Re: [PATCH] Input: trackpoint - force 3 buttons if 0 button is reported

From: ulrik . debie-os
Date: Sun Jan 21 2018 - 15:29:20 EST

On Tue, Jan 16, 2018 at 03:07:13PM -0800, Dmitry Torokhov wrote:
Hi Dmitry,

> On Sat, Jan 13, 2018 at 10:34:19AM +0800, Aaron Ma wrote:
> > Will your patch go to stable kernel?
> > If yes, that's fine.
> Hmm, it looks like we need this patch after all as we do have screwy
> Lenovos with apparently 0x01 devices reporting 0 buttons. From
> thinkpad_acpi: ThinkPad BIOS R0DET87W (1.87 ), EC unknown
> thinkpad_acpi: Lenovo ThinkPad E470, model 20H1004SGE
> psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 0/0
> I'll ask them to try my patch and if it is indeed 0x01 device I'll apply
> your patch.

It is quite strange. In the past,for commit 293b915fd9be
"Input: trackpoint - assume 3 buttons when buttons detection fails" there was
success reported for lenovo e470 and I see the same success report in that
bugzilla ticket. I can also report success on lenovo e570.

But some seem to have problems, could it be that they are not including that
commit in the kernel they are running ? Or did a bios upgrade change the
behaviour ?
It would be best when we have a confirmation from a e470 owner that without the
proposed patch from Aaron the middle button does not work on his e470, and it
works with it.

Kind regards,