Red Hat Bugzilla – Bug 625188
MacBookPro 7,1: bad default volumes, needs snd_pci_quirk
Last modified: 2012-08-16 14:29:09 EDT
Created attachment 439493 [details]
New MacBookPro7,1 has an audio chipset similar to (but with a different subsystem ID than) the mbp55 - I get no audio unless I put the following in /etc/modprobe.d/sound.conf:
options snd_hda_intel model=mbp55
I added SND_PCI_QUIRK(0x10de, 0xcb89, "MacBookPro 7,1", CS420X_MBP55) to sound/pci/hda/patch_cirrus.c and the device (mostly) works as expected.
As for the mixer problem - it starts up with the "Front Speaker" mixer element muted and at 0 volume. Using alsamixer / alsactl store I've got this fixed as well.
Created attachment 439494 [details]
you could try submitting this upstream also - when I came across a similar situation I sent the patch upstream and it was adopted pretty promptly.
it also means I have a bona fide kernel commit to my name :P
Fedora Bugzappers volunteer triage team
I'd like to figure out a fix for the default mixer settings being wrong as well - but yeah, perhaps this simple patch is ready for upstream by itself.
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