On Thu, 8 Oct 2015, Tomi Valkeinen wrote: > > 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 Where do you think that this functionality should be added? To Nouveau? - Nouveau can't be used with nVidia binary driver, and this functionality is useful especially with nVidia binary driver (it allows to get nice console with sharp fonts). BTW. I don't know if this BIOS function is supported on AMD or not. Could someone try it? I don't have an AMD card. Mikulas -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
