radeon driver start in llvmpipe mode instead Hardware acceleration

[obedlink]

I have a fresh install of kubuntu 15.04 and the radeon driver (radeon r9 290) starts in llvmpipe mode, currently I have installed oibaf repository with the lastest mesa version and the linux kernel 4.0 RC1 and the problem persist.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xserver-xorg-video-radeon 1:7.4.0-2ubuntu2
Uname: Linux 4.0.0-999-generic x86_64
ApportVersion: 2.16.2-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Mar 5 12:28:06 2015
InstallationDate: Installed on 2015-02-27 (6 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150224.1)
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: No upgrade log present (probably fresh install)

[penalvch (penalvch)]

obedlink, thank you for reporting this and helping make Ubuntu better. If you boot into http://cdimage.ubuntu.com/daily-live/current/ is this reproducible?

If so, could you please run the following command from a terminal as it will automatically gather and attach updated debug information to this report:

apport-collect -p xorg 1428792

Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]