independent. It has been also adopted by the Fedora derived OLPC project's XO operating system. OLPC modules for Dracut is available in the Fedora repository. This replacement is not the default yet in this release but it is intended to be in the general release of Fedora 12. Early feedback and testing is welcome.
Bluetooth Service On Demand
In order to support bluetooth devices, bluetooth background service was started by default in previous versions of Fedora. In this release, bluetooth service is started on demand when needed and automatically stops 30 seconds after last device use instead reducing initial startup time and resources.
Faster and Smoother Graphical Startup
Kernel Mode Setting (KMS) is now enabled by default on Nvidia systems as well through the Nouveau driver. Fedora 10 originally included support for KMS but only for some ATI display cards. In Fedora 11, this was extended to Intel cards as well. This release has extended it further to support Nvidia cards as well.
As as result of this improvement, you will get a faster and smoother graphical boot on (nearly) all systems via the Plymouth graphical boot system developed within Fedora.
In the latest version of Xorg included in this release, if you have a dual monitor setup, your desktop display will span across them instead of using a cloned display by default. This matches the behaviour of other operating systems. More details here
The GNOME 2.28 development snapshot is part of this release, and is the default environment used in the Fedora Desktop Live image. The Desktop Live image is a downloadable CD you can use to test the new GNOME environment with or without installing it. The image can be written to CD, or to a USB flash disk using these instructions.
Icons in menus and buttons are not shown by default in GNOME 2.28. To get the old, icon-rich appearance back, you can go System->Preferences->Appearance, Interface tab and enable, "Show icons in menus". There is however no menu interface to enable the icons for the buttons. You can set the corresponding GConf keys instead for enabling both the menus and buttons to have icons:
gconftool-2 --type boolean --set /desktop/gnome/interface/buttons_have_icons true gconftool-2 --type boolean --set /desktop/gnome/interface/menus_have_icons true
Gnote is installed by default in GNOME for this release replacing Tomboy. Gnote is a port of Tomboy from Mono to C++ and consumes fewer resources. Gnote is both an applet that can sit in your GNOME panel as well as a individual application you can run within other desktop environments. Fedora Desktop Live CD since the Fedora 10 release has excluded Mono and hence Mono based applications like Tomboy due to lack of space. Gnote will be installed by default in the Live CD as well in this release. Tomboy is still available as a optional alternative. If you are upgrading from the previous release you will not be migrated to Gnote and will continue to have Tomboy. Tomboy users can migrate easily to Gnote as it shares the file format and a plugin is available in Gnote that will automatically import Tomboy notes on first run. Many of the Tomboy plugins have been ported to Gnote. Following plugins are available as part of Gnote
- Bugzilla Links
- Tomboy Importer
- Fixed Width
- Insert Timestamp
- Export to HTML
- Printing Support
- Sticky Notes Importer
If required, you can copy the notes from Tomboy to Gnote using the following command in your home directory
cp -r .tomboy .gnote
The sticky notes applet is not provided anymore since Gnote provides a better note taking utility and is available by default in this release.
The GNOME sound preferences now supports profile switching.
Empathy replaces Pidgin as the default instant messenger in GNOME. Empathy is better integrated with GNOME and provides audio and video functionality for XMPP/Jabber users with more improvements planned. Empathy supports importing accounts from Pidgin on first run so users can migrate more easily. Users upgrading from a previous release will continue to have Pidgin by default. Pidgin continues to be available in the repository and is actively maintained.
Epiphany in this release is now using the WebKit engine instead of the Gecko engine from Firefox. If you have issues, do report them via bugzilla.
KDE 4.3 is part of this release and is the default environment in the Fedora KDE Desktop Live image. The KDE Desktop Live image is a downloadable CD you can use to test the new KDE environment with or without installing it. The image can be written to a CD, or to a USB flash disk using these instructions.
Firefox 3.5 pre-release was included in Fedora 11 (Fedora 11 updates includes Firefox 3.5) and this release now includes the general release with many improvements.
Fedora developers have been made several improvements to the PulseAudio system. More details here. These include the following:
- A New Mixer Logic
- UPnP MediaServer Support
- Hotplug Support Improved
- Surround Sound Support for Event Sounds
PHP 5.3.0 is included in this release. Most PHP based web applications should work and others will emit E_DEPRECATED warning that has been disabled for production use. A number of applications have been already fixed upstream including phpmyadmin. Other applications will require changes due to incompatibilities with this new version.
- php-intl - php-enchant
- php-phar (in php-common and php-cli) - php-fileinfo (in php-common) - php-sqlite3 (in php-pdo)
- php-dbase (not maintained) - php-mhash (not maintained) - php-ncurses (moved to pecl, see php-pecl-ncurses)
- php-pecl-phar - php-pecl-Fileinfo
New Virtualization Features
KVM and qemu have gained a number of new features in this release. KVM guest memory usage and performance is improved by the addition of KSM and KVM Huge Page Backed Memory. The performance of the qcow2 image format is greatly improved. Support for both SR-IOV and NIC hotplug has been added. Finally, gPXE is now used in place of etherboot for guest PXE booting.
A new library (libguestfs) and an interactive tool (guestfish) is now available for accessing and modifying virtual machine disk images.
Changes to System Defaults
For security and performance reasons, iptables rules are no longer applied by default to frames forwarded across linux kernel ethernet bridges. See bug #512206 for more details on the rationale behind this change.
Historically, uids and gids 0-100 are reserved for specific system accounts and allocated via the uidgid file in the setup package. This space has now been exhausted and 0-200 is now reserved. This should not be an issue on most systems because dynamically allocated system accounts are usually allocated downwards from 499. See bug 515779 and bug #511957 for more details.
How to Try Alpha
This release is accompanied by installable live CDs of both the GNOME and KDE desktops. With a Live CD users can perform testing and demonstration without installing any software to the hard disk. As this release is largely targeted at developers and contains many bleeding edge packages, this is the best method for less experienced users who want to get involved with testing. The Live CDs also have an option to install Fedora to the hard disk for the more intrepid users.
The best way to download this release is through BitTorrent -- visit the Fedora torrent server for a listing of available images. Release images can also be downloaded from any of our mirrors. Remember that live images can be used on USB media via the livecd-iso-to-disk utility available in the livecd-tools package on existing Fedora systems. Refer to the USB How-to for more instructions. You can also use Jigdo to download the i386, x86_64, or ppc versions.
Fedora does not publish MD5 or SHA1 hashes to verify images since they are not secure enough. Instead we have been using SHA256 since Fedora 11. In Linux, you can use sha256sum command (part of coreutils and installed by default) to verify the Fedora image
sha256sum <ISO image filename>
Fedora GPG signatures can be verified following the instructions here
Debugging Information And Performance
Fedora kernels have many extensive debugging options during the development cycle that has a negative impact on performance but provides developers with more information automatically or in the case of bug reports. If you are running performance analysis on Rawhide or test releases such as Alpha or Beta, make sure you take this into account.
Fedora 12 Release Schedule And Feature Details
Development continues on Rawhide during and after this release, leading up to the beta and then the final release. The links below provide the release schedule for both the pre-releases and the final release, as well as the wiki pages for tracking the various features planned for inclusion in Fedora 12.