just change the device type of pin default of four pin complex of the output jack from AC_JACK_SPEAKER to AC_JACK_LINE_OUT
/* device device types (0x0-0xf) */ enum { AC_JACK_LINE_OUT, AC_JACK_SPEAKER, AC_JACK_HP_OUT, AC_JACK_CD, AC_JACK_SPDIF_OUT, AC_JACK_DIG_OTHER_OUT, AC_JACK_MODEM_LINE_SIDE, AC_JACK_MODEM_HAND_SIDE, AC_JACK_LINE_IN, AC_JACK_AUX, AC_JACK_MIC_IN, AC_JACK_TELEPHONY, AC_JACK_SPDIF_IN, AC_JACK_DIG_OTHER_IN, AC_JACK_OTHER = 0xf, }; -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1041322 Title: Very low sound on HP p7-1227c To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1041322/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs