linux-kernel - Re: [git pull] Input updates for 2.6.35-rc0

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Message-ID: <20100528024646.GA21961@core.coreip.homeip.net>
Date:	Thu, 27 May 2010 19:46:46 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Florian Ragwitz <rafl@...ian.org>, Arjan Opmeer <arjan@...eer.net>,
	Eric Piel <eric.piel@...mplin-utc.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org
Subject: Re: [git pull] Input updates for 2.6.35-rc0

On Thu, May 27, 2010 at 06:53:20PM -0700, Linus Torvalds wrote:
> 
> 
> On Thu, 20 May 2010, Dmitry Torokhov wrote:
> > 
> > Dmitry Torokhov (17):
> >       Input: elantech - enforce common prefix on messages
> >       Input: elantech - relax signature checks
> 
> These two commits (I _think_ - I didn't actually bisect it) seem to result 
> in a Dell Inspiron bootup message changing from:
> 
> 	input: ImPS/2 Logitech Wheel Mouse as /devices/platform/i8042/serio1/input/input5
> 
> to
> 
> 	elantech: assuming hardware version 2, firmware version 4.3.1
> 	elantech: Synaptics capabilities query result 0x08, 0x18, 0x0c.
> 	input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input5
> 
> and the end result is a total disaster. In the words of my daughter, whose 
> laptop this is:
> 
> 	Subject: Computer=awful
> 
> 	I am not able to click by tapping, I actually have to press down.. It's
> 	really frustrating and I want it fixed.
> 
> and having tested it, I have to agree. It's beyond awful. It's absolutely 
> disgusting, and the touchpad went from "quite usable" (with tapping, 
> double-tapping, scroll-wheel on the right side etc) to "totally unusable". 
> The buttons you have to press (since tapping doesn't work) are on the 
> touch-pad itself, and it's basically a total pain.
> 
> The scroll-wheel emulation still seems to work, but tapping has gone away. 
> I'm reading the docs, and they say that you can do magic things with the 
> raw registers, but if I'm looking at the register contents they seem to 
> say that tapping _is_ enabled. It just doesn't work.
> 
> So it would seem that the "non-native" PS/2 emulation of that thing is way 
> better than the native driver, and we should _not_ try to treat it as a 
> touchpad. We're better off leaving it in ImPS/2 mode.
>

*sigh*

I do hope we will sort it out because there is a demand to make it use
Synaptics driver so it is configurable. Any chance I could persuade you
to stick "options psmouse proto=imps" in your daughter's laptop for the
time being? If we can't make it work reasonably in the next 2-3 rcs
we'll revert autodetection to what it was before.

Is it Mini 10 BTW?

Thanks.

-- 
Dmitry
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