Raymond Yau superquad.vortex2@gmail.com [2015-05-01 22:22:15 +0800]:
Here are the XXX messages:
[ 13.722755] sound hdaudioC0D0: XXX hda_fixup_thinkpad_acpi init... [ 13.724366] sound hdaudioC0D0: XXX ok, this is thinkpad [ 13.724373] sound hdaudioC0D0: XXX mute LED NOT WORKING!This mean that your thinkpad does not support SSMS interface
Yes, this was confirmed by an experiment later in the PA thread suggested by Takashi, in which attempted access to the SSMS device yielded ENODEV.
Seems to me the next step then is to try to determine the difference between the following two possibilities:
a. The SSMS interface is truly not available on the T-510.
b. There is a bug in thinkpad_acpi (or elsewhere?) which is preventing the SSMS interface from being visible, hence leading to ENODEV upon attempted access.
Henrique: Can you comment on how best to proceed further here? Let me know if there's any experiments I can do on my end to narrow this down as either (a) or (b).
[ 13.724374] sound hdaudioC0D0: XXX ok, mic LED is hookedThis mean that your thinkpad support MMTS interface
Yes, as stated in the original report, there is no issue at all with the MIC MUTE LED.
Do T420 support SSMS interface ?
Good question. I have no access to T-420. Does anyone know for sure?