Ubuntu
linux package

  1. Bug #284319
  2. Comment #19

Comment 19 for bug 284319

Revision history for this message
Dana Goyette (danagoyette) wrote : Re: mute, brightness buttons on new HP 6930p laptop

ANother new thing I noticed: after installing (and fixing) HDAAnalyzer, as shown here, I was able to confirm that asserting GPIO 0 on the adi1984 chip sets the hardware mute feature.
http://article.gmane.org/gmane.linux.alsa.devel/59132

Relevant lines from Windows .inf file:

HKR,GlobalSettings,GPIO_1, 0x00010001, 0x00000008 ; First bit = 8 for inverted and 0 for normal polarity
HKR,GlobalSettings,GPIO_2, 0x00010001, 0x0000000A ; Enable HW Mute control

;GPIO_1 Mute LED commands
HKR,InitVerbs,0019, 0x00010001, 0x00171606 ; Disable 1984A GPIO bit 0
HKR,InitVerbs,0020, 0x00010001, 0x00171702 ; Bit set for an Output