Re: [Xpert] X4, ATI Mach64, and bad video modes
On Wed, Nov 22, 2000 at 12:11:34PM -0700, Marc Aurele La France wrote:
> On Fri, 3 Nov 2000, Zack Weinberg wrote:
>
> > I've just upgraded to XFree86 4.0.1 (thanks for the packages,
> > Branden!) and have encountered a bug in video mode detection with the
> > Mach64 drivers.
...
> > (--) ATI(0): Virtual size is 1152x864 (pitch 1152)
> > (**) ATI(0): Default mode "1024x768": 94.5 MHz, 68.7 kHz, 85.0 Hz
> > (**) ATI(0): Default mode "1152x864": 108.0 MHz, 67.5 kHz, 75.0 Hz
> > (--) ATI(0): Display dimensions: (32, 24) cm
> > (--) ATI(0): DPI set to (91, 91)
>
> > But in that mode the right hand two-thirds of the screen is mangled.
> > It appears as if the image has been duplicated, shifted right about a
> > hundred pixels, distorted, and overlaid on the original. With massive
> > flicker. xvidtune cannot help.
>
> > If I reduce the depth to 16, then both 3.3.6 and 4.0.1 accept 1152x864
> > and display it correctly.
>
> What about -depth 24 -fbbpp 24? If that works fine, then fbbpp 32 (the
> default) at 108MHz is simply asking too much out of your video memory.
Yes, -fbbpp 24 displays correctly. Is it feasible to make the driver
detect this automatically?
zw
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