Yes, there is, but it involves a few registers. If you're interested, you can look at the Intel X driver; it should be fairly easy to modify the code to use different refresh rates. See git://anongit.freedesktop.org/git/xorg/driver/xf86-video-intel. Look for "panel_fixed_mode", that'll be what the i830_lvds.c code uses to program the builtin LCD mode.
Jesse On Sunday, November 04, 2007 4:13 Kwon, Owen wrote: > Thank you Jesse, > > So there is the capability to change internal LCD refresh rate in HW > and register to control the rate? > > Thanks, > Owen > > > Owen Kwon (Ohkeun Kwon) > Technical Marketing Engineer > +82 2 767 2428 (Office) > +82 10 9034 4820 (Mobile) > > -----Original Message----- > From: Barnes, Jesse > Sent: Friday, November 02, 2007 1:57 AM > To: [email protected] > Cc: Kwon, Owen > Subject: Re: [Discuss] Question on LCD refresh rate change > > On Wednesday, October 31, 2007 6:58 Kwon, Owen wrote: > > Hello, > > > > > > > > I am finding a way to change the refresh rate of the LCD. My > > graphics chipset is G945. Is there an interface to do this? Or do I > > have to change register value directly. > > Depends, is this a laptop LCD or external? For an external LCD you > can use the 'xrandr' command to change modes. For a builtin LCD, the > driver currently restricts you to using the "best" display mode > (which usually means the highest refresh rate). We're working on > fixing this, but aren't there yet. > > Thanks, > Jesse _______________________________________________ Discuss mailing list [email protected] http://mail.lesswatts.org/mailman/listinfo/discuss
