On Fri, Apr 17, 2015 at 09:57:49AM +0200, Martijn van Duren wrote:
> On 04/17/15 09:36, Alexandre Ratchov wrote:
> >On Fri, Apr 17, 2015 at 09:06:55AM +0200, Martijn van Duren wrote:
> >>Hello misc@,
> >>
> >>I just got a replacement system (iMac 12,1) at work, so I decided to go
> >>ahead and install OpenBSD on it. To do so I installed refind through debian
> >>and created a GPT/MBR hybrid.
> >>
> >>Most of the system runs perfectly (see dmesg pr0n below), but there are a
> >>couple of minor inconveniences:
> >>1) The sound from the speakers sound like they come from a cheap cellphone.
> >
> >You mean the level is to low? Does "mixerctl outputs.spkr_boost=on"
> >improves things?
> 
> It's not that the volume is low, but it sounds like it sounds rather high
> pitched and a narrow with a narrow bandwith.

Does undoing the gpio quirk for that subid change anything?

Index: sys/dev/pci/azalia_codec.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/azalia_codec.c,v
retrieving revision 1.165
diff -u -p -r1.165 azalia_codec.c
--- sys/dev/pci/azalia_codec.c  10 Dec 2014 14:18:11 -0000      1.165
+++ sys/dev/pci/azalia_codec.c  17 Apr 2015 09:03:22 -0000
@@ -65,8 +65,7 @@ azalia_codec_init_vtbl(codec_t *this)
        switch (this->vid) {
        case 0x10134206:
                this->name = "Cirrus Logic CS4206";
-               if (this->subid == 0xcb8910de ||        /* APPLE_MBA3_1 */
-                   this->subid == 0x72708086) {        /* APPLE_MBA4_1 */
+               if (this->subid == 0xcb8910de) {        /* APPLE_MBA3_1 */
                        this->qrks |= AZ_QRK_GPIO_UNMUTE_1 |
                            AZ_QRK_GPIO_UNMUTE_3;
                }

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