lkml.org 
[lkml]   [2018]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectThinkPad T480s & LED_MUTE, LED_MICMUTE
Hi! With up-to-date thinkpad_acpi.ko driver on ThinkPad T480s I'm seeing
a strange behavior of LEDs which are integrated into mic mute (Fn+F4)
and mute (Fn+F1) keys.

When thinkpad_acpi.ko is not loaded, then mute key is working fine. When
pressed, it correctly generates KEY_MUTE on AT Translated Set 2 keyboard
input device and also turn on/of mute led. But when micmute key is
pressed then, nothing happen. No key event is reported and also led is
not turned on/off.

On the other hand, when thinkpad_acpi.ko is loaded, then both buttons
mute and micmute correctly generates input events; mute via AT keyboard
and micmute via ThinkPad Extra Buttons. But led is not changed. When
thinkpad_acpi.ko is loaded it turn off both leds (mute and micmute) and
leds after pressing any of those buttons, leds are not turned on again.

When thinkpad_acpi.ko is unloaded, then pressing mute button again start
switching led on/off.

So it seems that some init sequence of thinkpad_acpi.ko breaks mute led.
And fini sequence of thinkpad_acpi.ko makes mute led working again.

--
Pali Rohár
pali.rohar@gmail.com

\
 
 \ /
  Last update: 2018-06-08 13:12    [W:0.087 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site