Bug#1012655: Macbook Pro touchpad not working with kernel 5.18

Stephan Verbücheln

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Jun 11, 2022, 3:00:02 AM6/11/22

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Package: src:linux
Version: 5.18.2-1

The touchpad on my 2014 Macbook (MacBookPro11,1) is no longer working
since kernel 5.18 was installed. This affects both X11 and Wayland. I
am using Sid with Gnome.

When booting back into kernel 5.17, the touchpad works without
problems. That's why I suspect the bug to be in the kernel.

Keyboard is working without problems. keyboard and trackpad appear to
be one single device.

External USB mouse is working without problems.

# lsusb
Bus 001 Device 003: ID 05ac:0259 Apple, Inc. Internal Keyboard/Trackpad

# lshw
description: Keyboard
product: bcm5974
vendor: Apple Inc.

Regards

Stephan Verbücheln

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Jun 11, 2022, 3:40:03 AM6/11/22

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When I filed the bug, I could not find any other reports. Now I found
an upstream report which has matching symptoms.

https://bugzilla.kernel.org/show_bug.cgi?id=215890

However, there is confusion about the resolution. One reply states that
it was resolved in 5.18.0, but other replies talk about accidental
fixes.

A fix was submitted more recently than 5.18.0 release:
https://lore.kernel.org/all/20220606113636.588...@linux.intel.com/

Regards

Diederik de Haas

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Jun 11, 2022, 6:10:03 AM6/11/22

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Control: tag -1 fixed-upstream

On Saturday, 11 June 2022 09:33:09 CEST Stephan Verbücheln wrote:
> I found an upstream report which has matching symptoms.
>
> https://bugzilla.kernel.org/show_bug.cgi?id=215890
>
> However, there is confusion about the resolution. One reply states that
> it was resolved in 5.18.0, but other replies talk about accidental fixes.
>
> A fix was submitted more recently than 5.18.0 release:
> https://lore.kernel.org/all/20220606113636.588...@linux.inte
> l.com/

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c42e65664390be7c1ef3838cd84956d3a2739d60
is where it is fixed. But there is indeed some confusion as noted by Linus:
https://lore.kernel.org/all/CAHk-=wjcC15LsPS1Nj-e5nC-hR3...@mail.gmail.com/

I normally use https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
and if you search for the primary commit message, it doesn't find it.
If you add "commit/?id=c42e65664390be7c1ef3838cd84956d3a2739d60" to that base
URL, you'll see "Notice: this object is not reachable from any branch."

So it is fixed upstream and according to Linus it is also part of 5.19-rc1
Apparently it's considered an important fix, so I guess it should be backported
to 5.18 'shortly'.

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Stephan Verbücheln

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Jun 12, 2022, 2:20:03 AM6/12/22

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They merged it (on June 7) into kernel 5.19, but kernel 5.18.3
(released June 9) does not seem to have it yet.

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/?id=v5.18.3&id2=v5.18&dt=2

I will just use 5.17 or external mouse until the fix lands in Sid.

Thank you and regards

Stephan Verbücheln

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Jun 15, 2022, 11:50:03 AM6/15/22

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Kernel 5.18.4 got the patch.

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/drivers/input/mouse/bcm5974.c?id=v5.18.4&id2=v5.18.3

Regards

Diederik de Haas

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Jun 15, 2022, 2:10:04 PM6/15/22

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Excellent, thanks for mentioning that :-)

> I will just use 5.17 or external mouse until the fix lands in Sid.

My guess is that the next upload to Sid should have it then.

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Salvatore Bonaccorso

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Jun 15, 2022, 4:00:03 PM6/15/22

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Hi,

This assumption is correct :)

Regards,
Salvatore