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    SubjectRe: Patch to control VGA bus routing and active VGA device.
    Date
    On Tuesday, January 18, 2005 11:38 am, H. Peter Anvin wrote:
    > > On Monday, January 17, 2005 7:43 pm, Jon Smirl wrote:
    > > > Attached is a patch to control VGA bus routing and the active VGA
    > > > device. It works by adding sysfs attributes to bridge and VGA devices.
    > > > The bridge attribute is read only and indicates if the bridge is
    > > > routing VGA. The attribute on the device has four values:
    > >
    > > How is it supposed to work? Is VGA routing determined by the chipset?
    > > Is it separate from other legacy I/O and memory addresses?
    >
    > Yes, there are special control bits in any PCI bridge header for the
    > VGA ports.

    Well, not all of them, which is why I asked. Though obviously this patch will
    need some very platform specific bits at any rate.

    Jesse
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