http://bugzilla.kernel.org/show_bug.cgi?id=14671
Zhang Rui <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |REJECTED Resolution| |INVALID --- Comment #18 from Zhang Rui <[email protected]> 2009-12-10 01:35:41 --- (In reply to comment #17) > Actually, I'm very confused now as to what exactly the problem is... okay, let me state the problem in this way, 1. ACPI can control backlight, but it depends on the BIOS. And unfortunately, we don't find any ACPI backlight support for nvidia graphics card in this BIOS. 2. Native driver can always control the backlight! Intel graphics driver takes over the backlight switching only if ACPI backlight control is not available, via xrandr tool. And nvidia graphics has its own way to control the backligth, e.g. smartdimmer for some laptops and maybe some other tool for some other nvidia laptops, but we ACPI people don't know. This is beyond ACPI's scope. :( that's why I suggest you to open a bug at bugs.freedesktop.org, nvidia graphics guys there may help you. > This link has a user with a different laptop, but same video card using Ubuntu > 32-bit 9.10. He doesn't have devices in /sys/class/backlight or /proc/acpi/ > either. HOWEVER, he is able to change his brightness level with smartdimmer. > I am not able, smartdimmer returns an error about my card being unsupported > and > not being able to shadow the video BIOS. > okay, here is an example, I don't know what this means, but the nvidia graphics guys may know what's happening on this laptop and offer you some help. :) Well, I have to close this bug because BIOS doesn't provide aby ACPI backlight control interface. please re-open it if you still have any questions. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. You are watching the assignee of the bug. ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
