Headphones don't work for aluminum iMac

Reported by Jeff Mings on 2009-04-14
14
This bug affects 3 people
Affects Status Importance Assigned to Milestone
ALSA driver
New
Unknown
Mactel Support
Undecided
Unassigned

Bug Description

Hello!
    For the most part, the Jaunty beta is working very nicely on my intel iMac. This aluminum 20" imac reports 7,1 using dmidecode. Under 8.04 and 8.1 as well, I have been able to hear lower quality sounds through the built-in speakers using either of these additions to alsa-base.conf:

options snd-hda-intel model=mbp3
or
options snd-hda-intel model=imac24.

Unfortunately, the sound quality seems impaired, and I haven't been able to get the headphones to work at all. Using the default alsa-base.conf gives very low amplitude headphone output that requires a lot of amplification to hear; no internal speaker output is heard with the default.

    Here's the output from aplay -l:

**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC885 Analog [ALC885 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC885 Digital [ALC885 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

    cat /proc/asound/cards:

 0 [Intel ]: HDA-Intel - HDA Intel
                      HDA Intel at 0x90700000 irq 20

I have also attached the output from dmidecode.

Please let me know if I can furnish any other information or assist in the resolution of this sound problem.

Aloha,
-Jeff Mings

Jeff Mings (jeffm-lava) wrote :
Jeff Mings (jeffm-lava) wrote :
Jeff Mings (jeffm-lava) wrote :

Addition:
I have used alsamixer, which is another great old-school terminal app :), to ensure that all relevant channels are turned up and not muted. I've looked through a lot of postings and tried many different possibilities on Heron, Ibix and Jaunty Jackalope beta.

Russ Brown (macmanui) wrote :

I was having the same problems and the information here definitely improved things - so maybe it'll help things along here too:

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4086

Jeff Mings (jeffm-lava) wrote :

Thanks Russ!

    Using this magical option in alsa-base.conf proved to be the fix:
model=asus-a7m

    I found this by following Russ's link. I didn't need to re-compile Alsa! I simply needed to add the lines:

# iMac option
options snd-hda-intel model=asus-a7m

to alsa-base.conf in /etc/modprobe.d

and run alsamixer and turn on all of the devices.
Additionally, the internal microphone works quite nicely! The iMac has a line-in rather than a standard mike jack, so I haven't tested that, but I expect that we can consider this closed nonetheless.

Aloha,

-Jeff Mings

Jeff Mings (jeffm-lava) wrote :

Hmmm....

    Unfortunately, after booting into the Mac OSX partition and running some updates, the headphone jack no longer works. At least I still have good sound from the internal speakers. After trying unsuccessfully to use the headphone jack, I tried my Logitech USB headphones. After selecting/enabling the relevant settings, they work and sound very good. Using a USB sound device may be the simplest thing to do for now.

Aloha,

-Jeff Mings

Nicolas Jungers (unbug) wrote :
Download full text (3.5 KiB)

I'm on karmic with the /etc/modprobe.d/option: options snd-hda-intel model=imac24
on an iMac 24" alu, model 2008 and the jack output doesn't work and doesn't even appears as available option.

uname -a
Linux i24 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:53:52 UTC 2009 x86_64 GNU/Linux

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC889A Analog [ALC889A Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC889A Digital [ALC889A Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

hwinfo --sound
13: PCI 1b.0: 0403 Audio device
  [Created at pci.318]
  UDI: /org/freedesktop/Hal/devices/pci_8086_284b
  Unique ID: u1Nb.2frKzjmhZt4
  SysFS ID: /devices/pci0000:00/0000:00:1b.0
  SysFS BusID: 0000:00:1b.0
  Hardware Class: sound
  Model: "Intel 82801H (ICH8 Family) HD Audio Controller"
  Vendor: pci 0x8086 "Intel Corporation"
  Device: pci 0x284b "82801H (ICH8 Family) HD Audio Controller"
  SubVendor: pci 0x106b "Apple Computer Inc."
  SubDevice: pci 0x00a0
  Revision: 0x03
  Driver: "HDA Intel"
  Driver Modules: "snd_hda_intel"
  Memory Range: 0xd0700000-0xd0703fff (rw,non-prefetchable)
  IRQ: 20 (8004 events)
  Module Alias: "pci:v00008086d0000284Bsv0000106Bsd000000A0bc04sc03i00"
  Driver Info #0:
    Driver Status: snd_hda_intel is active
    Driver Activation Cmd: "modprobe snd_hda_intel"
  Config Status: cfg=new, avail=yes, need=no, active=unknown

lspci
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Fam...

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Changed in alsa-driver:
status: Unknown → New
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