[ltp] Re: [PATCH] Set osi=Linux for the ThinkPad X200s

[Pedro Ribeiro]

On Thu, Nov 26, 2009 at 5:02 PM, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
>> without this change the mute button breaks sound for everyone except
>> power users (who else is supposed to know to twiddle
>> /proc/acpi/ibm/volume or press "sound up" to get sound back when the
>
> Most/all the laptops I've seen until now behave like that: the "mute"
> button never unmutes.
>
> And as a user, after muting or changing the sound-level with
> those special keys, I find that the most obvious way to undo or refine
> such a change would be performed with those keys as well.
>
>
> =A0 =A0 =A0 =A0Stefan
>
> --
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad
>

I beg to differ.

All laptops I've seen to do that use the mute key to unmute (Lenovo,
Sony, HP, Asus, Acer,...).  In fact, I can't think of a single one
manufactured since 2004 which has the behaviour you describe.
I also think that is expected behaviour - why should I have to press
volume up to unmute sound? I don't want the sound a notch up, I want
it exactly at the same volume as it was before being muted.

With my T400 and without OSI(Linux) I can't use mute or volume down to
unmute, I have to notch up the volume with the volume up key. Very
annoying.

Oh and even with acpi_osi=3DLinux I can't get the headphone output mute.
Anyone has the same behaviour on the T400?