On 03/09/15 00:23, Mikulas Patocka wrote: > [ I sent this some times ago, but didn't get any response ] > > > Nvidia cards have a BIOS function 0x4f14 that allows to set flat panel > scaling. This patch adds a module parameter "scaling" that uses this > function to set the scaling. By default, the parameter is -1, so that the > driver doesn't attempt to call the scaling function. > > This patch is useful when using the binary Nvidia graphics driver - in > that case, the console may be only in text mode or VESA mode. By default, > the video card does scaling that degrades font quality and changes aspect > ratio. This patch makes it possible to turn off the scaling and improve > font quality on the console. > > The allowed values depend on VESA BIOS. On my card, the following values > are allowed: > -1 - do not change the scaling > 0 - scale to full screen > 1, 2 - don't scale > 3 - scale and preserve aspect ratio > 4 - scale with black border around > > Example use: > echo 1 >/sys/module/uvesafb/parameters/scaling; fbset 1280x1024-60 -depth 32 -a > - this sets unscaled 1280x1024 video mode that has much sharper font than > the scaled modes. I have to say I don't know much about x86 video, but isn't uvesafb supposed to be a generic driver? Adding nvidia specific features there doesn't sound like a right way to handle this. Tomi
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