<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Interfacing nvidia graphics cards and acpi brightness</TITLE> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2900.3157" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=460060300-20032008>(Answering my own question)</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2></FONT> </DIV> <DIV dir=ltr align=left><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2>Clues are found here:</FONT></SPAN></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><A href="http://http.download.nvidia.com/XFree86/Linux-x86/169.12/README/index.html">http://http.download.nvidia.com/XFree86/Linux-x86/169.12/README/<SPAN class=460060300-20032008>index.html</A></SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008></SPAN></FONT></FONT></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008>Nvidia say that ACPI and hotkeys hasn't been implemented for all cards yet but might be in the future for more recent ones.</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008></SPAN></FONT></FONT></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008>A couple of XConfig options to play around with were: </SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008></SPAN></FONT></FONT></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008> </SPAN>Option "ConnectToAcpid" "boolean"</FONT></FONT></FONT></DIV> <DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=460060300-20032008> </SPAN>Option "EnableACPIHotkeys" "boolean"</FONT></FONT></FONT></DIV> <DIV> </DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2>No luck for the Quadro FX 570M as far as I could tell</FONT></SPAN></DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2>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.</FONT></SPAN></DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2>Alternatively one could play with the open source Nouveau drivers <A href="http://nouveau.freedesktop.org/wiki/">http://nouveau.freedesktop.org/wiki/</A></FONT></SPAN></DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=460060300-20032008><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><BR></DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> ubuntu-devel-discuss-bounces@lists.ubuntu.com [mailto:ubuntu-devel-discuss-bounces@lists.ubuntu.com] <B>On Behalf Of </B>Peter Newman<BR><B>Sent:</B> Tuesday, 18 March 2008 11:52 PM<BR><B>To:</B> ubuntu-devel-discuss@lists.ubuntu.com<BR><B>Subject:</B> Interfacing nvidia graphics cards and acpi brightness<BR></FONT><BR></DIV> <DIV></DIV> <P><TT><FONT size=2>Hi<BR><BR>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.<BR><BR>However what I have found is that there is no bug to report :)<BR><BR>The gnome-power-manager works okay but doesn't change screen brightness. I.e. hitting the function key does change the current value here:<BR><BR> $ cat /proc/acpi/video/C14B/C15F/brightness<BR><BR> levels: 100 51 30 37 44 51 58 65 72 79 86 93 100<BR> current: 65<BR><BR>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.<BR><BR>I've also found that I can adjust the screen brightness by using the nvidia commandline interface:<BR><BR> $ nvidia-settings --assign RedBrightness=x --assign GreenBrightness=x --assign BlueBrightness=x<BR><BR>where x is a value between -1 and 1.<BR><BR>So where now - there is no bug?<BR><BR>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.<BR><BR>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?<BR><BR>Cheers<BR>Pete<BR></FONT></TT></P></BODY></HTML>