[Wayland-bugs] [Bug 96969] Ignore the mute touchpad when synaptics i2c is used

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Jul 18 02:24:08 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=96969

--- Comment #1 from Russell Stuart <russell+freedesktop.org at stuart.id.au> ---
I looked did at it further, after seeing your comment on LWN about the name
"SynPS/2 Synaptics TouchPad" coming from the kernel.  You were correct - it is
what is returned by the EVIOCGNAME, ioctl.  But that didn't look like a name
that would be hardwired into the kernel.

Turns out "SynPS/2 Synaptics TouchPad" is hanging off the 8042, or whatever
passes for that in a modern south bridge.  The 8042 is the PS/2 controller for
the mouse and keyboard, and mice support Plug and Play stuff - like reading
back the name.  So my DELL XPS 9550 touchpad has interfaces to two buses - i2c
and the 8042.

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