Re: Mouse issue

["pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de>]

On Wed, Jan 15, 2020 at 04:32:30PM +0000, wisdomlight--- via wrote:
> Guix on my MacBook Air 13”
> 
> most times of booting the system the mouse goes only up and down.
> It is stuck on the right side of the screen and just goes up and down.

Ohh I thought I was the only one with that issue.  Are you using a
Macbook too?  I investigated long ago and had patched Guix to enable
debugging for udev.  Maybe it was this patch?

diff --git a/gnu/services/base.scm b/gnu/services/base.scm
index b1eff89ecc..11509aaff3 100644
--- a/gnu/services/base.scm
+++ b/gnu/services/base.scm
@@ -2054,7 +2054,7 @@ item of @var{packages}."
                     (make-static-device-nodes directory))
                   (umask old-umask))
 
-                (let ((pid (fork+exec-command (list udevd))))
+                (let ((pid (fork+exec-command (list udevd "--debug") #:log-file "/var/log/udevd")))
                   ;; Wait until udevd is up and running.  This appears to
                   ;; be needed so that the events triggered below are
                   ;; actually handled.

But why did I set the log-file?  I don’t remember.

Whatever.  Back then I found that only on bad boots the trackpad is
detected as a Mouse and therefore is not treated as a trackpad.

root@florianmacbook /var/log/gdm# cat greeter.log.2 | grep Apple | grep tagged
(II) event4  - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Keyboard
(II) event4  - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Keyboard
(II) event14 - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Mouse
(II) event14 - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Mouse
(II) event15 - Apple Computer, Inc. IR Receiver: is tagged by udev as: Keyboard
(II) event15 - Apple Computer, Inc. IR Receiver: is tagged by udev as: Keyboard
root@florianmacbook /var/log/gdm# cat greeter.log.1 | grep Apple | grep tagged
(II) event4  - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Keyboard
(II) event4  - Apple Inc. Apple Internal Keyboard / Trackpad: is tagged by udev as: Keyboard
(II) event12 - Apple Computer, Inc. IR Receiver: is tagged by udev as: Keyboard
(II) event12 - Apple Computer, Inc. IR Receiver: is tagged by udev as: Keyboard

I had not investigated further what is responsible for this trackpad
detection.  I suppose there is some difference between the udev setup
used by Guix and the udev setup used by others.

Regards,
Florian