Messages in this thread |  | | Date | Thu, 04 Oct 2001 23:59:56 +0100 | From | Alex Bligh - linux-kernel <> | Subject | Re: specific optimizations for unaccelerated framebuffers |
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--On Thursday, 04 October, 2001 4:28 PM +0200 Etienne Lorrain <etienne_lorrain@yahoo.fr> wrote:
>> Since anything less than 75Hz gives me headaches, how do you propose to >> make this work? > > Because there is still memory on the video board, the display stay > at whatever refresh the video board is set up, 80 Hz if you want.
A long time ago (tm) I used this approach successfully. It involved using an (onboard) display controller with a limited dotclock doing large resolution high bpp displays (but at 10 to 20 Hz), capturing the digital output in offboard Video RAM, and displaying it at 90Hz. You get some slight artefacts but in general worked well. And here I was copying the whole screen each time. If you only copy changed areas, you'd ge much better results.
-- Alex Bligh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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