How to enable VDPAU acceleration for accelerated Flash video ?

[hector]

Hi I installed the last Catalyst Drivers on Linux Mint 17 Cinnamon and ubuntu 14.04:

fglrxinfo

display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon R7 200 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

vainfo

libva info: VA-API version 0.35.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/fglrx_drv_video.so
libva info: Found init function __vaDriverInit_0_32
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.35 (libva 1.3.0)
vainfo: Driver version: Splitted-Desktop Systems XvBA backend for VA-API - 0.7.8
vainfo: Supported profile and entrypoints
VAProfileH264High : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD

....but i try enable Flash Hardware Video Decode Acceleration in Firefox:

sudo apt-get install xvba-va-driver
sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install libvdpau-va-gl1
sudo sh -c "echo 'export VDPAU_DRIVER=va_gl' >> /etc/profile"
sudo mkdir /etc/adobe
sudo echo -e "EnableLinuxHWVideoDecode = 1\nOverrideGPUValidation = 1" | sudo tee /etc/adobe/mms.cfg

... Firefox crash in youtube videos for example, only working if i disable the line:

/etc/adobe/mms.cfg

#EnableLinuxHWVideoDecode = 1
OverrideGPUValidation = 1

..but if i disable the line I check if acceleration is working by right clicking a Flash video on YouTube and selecting "Stats for nerds". The stats box displays the following: "accelerated video rendering, software video decoding" and i think should displays: "accelerated video rendering, hardware video decoding"

I do not know if is possible the hardware acceleration in recent catalyst drivers ..

Best Regards.