Radeon HAWAII running in llvmpipe mode

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today I did a clean install of Kubuntu 15.04 using the cd image of today and I realized that my Radeon R9 290 (Hawaii) is working in llmvpipe mode (software render).

I do not know if it's a general problem or just me happens to me.

but I want to report it, and whether there is a solution to enable hardware acceleration.

there is a piece the log of Xorg.0.log, the entire file is attached

[    19.967] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
[    19.967] (--) RADEON(0): Chipset: "HAWAII" (ChipID = 0x67b1)
[    19.967] (II) RADEON(0): GPU accel disabled or not working, using shadowfb for KMS

there is glxinfo log:

ame of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4

OpenGL vendor string: VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.6, 256 bits)
OpenGL version string: 3.0 Mesa 10.5.0-rc3
OpenGL shading language version string: 1.30
OpenGL context flags: (none)

Today Kubuntu 15.04 updated Mesa3d to the final version (10.5.0) but still my "radeon r9 290" boot as llvmpipe