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    SubjectRe: [PATCH 2/2] Thinkpad Suspend Powersave: Add D2 power saving code for Thinkpads with Radeon video chipsets
    On Thu, Mar 17, 2005 at 10:19:04AM +1100, Benjamin Herrenschmidt wrote:
    > You probably want to remove the bit that does
    > OUTREG(TV_DAC_CNTL, INREG(TV_DAC_CNTL) | 0x07000000);
    > Or you'll lose TV output :)

    I'm not using TV output, and the original patch stated:

    > > + /* Power down TV DAC, that saves a significant amount of power,
    > > + * we'll have something better once we actually have some TVOut
    > > + * support
    > > + */

    I suppose I should renable the TV DAC and see how much power it
    actually consumes if I enable it. It would seem to me that we should
    have a way that we can power down whatever parts of the video chipset
    that we're not using. (For example if I don't have anything connected
    to the VGA output, it would be good if we could power that down too...)

    - Ted
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