linux-kernel - Re: [GIT PULL] platform-drivers-x86 for 3.19

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Message-ID: <20150112203003.GB23277@node.dhcp.inet.fi>
Date:	Mon, 12 Jan 2015 22:30:03 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Andrew Lutomirski <luto@....edu>
Cc:	Darren Hart <dvhart@...radead.org>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] platform-drivers-x86 for 3.19

On Mon, Jan 12, 2015 at 12:05:45PM -0800, Andrew Lutomirski wrote:
> On Mon, Jan 12, 2015 at 12:03 PM, Kirill A. Shutemov
> <kirill@...temov.name> wrote:
> > On Mon, Jan 12, 2015 at 10:42:11AM -0800, Andrew Lutomirski wrote:
> >> On Mon, Jan 12, 2015 at 10:38 AM, Darren Hart <dvhart@...radead.org> wrote:
> >> > On Mon, Jan 12, 2015 at 12:58:02AM +0200, Kirill A. Shutemov wrote:
> >> >> On Thu, Dec 18, 2014 at 09:51:27AM -0800, Darren Hart wrote:
> >> >> > thinkpad-acpi using software mute simplifies the driver and the user experience
> >> >> > significantly.
> >> >>
> >> >> Except when it doesn't.
> >> >>
> >> >> I'm probably in minority, but I don't use fancy userspace to mess with my
> >> >> mixer and the mute button worked just fine for me before the change.
> >> >> Wasted half an hour to find out what happened is not a pure win from user
> >> >> experience point of view.
> >> >>
> >> >> Is it really necessary to have software_mute_requested == true by default?
> >> >> Can fancy userspace ask for desired behaviour instead and change kernel to
> >> >> not send hotkeys change notification until software_mute is enabled?
> >> >>
> >> >> --
> >> >>  Kirill A. Shutemov
> >> >>
> >> >
> >> > Thanks for the report Kirill,
> >> >
> >> > Andy, we're at RC4, so if we need to fix (or revert) this fix, we only have a
> >> > couple weeks to do so.
> >> >
> >> > Kirill, to define the scope of the problem, if you specify
> >> > software_mute_requested as false on the kernel command line, does your system
> >> > function as expected?
> >>
> >> If I understood Kirill's email correctly, the only issue is that he
> >> liked the old behavior.  Kirill, is that correct?
> >
> > Yes. For now I use thinkpad_acpi.software_mute=0 to get old behaviour.
> >
> 
> What aspect of the old behavior is better than the new default behavior?

It's not necessary better. The new behavior just broke my use-case.

I don't have anything in my system what would react on KEY_MUTE and I used
the functionality platform provides until it suddenly stopped working.

I personally can live with new thinkpad_acpi. I'll probably update my
configuration to react on the software button.

But who else will get frustrated after update to v3.19?

-- 
 Kirill A. Shutemov
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