(Answering my own question) Clues are found here: http://http.download.nvidia.com/XFree86/Linux-x86/169.12/README/index.ht ml <http://http.download.nvidia.com/XFree86/Linux-x86/169.12/README/index.h tml> Nvidia say that ACPI and hotkeys hasn't been implemented for all cards yet but might be in the future for more recent ones. A couple of XConfig options to play around with were: Option "ConnectToAcpid" "boolean" Option "EnableACPIHotkeys" "boolean" No luck for the Quadro FX 570M as far as I could tell I still think that it should be possible to implement ACPI compatibility through an some sort of abstraction layer by linking ACPI events to nvidia-settings so that there would be no need to wait for nvidia. Alternatively one could play with the open source Nouveau drivers http://nouveau.freedesktop.org/wiki/
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Newman Sent: Tuesday, 18 March 2008 11:52 PM To: ubuntu-devel-discuss@lists.ubuntu.com Subject: Interfacing nvidia graphics cards and acpi brightness Hi I started out tonight with the aim of adding a bug because my compaq 8510w brightness function keys have never worked under Ubuntu Gutsy and now not under Hardy Heron alpha 6 either. However what I have found is that there is no bug to report :) The gnome-power-manager works okay but doesn't change screen brightness. I.e. hitting the function key does change the current value here: $ cat /proc/acpi/video/C14B/C15F/brightness levels: 100 51 30 37 44 51 58 65 72 79 86 93 100 current: 65 Also adjusting the nvidia-settings brightness values actually changes the screen brightness (and the nvidia card registers) but nothing for the acpi video brightness value. I've also found that I can adjust the screen brightness by using the nvidia commandline interface: $ nvidia-settings --assign RedBrightness=x --assign GreenBrightness=x --assign BlueBrightness=x where x is a value between -1 and 1. So where now - there is no bug? I've looked at smartdimmer and nvclock. These packages don't work for all nvidia cards and seem to be risky to use. Especially when there is a nvidia-settings package available which can already do this. So I think that acpi should be linked to nvidia-settings somehow (I suppose this should be the responsibility of nvidia). Would a acpi-nvidia package work (where acpi and nvidia-settings are prerequistes and also an active nvidia kernel/xserver) that matches acpi video and xserver screens and sychronises registry settings? Cheers Pete
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