On Sun, 26 Apr 2009, Yang Zhe wrote:
> By echo 0x30 0x** > ecdump, I discover something...
>
> In the driver thinkpad_acpi.c, file /proc/acpi/ibm/volume is handled
> in lines 5652~5737, function volume_read(), volume_write(), and it's
> read through acpi_ec_read(). But in function hotkey_read_nvra
On Sun, 26 Apr 2009, Yang Zhe wrote:
> > Does the mute command from /proc/acpi/ibm/volume causes MUTE to activate?
> Yes.
> The only thing goes wrong is that with mute button pressed, the volume
> byte becomes 0x4*, * is the level. By echo mute > volume, it becomes
> 0xc*. c & 4 = 4.
>
> Great tha
I have some strange idea in the past when I'm debugging tpb's code.
After I detect a mute state, I immediately toggle the mute property
the PCM in ALSA, then unmute the hardware.
Now I can detect mute again. Therefore once the button is pressed, the
mute property is toggled.
But it seems tricky.
> Does the mute command from /proc/acpi/ibm/volume causes MUTE to activate?
Yes.
The only thing goes wrong is that with mute button pressed, the volume
byte becomes 0x4*, * is the level. By echo mute > volume, it becomes
0xc*. c & 4 = 4.
Great thanks if you can do something around ALSA. As far as
May I ask a simple question?
What's the difference between ec and nvram?
By echo 0x30 0x** > ecdump, I discover something...
In the driver thinkpad_acpi.c, file /proc/acpi/ibm/volume is handled
in lines 5652~5737, function volume_read(), volume_write(), and it's
read through acpi_ec_read(). But i
On Sat, 25 Apr 2009, Yang Zhe wrote:
> As a good news, the mute bit in the volume byte is correct in ANY
> times, even if someone is doing some funny thing with the volume in
> procfs.
That gives me enough to talk to Lenovo, thanks!
> > How does mute and volume work in Windows? How do they behav
> And you didn't tell me if the thinkpad-acpi driver does see changes in the
> mute state properly, yet. Please confirm that (but do NOT try to change the
> volume, just check if the driver reports the mute state correctly, comparing
> it with the mute led when you press the mute key, press it mul
On Sat, 25 Apr 2009, Yang Zhe wrote:
> Thank you for your responce.
>
> Now let's focus on the mute key..
It is not a key. It is a button that is entirely handled by the firmware
inside the embedded controller.
And you didn't tell me if the thinkpad-acpi driver does see changes in the
mute stat
Thank you for your responce.
Now let's focus on the mute key..
If I plugged a headphone, the mute key won't mute the sound in
headphone, then the mute key is lack of functional..
So that I think it's better to send a keycode, or emulate a keycode
against the mute bit.
--
On Mon, 20 Apr 2009, Yang Zhe wrote:
> Volume mute key doesn't produce any keycode to system.
Mute is done on hardware. It may be reflected somewhere in the HDA
mixer (I don't know), and in the EC register space, but it does not
send keycodes.
> And I find that, after I echo up/down/mute/level
10 matches
Mail list logo
