From: Linus Torvalds on


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.

Linus
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From: Dmitry Torokhov on
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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From: Dave Airlie on
On Fri, May 28, 2010 at 11:53 AM, Linus Torvalds
<torvalds(a)linux-foundation.org> 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.
>

Was this in GNOME?

Does System->Preferences->Mouse have a touchpad tab? do it have tapping off?

Dave.
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From: Linus Torvalds on


On Thu, 27 May 2010, Dmitry Torokhov wrote:
>
> 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?

You mean "psmouse.proto=imps" on the command line, I presume.

> Is it Mini 10 BTW?

No. It's a Inspiron 11z. Much better CPU, better screen, yet still pretty
small.

Linus
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From: Linus Torvalds on


On Thu, 27 May 2010, Dmitry Torokhov wrote:
>
> So I take it we can leave the touchpad in Enaltech mode for now?

Oh yes, no problem. Now it's more of a gnome issue than anything else,
but I don't care deeply. It was the change of behavior that threw me and
made it look like a kernel regression. If it had always worked that way,
I'd probably even have noticed the touchpad configuration when installing
the machine.

Linus
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