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    SubjectRe: [Linux-fbdev-devel] [PATCH] fbdev: find mode with highest refresh rate in fb_find_mode()
    On Wed, Jul 18, 2007 at 11:18:15PM +0800, Antonino A. Daplas wrote:

    > > > Currently if the refresh rate is not specified fb_find_mode() returns
    > > > the first known video mode with the requested resoluion, which provides
    > > > no guarantees wrt the refresh rate. Change this so that the mode with
    > > > the highest refresh rate is returned instead.
    > >
    > > What refresh rate it sets when used on card or monitor without DDC?
    >
    > Yes, I noted this also while reviewing patches. fb_find_mode() is used
    > predominantly with the 'generic' modedb which contains modes that are
    > not specific to the card or monitor. And fb_try_mode() is not a
    > guarantee that the returned refresh rate will be safe (we have a lot of
    > drivers that do not check the timings against the display capabilities).
    >
    > It would be best that fb_find_mode() return the safest refresh rate
    > (60Hz) instead of the highest.

    How about modifying it so that it looks for a mode with the highest
    refresh rate if either a non-generic modedb is used or
    info.monspecs.{vfmin,vfmax,hfmin,hfmax,dclkmax} are all non-zero,
    and for a mode with refresh rate closest to 60 Hz otherwise?

    I'm sorry for the delayed reply.

    Best regards.
    --
    Michal Januszewski JID: spock@im.gentoo.org
    Gentoo Linux Developer http://people.gentoo.org/spock

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