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Date: Sat, 2 Feb 2008 09:30:08 -0200 From: Henrique de Moraes Holschuh <hmh@....eng.br> To: Len Brown <lenb@...nel.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Matthew Garrett <mjg59@...f.ucam.org>, linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org Subject: Re: [PATCH] Rationalise ACPI backlight implementation On Fri, 01 Feb 2008, Len Brown wrote: > You might check if CONFIG_ACPI_VIDEO=m is set and you can load the "video" module. > While the sony may be non-standard and not load, your thinkpad may work. It will work except under new X.org, which disables BIOS backlight functionality in order to do it directly, at least on Intel GPUs (and probably also on ATI GPUs. nVidia is no-man's-land). And I have been told that X.org can do 256 backlight levels on Intel hardware *including* switching the backlight off, instead of just the 16 levels Lenovo chose to export through ACPI. Looks like someone should add a kernel framebuffer device for those Intels :) We really need to solve the userspace mess, though. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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