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Thread: how to change display settings for knoppix 6.2.1

  1. #1
    Junior Member
    Join Date
    Jul 2010
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    22

    how to change display settings for knoppix 6.2.1

    what i am really interested in is changing it from 16 bits to 32 bits... i think...

    is that possible?

  2. #2
    Senior Member registered user
    Join Date
    Feb 2010
    Posts
    512
    Did you try the cheatcode depth=24 ? You can look into /var/log/Xorg.0.log and search for bpp or depth. I can see the following sections in that log file if I use that cheatcode.
    (II) Loading sub module "vgahw"
    (II) LoadModule: "vgahw"
    (II) Loading /usr/lib/xorg/modules/libvgahw.so
    (II) Module vgahw: vendor="X.Org Foundation"
    compiled for 1.7.4, module version = 0.1.0
    ABI class: X.Org Video Driver, version 6.0
    (**) SAVAGE(0): Depth 24, (--) framebuffer bpp 32
    (==) SAVAGE(0): RGB weight 888
    (==) SAVAGE(0): Default visual is TrueColor
    (II) SAVAGE(0): vgaHWGetIOBase: hwp->IOBase is 0x03d0, hwp->PIOOffset is 0x0000
    (==) SAVAGE(0): Using XAA acceleration architecture
    (==) SAVAGE(0): Using HW cursor
    (==) SAVAGE(0): Using video BIOS to set modes
    (II) Loading sub module "ramdac"
    (II) LoadModule: "ramdac"
    (II) Module "ramdac" already built-in
    (--) Depth 24 pixmap format is 32 bpp
    (II) Loading sub module "int10"
    (II) LoadModule: "int10"
    (II) Reloading /usr/lib/xorg/modules/libint10.so
    (II) SAVAGE(0): initializing int10
    (II) SAVAGE(0): Primary V_BIOS segment is: 0xc000
    (II) SAVAGE(0): VESA BIOS detected
    (II) SAVAGE(0): VESA VBE Version 2.0
    (II) SAVAGE(0): VESA VBE Total Mem: 31680 kB
    (II) SAVAGE(0): VESA VBE OEM: S3 Incorporated. Twister BIOS
    (II) SAVAGE(0): VESA VBE OEM Software Rev: 1.0
    (II) SAVAGE(0): VESA VBE OEM Vendor: S3 Incorporated.
    (II) SAVAGE(0): VESA VBE OEM Product: VBE 2.0
    (II) SAVAGE(0): VESA VBE OEM Product Rev: Rev 1.1
    (II) SAVAGE(0): 17556 kB of Videoram needed for 3D; 32768 kB of Videoram available
    (II) SAVAGE(0): Sufficient Videoram available for 3D
    (II) SAVAGE(0): [drm] bpp: 32 depth: 24
    The background picture looks better if I apply that color depth.

  3. #3
    Senior Member registered user
    Join Date
    Feb 2010
    Posts
    198
    If fbdev driver is in use 16 bpp is all you get. Check it in /var/log/Xorg.0.log as klaus2008 suggested. If you see there LoadModule "fbdev" then you can restart Knoppix and use knoppix xmodule=vesa it will give you 32 bpp color depth. Even better is to load the driver for you graphics card, so you will have hardware acceleration

  4. #4
    Junior Member
    Join Date
    Jul 2010
    Posts
    22
    I am actually now running Knoppix from VM with a windows host...

    Virtualbox says I can't use full screen unless the display setting is set to 32 bit on the guest OS?

    I can't find fbdev on xorg.0.log.... so i guess i can't change it...

    oh well... knoppix still runs all the machines i need to to run on... (except for the VM) so i am still a happy camper

  5. #5
    Junior Member
    Join Date
    Jul 2010
    Posts
    22
    found it!

    but i can't save the changes... how do i make changes to xorg.0.log?

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