Comment 32 for bug 1414706

The following scenarios were tested. this issue could be reproduced.

Please note for case [4] and [5] was tested with updated BIOS (GIET53WW → GIET78WW)
(I hasn't accessed the same BIOS revision yet)

kernel/HDA DKMS/bios - result, also info attachment

[1] 3.13.0-46, HDA DKMS (0.201502151246~ubuntu14.04.1), GIET53WW (2.01) - could reproduce this bug (recorded noise),
[2] 3.13.0-46, HDA DKMS (0.201503201631~ubuntu14.04.1), GIET53WW (2.01) - could not enable the audio (shown as Dummy), 201307-14019_150324-02.log
[3] 3.13.0-46, without HDA DKMS, GIET53WW (2.01), GIET53WW (2.01) - could reproduce this bug (recorded noise), 201307-14019_150324-03.log
[4] 3.13.0-46, HDA DKMS (0.201503201631~ubuntu14.04.1), GIET78WW 2.28 - could not enable the audio (shown as Dummy), 201307-14019_150324-04.log
[5] 3.13.0-46, without HDA DKMS, GIET53WW (2.01), GIET78WW 2.28 - could reproduce this bug (recorded noise), 201307-14019_150324-05.log

in case [4] and [5], I could not access dump_coef because no such path /sys/module/snd_hda_codec/parameters/dump_coef
(I didn't try to access dump_coef in case [1] [2] [3] so I could not tell whether they are the same.)

I will test with a clean 14.04.1 installation with this updated bios (GIET78WW 2.28) again to avoid mutiple package/dkms installation/purging to cause a dirty environment and make sure the test quality. I will also attach alsa-info log with dump_coef on if possible.