iMac 21.5 inch, no sound

[fastop]

Ive checked if anything was muted... But its all unmuted. Any help?

[jamesey]

try this
sudo apt-get install linux-backports-modules-alsa-karmic-generic

[fastop]

Thanks but it said it couldn't find the package! Is there any other ways of getting this?

[fastop]

I found the package on the ubuntu website and installed it from their instead. Still no sound...

[linuxopjemac]

can you give me the output of
sudo dmidecode -s system-product-name

[ZeroLinux]

You need to run Terminal and from there start alsamixer
Go to to Front Speaker and press "m" to unmute speaker

And to have backports you need to check all checkboxes in the first tab of repositories sources

BTW in Lucid sound works out of box but after unmuting front speaker in alsamixer
But Mic need to be boosted

[fastop]

When I do that it says: cannot open mixer: No such file or directory

[linuxopjemac]

in a terminal:
alsamixer

[fastop]

Oops sorry linuxopjemac (http://ubuntuforums.org/member.php?u=468914), i did not see your post before :D. When i run "sudo dmidecode -s system-product-name" in terminal
It says "iMac10,1"
And when i do "alsamixer" in the terminal it says "cannot open mixer: No such file or directory"

[linuxopjemac]

sudo apt-get update
sudo apt-get install alsa-utils
alsamixer

[fastop]

"joe@joe-desktop:~$ sudo apt-get install alsa-utils
Reading package lists... Done
Building dependency tree
Reading state information... Done
alsa-utils is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded."

Tried running alsamixer again but still said no such file or directory..

[linuxopjemac]

you could try gnome-alsamixer, but I don't understand you don't have alsamixer, really strange.

sudo apt-get install gnome-alsamixer

[fastop]

Okay I downloaded and installed that, I open it fine, click "edit" and "sound card properties" and it crashed. Maybe it could be due to the fact im using 10.04? As there are still some bugs.

[linuxopjemac]

aha, yes, that's possible...I don't know about Lucid Lynx (yet).

[fastop]

I think I will try a clean downgrade, and see if that fixes the problem! Its a shame because i really like 10.04 so far... Oh well, i will just have to wait until April :P

Thank you for your help :)

[ZeroLinux]

No, In lucid 10.04 sound works well. Just download (http://releases.ubuntu.com/10.04/ubuntu-10.04-beta1-desktop-amd64.iso) and install it. Sound works even from LiveCD without installation (unmute Front Speaker before) You can test sound from Folder examples right on Desktop. It really works without installing any additional packages. I have iMac 10.1 21.5 and know it for sure. You can daownload and see for youself.

[fastop]

Okay I installed 9.10, installed alsamixer, run it in terminal, pressed m to unmute. Still no sound...

[linuxopjemac]

sudo apt-get install linux-backports-modules-alsa-karmic-generic

reboot, then unmute again (if needed)...hopefully you have sound then

[xvila]

sudo apt-get install linux-backports-modules-alsa-karmic-generic

reboot, then unmute again (if needed)...hopefully you have sound then


Also, once the suggestions above have been followed, replace:


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

with

options snd-hda-intel model=imac27 power_save=10 power_save_controller=N

in the bottom line of the file

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

and reboot

It works in my new (March 10th) iMac 21.5

good luck

[fastop]

Also, once the suggestions above have been followed, replace:


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

with

options snd-hda-intel model=imac27 power_save=10 power_save_controller=N

in the bottom line of the file

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

and reboot

It works in my new (March 10th) iMac 21.5

good luck

Thankyou! This worked perfectly :)

[linuxopjemac]

great solution for the 10,1 imac...I will post it on my own website.