[alsa-devel] [PATCH] ALSA: hda - Add enable_msi=0 workaround for four HP machines

[Takashi Iwai]

At Thu, 12 Dec 2013 09:52:03 +0100,
David Henningsson wrote:
> 
> While enabling these machines, we found we would sometimes lose an
> interrupt if we change hardware volume during playback, and that
> disabling msi fixed this issue. (Losing the interrupt caused underruns
> and crackling audio, as the one second timeout is usually bigger than
> the period size.)
> 
> The machines were all machines from HP, running AMD Hudson controller,
> and Realtek ALC282 codec.
> 
> Cc: stable at vger.kernel.org
> BugLink: https://bugs.launchpad.net/bugs/1260225
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>

Applied, thanks.


Takashi

> ---
>  sound/pci/hda/hda_intel.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index af86c71..440c355 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -3446,6 +3446,10 @@ static void check_probe_mask(struct azx *chip, int dev)
>   * white/black-list for enable_msi
>   */
>  static struct snd_pci_quirk msi_black_list[] = {
> +	SND_PCI_QUIRK(0x103c, 0x2191, "HP", 0), /* AMD Hudson */
> +	SND_PCI_QUIRK(0x103c, 0x2192, "HP", 0), /* AMD Hudson */
> +	SND_PCI_QUIRK(0x103c, 0x21f7, "HP", 0), /* AMD Hudson */
> +	SND_PCI_QUIRK(0x103c, 0x21fa, "HP", 0), /* AMD Hudson */
>  	SND_PCI_QUIRK(0x1043, 0x81f2, "ASUS", 0), /* Athlon64 X2 + nvidia */
>  	SND_PCI_QUIRK(0x1043, 0x81f6, "ASUS", 0), /* nvidia */
>  	SND_PCI_QUIRK(0x1043, 0x822d, "ASUS", 0), /* Athlon64 X2 + nvidia MCP55 */
> -- 
> 1.7.9.5
>