Aggiornamento da Ubuntu 8.10
Se si vuole effettuare l'aggiornamento da Ubuntu 8.10, seguire la seguente procedura ((link)).
Nuove caratteristiche
GNOME 2.26
Ubuntu 9.04 include GNOME 2.26, l'ultima versione dell'ambiente grafico che include numerose nuove caratteristiche, come:
Brasero 2.26.0, sviluppato da Philippe Rouquier e Luis Medinas, applicazione per la masterizzazione di CD. Brasero è ora lo strumento predefinito di masterizzazione in Nautilus.
Migliorata la gestione di schermi multipli, con un aggiornamento a gnome-display-properties da parte di Federico Mena Quintero.
X.Org server 1.6
È disponibile l'ultima versione di X.Org 1.6, inoltre sono disponibili gli ultimi driver Mesa 3D DRI, che raggiungono la versione 7.4. Con gli ultimi aggiornamenti molte schede video sono passati a driver liberi.
I driver ATI ora utilizzando in modo predefinito l'accelerazione EXA, risolvendo numerosi bug sulla gestione e la visualizzazione, offrendo una maggior prestazione su diversi chipset. Il supporto all'accelerazione 2D è disponibile per le ultime schede video di tipo «R6xx/R7xx», invece il supporto al 3D alle schede «R5xx». È stato fatto un aggioramento ai driver proprietari fglrx per schede della famiglia «R6xx/R7xx», necessari per il supporto al 3D.
I dirver intel utilizzando ora GEM per la gestione della memoria. La nuova architettura di accelerazione UXA e DRI2 sono ora disponibili come opzioni.
Wacom tablet hotplugging
Wacom tablets now are enabled automatically when attached, no longer requiring xorg.conf modification. Button mapping configuration is not yet supported, but can be set manually by adding an fdi file to /etc/hal/fdi/policy/.
New style for notifications and notification preferences
Included in Jaunty is a simple menu which can be used to set preferences for notification icons, such as where they pop up on the taskbar. Ubuntu 9.04 beta also includes a whole new notification system, as shown in the Flash movie here:
Boot performance
A number of improvements to the Ubuntu start-up process bring significantly improved boot performance to Ubuntu 9.04 RC. Please open bugs if you experience any degradation, and tag them with boot-performance.
Linux kernel 2.6.28
Ubuntu 9.04 RC includes the 2.6.28-11.37 kernel based on 2.6.28.8.
Ext4 filesystem support
Ubuntu 9.04 RC supports the option of installing the new ext4 file system. ext3 will remain the default filesystem for Jaunty, and we will consider ext4 as the default for the next release based on user feedback. There has been extensive discussion about the reliability of applications running on ext4 in the face of sudden system outages. Applications that use the conventional approach of writing data to a temporary file and renaming it to its final location will have their reliability expectations met in Ubuntu 9.04 beta; further discussion is ongoing in the kernel community.
Ext4 support in GRUB was provided by Colin King. If you choose to upgrade your / or /boot filesystem in place from ext2 or ext3 to ext4 (as documented on the ext4 wiki), then you must also use the grub-install command after upgrading to Ubuntu 9.04 RC to reinstall your boot loader. If you do not do this, then the version of GRUB installed in your boot sector will not be able to read the kernel from the ext4 filesystem and your system will fail to boot.
Ext4 support in gparted has been provided by Curtis Gedak.
Cloud computing
Ubuntu 9.04 Server Edition makes it easy to experiment with cloud computing. Eucalyptus, an open source technology which is included in Ubuntu as a technology preview, enables you to use your own servers to deploy, experiment and test your own private cloud that matches the Amazon EC2 API. You can dynamically create virtual machines, configure multiple clusters into a single Cloud and even provide an EBS (elastic block storage) equivalent and an S3 compatible storage manager.
Turn-key mail servers
The dovecot-postfix package in Ubuntu 9.04 RC provides an easy-to-deploy mail server stack, with support for SMTP, POP3, and IMAP with TLS and SASL.
dovecot-postfix was packaged by Ante Karamatić.
Known issues
For a full list of errata for Ubuntu 9.04, please see the Ubuntu 9.04 release notes.
