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Linux Framebuffer

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Revision as of 01:11, 7 April 2009 by Dank (talk | contribs)

It would seem that the Intel framebuffer drivers do not (and will not?) support the i965. But...

[recombinator](0) $ fbset -i

mode "1024x768-60"
    # D: 62.360 MHz, H: 47.530 kHz, V: 60.013 Hz
    geometry 1024 768 1024 768 16
    timings 16036 128 32 16 4 128 4
    accel true
    rgba 5/11,6/5,5/0,0/0
endmode

Frame buffer device information:
    Name        : Intel(R) 965G
    Address     : 0xd0000000
    Size        : 8122368
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 8
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 2048
    MMIO Address: 0xe0300000
    MMIO Size   : 524288
    Accelerator : Intel 830M/845G/85x/865G
[recombinator](0) $  uname -a
Linux recombinator 2.6.28-rc6 #1 SMP Sat Nov 22 01:55:26 EST 2008 x86_64 GNU/Linux
[recombinator](0) $ 

and, from dmesg:

Linux agpgart interface v0.103
agpgart-intel 0000:00:00.0: Intel 965G Chipset
agpgart-intel 0000:00:00.0: detected 7676K stolen memory
agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000
intelfb: Framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM/945GME/965G/965GM chipsets
intelfb: Version 0.9.6
intelfb 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
intelfb: 00:02.0: Intel(R) 965G, aperture size 256MB, stolen memory 7932kB
intelfb: Non-CRT device is enabled ( DVO port B ).  Disabling mode switching.
intelfb: Initial video mode is 1024x768-16@60.
intelfb: Changing the video mode is not supported.
Console: switching to colour frame buffer device 128x48

GEM

GEM, the Graphics Execution Manager present in recent X.org (requiring 2.6.29 for kernel support), takes over the framebuffer:

[recombinator](0) $ fbset -i

mode "1600x1200-0"
    # D: 0.000 MHz, H: 0.000 kHz, V: 0.000 Hz
    geometry 1600 1200 1600 1200 32
    timings -1 0 0 0 0 0 0
    rgba 8/16,8/8,8/0,0/0
endmode

Frame buffer device information:
    Name        : inteldrmfb
    Address     : 0xd07df000
    Size        : 7680000
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 6400
    MMIO Address: 0xe0300000
    MMIO Size   : 1048576
    Accelerator : Intel 830M/845G/85x/865G
[recombinator](0) $ uname -a
Linux recombinator 2.6.29.1 #1 SMP Fri Apr 3 22:43:27 EDT 2009 x86_64 GNU/Linux
[recombinator](0) $ 

See also