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SubjectRe: [PATCH] Input: trackpoint - force 3 buttons if 0 button is reported
On January 21, 2018 12:10:50 PM PST, wrote:
>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:
>> I'll ask them to try my patch and if it is indeed 0x01 device I'll
>> 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
>bugzilla ticket. I can also report success on lenovo e570.
>But some seem to have problems, could it be that they are not including
>commit in the kernel they are running ? Or did a bios upgrade change
>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.

I suppose Lenovo changed the firmware, because if you take a look at bugzilla link I provided there is a box that does not fail the command but indeed responds with 0 as number of buttons. It still reports device ID 0x010e.

Hi Ulrik,


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