[alsa-devel] [PATCH] ALSA: hda: invert mute led polarity for HP laptops

Gustavo Maciel Dias Vieira gustavo at sagui.org
Mon Dec 12 14:55:59 CET 2011

Em Seg, 2011-12-12 às 12:27 +0100, Takashi Iwai escreveu:
> At Sun, 04 Dec 2011 15:13:29 -0200,
> Gustavo Maciel Dias Vieira wrote:
> > 
> > At least two HP laptop models with the IDT 92HD81B1X5 codec have the
> > polarity of the mute led inverted with respect to the current driver
> > default. Change the polarity for these machines only.
> > 
> > Signed-off-by: Gustavo Maciel Dias Vieira <gustavo at sagui.org>
> Don't these have really no proper DMI entries?  The recent HP laptops
> should have the mute LED GPIO pin and polarity set in SMBIOS. 

Unfortunately no. Actually, it appears someone at HP is pulling a prank
on us. In a Pavilion dm4 the BIOS string is "HP_Mute_LED_P_G", where P
and G are not numbers, but the actual letters.


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