magic-neophyte
February 8th, 2010, 02:45 PM
I have Karmic Koala 9.10 working (near) perfectly on my iMac7,1, as identified by
sudo dmidecode -s system-product-name
NOTE: See below for Lucid 10.04 update to these instructions
IMPORTANT: You need to complete the installation procedure while connected to internet via the WIRED network. Then you can enable the wireless by installing the restricted drivers, after the install is complete. Also the fglrx ATI Video driver is effortlessly installed via Menu > System > Administration > Hardware Drivers
The sound card gave me some trouble, as it is an Intel HDA Model, reported as 'Codec: Realtek ALC889A' by
cat /proc/asound/card0/codec#0 | grep Codec
It shows up in lspci as:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
It sounded rather tinny at first, when I tried mbp3 and other model names. Then I added the following line to /etc/modprobe.d/alsa-base.conf :
options snd-hda-intel model=mb31 power_save=10 power_save_controller=N
After reboot, my sound is full and can be put much louder than before. Jack detection works. Some people might have to leave out the power saving options. See below.
dmesg reports:
[ 12.060481] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[ 12.060508] HDA Intel 0000:00:1b.0: setting latency timer to 64
Sources consulted are mostly the kernel documentation ( Enter into the terminal: sudo apt-get install linux-doc
The relevant info can be found in HD-Audio-Models.txt.gz and HD-Audio.txt.gz in /usr/share/doc/linux-doc/sound/alsa )
sudo dmidecode -s system-product-name
NOTE: See below for Lucid 10.04 update to these instructions
IMPORTANT: You need to complete the installation procedure while connected to internet via the WIRED network. Then you can enable the wireless by installing the restricted drivers, after the install is complete. Also the fglrx ATI Video driver is effortlessly installed via Menu > System > Administration > Hardware Drivers
The sound card gave me some trouble, as it is an Intel HDA Model, reported as 'Codec: Realtek ALC889A' by
cat /proc/asound/card0/codec#0 | grep Codec
It shows up in lspci as:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
It sounded rather tinny at first, when I tried mbp3 and other model names. Then I added the following line to /etc/modprobe.d/alsa-base.conf :
options snd-hda-intel model=mb31 power_save=10 power_save_controller=N
After reboot, my sound is full and can be put much louder than before. Jack detection works. Some people might have to leave out the power saving options. See below.
dmesg reports:
[ 12.060481] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[ 12.060508] HDA Intel 0000:00:1b.0: setting latency timer to 64
Sources consulted are mostly the kernel documentation ( Enter into the terminal: sudo apt-get install linux-doc
The relevant info can be found in HD-Audio-Models.txt.gz and HD-Audio.txt.gz in /usr/share/doc/linux-doc/sound/alsa )