Sound does not work on Sony VAIO VPCEC1M1E

Problem:

• After installing Linux on a Sony VAIO VPCEC1M1E, the sound card is recognized correctly but the sound does not work.

Solution:

• This is a known bug. For more details, see [1].
• To solve this issue, you have to modify a sound card key using hda-analyzer [2].
• Get the basic run.py script:

wget -O run.py http://www.alsa-project.org/hda-analyzer.py

• Execute it:

python run.py

• Go to Node[0x19] PIN (left hand side pane) -> Widget Control (right hand side pane) -> change the value of VREF to HIZ.

Note:

• The following instructions describe how to set the sound card key automatically at each reboot of the system.
• Download the following file and extract it:

ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/misc/hda-verb/hda-verb-0.3.tar.gz

• Go to the directory and compile the program using make:

make

• Copy the compiled program to /usr/bin:

cp hda-verb /usr/bin

• Open the file /etc/rc.local:

vi /etc/rc.local

• And insert the following line:

/usr/bin/hda-verb /dev/snd/hwC0D0 0x19 SET_PIN_WIDGET_CONTROL 0x22

• Save the file and reboot the system.