Hey, I own a Notebook 7 and was having the same problem with the headphone jack (sound very low and distorted). I managed to solve based on the solution at
https://bbs.archlinux.org/viewtopic....98849#p1898849. Basicaly, I created the files at /lib/firmware/alc256-sound-patch.fw with the content
Code:
[codec]
0x10ec0256 0x144dc824 0
[verb]
0x1a 0x707 0x05
and at /etc/modprobe.d/alc256-sound-patch.conf with content
Code:
options snd-hda-intel patch=alc256-sound-patch.fw
Reboot, and you should have sound working even after reboots.
The values may differ in the codec line, but it's all explained at the link I put. You may test before applying the patch with the command
Code:
sudo hda-verb /dev/snd/hwC0D0 0x1a 0x707 0x05
(the sound must be playing and headphones connected, but it will no persist after reboot)
