Volume mute key doesn't produce any keycode to system.
And I find that, after I echo up/down/mute/level <N> >
/proc/acpi/ibm/volume, then read the nvram immediately, i find the
volume byte is strange..
For example, the initial volume level is 15, unmuted, the byte is 0x0f
after echo down > volume, it becames 0x8e. Then I pressed the mute key
and then volume up key, it turns to 0x4e and 0x0e (this two values are
correct)
now I echo up > volume, it becames 0x8e, not 0x0f. but
cat volume shows that the volume is 15.
more misteris position can be obtained as follows.
echo level 1 > volume, press the mute key and up key. The byte become
0x01, echo level 8 > volume, the byte comes 0x81
echo level 1 > volume, press the mute key and up key. The byte become
0x01, echo level 9 > volume, the byte comes 0x01
(wether 8 occur depend on wether the difference of level is even or odd)
now echo mute > volume, the byte comes 0xc1. and the sounds are not muted.
I think that there is something wrong with the handle of the volume
key, but i have a sketch on the code and can't figure it out.
--
Sincerely,
Yang Zhe
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