On 2015-05-23 18:06, Raymond Yau wrote:
2015-5-23 下午4:50 於 "Jan Kiszka" jan.kiszka@web.de 寫道：
>>>>>>> Most Thinkpad Edge series laptops use conexant codec, so far >>>>>>> although > <snip> >>>> Is there anything I can debug or any information I can collect >>>> from my >>>> box to examine this? >>> What is the linux distribution on your machine? And use showkey to >>> catch >>> the keycode of that button. >> I'm running OpenSUSE 13.1. The reported keycode of the power >> button is >> 116. > It seems the keycode is correct, it is power keycode rather the mute > keycode. > > Could you please do some debug, let us find which line of code is
the
> root cause for this problem. for example: > > after running the line, the problem shows up: > > 1. if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, > &found, NULL)) && found) // in the sound/pci/hda/thinkpad_helper.c, > is_thinkpad() This evaluates to true
> 2. return ACPI_SUCCESS(acpi_get_devices("IBM0068",
acpi_check_cb,
> &found, NULL)) && found; // same as above > > 3. if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { //in the > sound/pci/hda/thinkpad_helper.c, hda_fixup_thinkpad_acpi() ...and this
> 4. if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { // same as > above > ...and this as well. spec->num_adc_nids is 1.
If we change the code like below, does the power button can work well?
in the thinkpad_helper.c, hda_fixup_thinkpad_acpi()
if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { /* old_vmaster_hook = spec->vmaster_mute.hook; spec->vmaster_mute.hook = update_tpacpi_mute_led; removefunc = false; */Disabling only this block resolves the issue.
So Below two lines make the power button change to the reset button.
drivers/platform/x86/thinkpad_acpi.c mute_led_on_off():
acpi_get_handle(hkey_handle, "SSMS", &temp); acpi_evalf(hkey_handle, &output, "SSMS", "dd", 1);
@alexhung, Do you have any idea why this can affect the power button behavior?
I think we all lost track of this issue, but it unfortunately still exists in the latest kernel, requiring custom builds here. How can we proceed?
http://mailman.alsa-project.org/pipermail/alsa-devel/2015-May/091561.html
If you cannot find "SSMS" in your T520 ACPI dump, this mean mute LED cannot be turn on/off similar to T510
There is an entry (see attached disassembly), but this device has at least no physical LED to drive.
Jan