Hi Alex, On Aug 13, 2010, at 12:39 PM, Alexandru Csete wrote: > > Maybe it is a driver issue. I suppose your iMac is the latest > generation (late 2009?) but the distributed alsa drivers are usually > older.
Yes, my iMac 27" is a late 2009 model. $ sudo dmidecode -s system-product-name iMac11,1 > You can check how the hardware is detected in the hardware tab of the > audio settings or "lspci | grep Audio" and see how it fits with what's > actually in the computer. The following commands show the various hardware and codec installed on the iMac. I'm running it natively on the iMac 27 at the moment. Install required packages to enable audio. $ sudo apt-get install linux-backports-modules-alsa-lucid-generic gnome-alsamixer Find the Sound card model cat /proc/asound/card0/codec#0 | grep Codec Codec: Cirrus Logic CS4206 List all the audio PCI devices connected to the system $ sudo lspci | grep Audio 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06) 01:00.1 Audio device: ATI Technologies Inc HD48x0 audio Modify the alsa-base.conf file. $ sudo gedit /etc/modprobe.d/alsa-base.conf options snd-hda-intel power_save=10 power_save_controller=N model=imac27 For the Cirrus Logic CS4206/4207 chipset, the snd-hda-intel driver options parameter for the model is imac27 Do you think the two are matched? Best regards, Elvis Dowson
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