[alsa-devel] No headphone output on HT Omega Claro Halo

Clemens Ladisch clemens at ladisch.de
Fri Mar 6 11:24:51 CET 2009

Christopher J. Atherton wrote:
> I have an HT Omega Claro Halo (CMI8878) card that is not entirely
> working.  This card has two analog outputs, a pair of RCA connectors and
> also a separate headphone output (3.5mm jack).  The RCA outputs work,
> but the headphone output, which notably passes a signal from a built in
> headphone amp, does not.

Please try this patch:

--- linux/sound/pci/oxygen/oxygen.c
+++ linux/sound/pci/oxygen/oxygen.c
@@ -200,6 +200,8 @@ static void halo_init(struct oxygen *chip)
+	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, 0x100);
+	oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, 0x100);
 static void generic_cleanup(struct oxygen *chip)

More information about the Alsa-devel mailing list