I have the same soundcard you have (Realtek ALC888) and had the same
problem (low sound) before (Mainboard MSI P35 Neo-F)
I added to my /etc/modprobe.d/alsa-base the following line:
options snd-hda-intel model=6stack-dig
I read the Alsa Config File and this one seemed to be the correct one
for me (6stacks on the back, 2 front and a not used digital out)
Perhaps it is worth a try for you.
Before trying:
dmesg |grep -i alc
should report something about unknown HDA model, asking bios iirc.
you can control with alsamixer -c0 or the gnome mixer applet the
headphone (enable / disable). Please make sure to get a reasonable loud
output for both "green outputs" Front and Back - one slider for both -
while adjusting "front" to max.
Other model options for your hardware:
ALC883/888
3stack-dig 3-jack with SPDIF I/O
6stack-dig 6-jack digital with SPDIF I/O
3stack-6ch 3-jack 6-channel
3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
6stack-dig-demo 6-jack digital for Intel demo board
acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
acer-aspire Acer Aspire 9810
medion Medion Laptops
medion-md2 Medion MD2
targa-dig Targa/MSI
targa-2ch-dig Targs/MSI with 2-channel
laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
lenovo-101e Lenovo 101E
lenovo-nb0763 Lenovo NB0763
lenovo-ms7195-dig Lenovo MS7195
haier-w66 Haier W66
3stack-hp HP machines with 3stack (Lucknow, Samba boards)
6stack-dell Dell machines with 6stack (Inspiron 530)
mitac Mitac 8252D
clevo-m720 Clevo M720 laptop series
fujitsu-pi2515 Fujitsu AMILO Pi2515
auto auto-config reading BIOS (default)
Source:
zless /usr/share/doc/alsa-base/driver/ALSA-Configuration.txt.gz
Please report back if this makes the sound louder for you!
--
Realtek ALC888 low sound
https://bugs.launchpad.net/bugs/217789
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