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Testing radeon KMS on Ubuntu

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  • #61
    Originally posted by tormod View Post
    Boot with radeon.modeset=1 to use KMS and with radeon.modeset=0 to run without. Official Ubuntu kernels currently default to 0, the xorg-edgers kernels default to 1.

    If you have an AGP card, you can force the AGP mode with radeon.agpmode=X where X is 1,2,4,8 (same as the old AGPMode option in xorg.conf, see "man radeon"). You can turn off AGP (and force PCI instead) with radeon.agpmode=-1.

    "modinfo radeon" lists all options for the radeon module. For general boot options, see https://help.ubuntu.com/community/BootOptions

    Ignore the "unknown option" warning, it is a false warning.
    try writing agpmode=-1 - at least for me radeon.modeset=1 did not work for the official kernel, but modeset=1 did.

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    • #62
      Originally posted by tormod View Post
      Boot with radeon.modeset=1 to use KMS and with radeon.modeset=0 to run without. Official Ubuntu kernels currently default to 0, the xorg-edgers kernels default to 1.
      And official Linus' tree kernels default to 1 as well, aight?

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