Sound isn't working on MacBook 5,2

Try this. Open /etc/modprobe.d/alsa-base.conf in an editor, and at the end of this line:

options snd-hda-intel power_save=10 power_save_controller=N

Add "model=mb5" like this:

options snd-hda-intel power_save=10 power_save_controller=N model=mb5

Then reboot, and let me know whether you get sound.

 affects ubuntu/alsa-driver
 status incomplete

I've tried that, but still no sound. I do, however, hear the speakers kind of popping (for want of a better word) during the logon process.

Have you tried installing linux-backports-modules-alsa-karmic and rebooting?

On Oct 30, 2009 6:45 AM, "David Stansby" <email address hidden> wrote:

I've tried that, but still no sound. I do, however, hear the speakers
kind of popping (for want of a better word) during the logon process.

** Changed in: alsa-driver (Ubuntu)
      Status: Incomplete => New

-- Sound isn't working on MacBook 5,2
https://bugs.launchpad.net/bugs/463178You received this bug...

I've just installed linux-backports-modules-alsa-karmic and I'm still just getting a slight popping sound from the speakers during the login sequence.

This is still a problem in the latest version of karmic

Just upgraded to Lucid, and sound is working fine for me.

I've just done a fresh install of Lucid, and sound isn't working again. It must've been some jiggerypokery that I'd done last time to get it working.

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I've just run the alsa shell script, and my sound details can be found here: http://www.alsa-project.org/db/?f=cea0317330f90927f7d155012081c30a38f35465

Could you please add the following line to /etc/modprobe.d/alsa-base.conf

options snd-hda-intel model=mb5

Once added, save the file, and reboot. Please report back as to whether you have sound working after the reboot.

Thanks

 affects ubuntu/alsa-driver
 status incomplete

After adding that line my audio works fine, albeit it sounds a bit tinny.

Ok, thats a start. Are you able to get rid of the tinny sound by adjusting volume settings?

In the meantime, I'll send a patch upstream to make the model-mb5 setting for your hardware perminant, thereby eliminating the need for the options line. This change should land in the final maverick kernel.

 affects ubuntu/alsa-driver
 status triaged

Cheers, now working out of the box :)

SRU Justification

Impact: The upstream process for stable tree updates is quite similar in scope to the Ubuntu SRU process, e.g., each patch has to demonstrably fix a bug, and each patch is vetted by upstream by originating either directly from Linus' tree or in a minimally backported form of that patch.

The 2.6.32.21 upstream stable patch set is now available and contains fixes for this problem. It should be included in the Ubuntu kernel as well.

Related commits in the Ubuntu Lucid repo are:

b287a55 ALSA: hda - Add Macbook 5,2 quirk

Accepted linux into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

We need some testing of the proposed kernel to see whether this has been resolved - please see comment #24 for information about how to get the proposed kernel.

Thanks

This bug was fixed in the package linux - 2.6.32-25.44

---------------
linux (2.6.32-25.44) lucid-proposed; urgency=low

  [ Brad Figg ]

  * SAUCE: (no-up) Modularize vesafb -- fix initialization
    - LP: #611471

  [ Stefan Bader ]

  * Revert "SAUCE: sync before umount to reduce time taken by ext4 umount"
    - LP: #543617, #585092

  [ Steve Conklin ]

  * Revert "SAUCE: tulip: Let dmfe handle davicom on non-sparc"
    - LP: #607824

  [ Tim Gardner ]

  * [Config] Added ums-cypress to udeb
    - LP: #576066

  [ Upstream Kernel Changes ]

  * Revert "PCI quirk: Disable MSI on VIA K8T890 systems"
    - LP: #607824
  * Revert "PCI quirks: disable msi on AMD rs4xx internal gfx bridges"
    - LP: #607824
  * Revert "(pre-stable) Input: psmouse - reset all types of mice before
    reconnecting"
    - LP: #607824
  * Revert "jbd: jbd-debug and jbd2-debug should be writable"
    - LP: #607824
  * Revert "ext4: Make fsync sync new parent directories in no-journal
    mode"
    - LP: #615548
  * Revert "ext4: Fix compat EXT4_IOC_ADD_GROUP"
    - LP: #615548
  * Revert "ext4: Conditionally define compat ioctl numbers"
    - LP: #615548
  * Revert "ext4: restart ext4_ext_remove_space() after transaction
    restart"
    - LP: #615548
  * Revert "ext4: Clear the EXT4_EOFBLOCKS_FL flag only when warranted"
    - LP: #615548
  * Revert "ext4: Avoid crashing on NULL ptr dereference on a filesystem
    error"
    - LP: #615548
  * Revert "ext4: Use bitops to read/modify i_flags in struct
    ext4_inode_info"
    - LP: #615548
  * Revert "ext4: Show journal_checksum option"
    - LP: #615548
  * Revert "ext4: check for a good block group before loading buddy pages"
    - LP: #615548
  * Revert "ext4: Prevent creation of files larger than RLIMIT_FSIZE using
    fallocate"
    - LP: #615548
  * Revert "ext4: Remove extraneous newlines in ext4_msg() calls"
    - LP: #615548
  * Revert "ext4: init statistics after journal recovery"
    - LP: #615548
  * Revert "ext4: clean up inode bitmaps manipulation in ext4_free_inode"
    - LP: #615548
  * Revert "ext4: Do not zero out uninitialized extents beyond i_size"
    - LP: #615548
  * Revert "ext4: don't scan/accumulate more pages than mballoc will
    allocate"
    - LP: #615548
  * Revert "ext4: stop issuing discards if not supported by device"
    - LP: #615548
  * Revert "ext4: check s_log_groups_per_flex in online resize code"
    - LP: #615548
  * Revert "ext4: fix quota accounting in case of fallocate"
    - LP: #615548
  * Revert "ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode"
    - LP: #615548
  * Revert "ext4: rename ext4_mb_release_desc() to ext4_mb_unload_buddy()"
    - LP: #615548
  * Revert "ext4: Remove unnecessary call to ext4_get_group_desc() in
    mballoc"
    - LP: #615548
  * Revert "ext4: fix memory leaks in error path handling of
    ext4_ext_zeroout()"
    - LP: #615548
  * Revert "ext4: check missed return value in ext4_sync_file()"
    - LP: #615548
  * Revert "ext4: Issue the discard operation *before* releasing the blocks
    to be reused"
    - LP: #615548
  * Revert "ext4: Fix buffer head leaks after calls to
    ext4_get_inode_loc()"
    - LP: #615548
  * Revert "ex...