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#1 2009-06-11 21:47:53

connexion2000
Member
Registered: 2006-10-15
Posts: 116

Kernel 2.6.30 and ATI open source driver, 2d acceleration

Hi,
I have just compiled 2.6.30 kernel and there should be some change with 2d acceleration performance because of dri modules in new kernel. But I have just turned on desktop effects in KDE with XRender engine, but the speed is not as I expected. It is still quite choppy. I own radeon 4850.
Here is my xorg.conf:

# **********************************************************************
# Module section -- this  section  is used to specify                   
# which dynamically loadable modules to load.                           
# **********************************************************************

Section "Module"
        Load "glx"
        Load "dri"
        Load "drm"
EndSection        


# **********************************************************************
# Files section.  This allows default font and rgb paths to be set      
# **********************************************************************

Section "Files"
        FontPath "/usr/share/fonts/misc"
        FontPath "/usr/share/fonts/TTF" 
        FontPath "/usr/share/fonts/Type1"
EndSection                               


# **********************************************************************
# Server flags section.                                                 
# **********************************************************************

Section "ServerFlags"

EndSection


# **********************************************************************
# Monitor section                                                       
# **********************************************************************

Section "Monitor"
        Identifier "Gateway HD2201"
EndSection                         


# **********************************************************************
# Graphics device section                                               
# **********************************************************************

Section "Device"
        Identifier "Radeon HD4850"
        Driver "radeon"           

        Option "DRI" "true"
        Option "AccelMethod" "EXA"
EndSection                        


# **********************************************************************
# Screen sections                                                       
# **********************************************************************

Section "Screen"
        Identifier "Default"
        Device "Radeon HD4850"
        Monitor "Gateway HD2201"
        DefaultDepth 24         

        Subsection "Display"
                Depth 8     
                Modes "1680x1050"
                ViewPort 0 0     
        EndSubsection            

        Subsection "Display"
                Depth 16    
                Modes "1680x1050"
                ViewPort 0 0     
        EndSubsection

        Subsection "Display"
                Depth 24
                Modes "1680x1050"
                ViewPort 0 0
        EndSubsection
EndSection


# **********************************************************************
# ServerLayout sections.
# **********************************************************************

Section "ServerLayout"
        Identifier  "Simple Layout"
        Screen "Default"
EndSection

Should I change something?

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#2 2009-06-12 20:53:25

app4des
Member
Registered: 2009-02-18
Posts: 39

Re: Kernel 2.6.30 and ATI open source driver, 2d acceleration

Yes with kernel 2.6.30, Latest ati cards have 2d acceleration (exa, xrender), but this mainly helps for playing videos and using simple exa compositing managers (xcompmgr, metacity compositing manager, or xfce compositing manager).

KDE Compositing is designed and works best with OpenGL, the Xrender option is there as a fallback mode, whatever your card/drivers, xrender will always be choppy there.

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#3 2009-06-13 15:15:17

jarryson
Member
Registered: 2007-02-18
Posts: 298

Re: Kernel 2.6.30 and ATI open source driver, 2d acceleration

maybe you have to wait the new version of mesa and xf86-video-ati and libdrm etc.

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#4 2009-06-14 02:04:32

leeyee
Member
From: Kingston, Canada
Registered: 2009-01-07
Posts: 150

Re: Kernel 2.6.30 and ATI open source driver, 2d acceleration

Since there are so many ATI improvement news these days, I've got confused with its real status. How does the new 2.6.30 kernel support newer R6xx/R7xx chips now? And doesn't it needs correspond drivers to fulfill its goals?


Archlinux x86_64 on Thinkpad T400
Intel X4500MHD / ATI HD3470 Graphics, 2G RAM, 160G HD

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#5 2009-06-14 16:57:50

flamelab
Member
From: Athens, Hellas (Greece)
Registered: 2007-12-26
Posts: 2,160

Re: Kernel 2.6.30 and ATI open source driver, 2d acceleration

R600-R700 chips will receive 3D ( OpenGL) support with Mesa 7.6 and Linux kernel 2.6.31, but they won't have KMS/DRI2 support.

Wait until then and use catalyst.

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