Discussion:
[Wayland-bugs] [Bug 108306] Double-tap Suppressed by Debounce in VM Guest
b***@freedesktop.org
2018-10-09 16:03:20 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=108306

Bug ID: 108306
Summary: Double-tap Suppressed by Debounce in VM Guest
Product: Wayland
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: XWayland
Assignee: wayland-***@lists.freedesktop.org
Reporter: ***@kevin.kleinfelter.com
QA Contact: xorg-***@lists.x.org

Created attachment 141962
--> https://bugs.freedesktop.org/attachment.cgi?id=141962&action=edit
Mouse Event Trace

Fast double-taps get treated as a single click.

Behavior is present in libinput 1.10.4-1 but not in 1.8.2-1ubuntu2. (I haven't
tried the versions in between.) Still present in 1.12.0-1.

I think this is similar to https://bugs.freedesktop.org/show_bug.cgi?id=105974
with different hardware.

I'm trying to run Ubuntu 18.04 in a VMware Fusion guest on a Macbook host. If
I double-tap the trackpad fast, it gets treated as a single-click in Ubuntu.
If I double-tap slow (but not too slow) it gets treated as a double-click.
Hitting the narrow window is hard! This makes it tough to run X in a VM on a
Macbook.

I suspect that the host hardware+software delivers a synthesized double-click
to the guest, and that the time between the clicks is very small.

evemu-record shows two "VirtualPS/2 VMware Virtual Mouse" devices and a "VMware
VMware Virtual USB Mouse". Capture of the first of these is attached. It
looks to me like the second tap comes 8 ms after the first, and I'm betting
that is treated as bounce.
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b***@freedesktop.org
2018-10-10 03:02:07 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=108306

--- Comment #1 from Daniel van Vugt <***@canonical.com> ---
Please move this bug report to the new tracker:
https://gitlab.freedesktop.org/groups/libinput/-/issues
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b***@freedesktop.org
2018-10-11 00:18:47 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=108306

Peter Hutterer <***@who-t.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |***@who-t.net
Resolution|--- |MOVED

--- Comment #2 from Peter Hutterer <***@who-t.net> ---
moved to https://gitlab.freedesktop.org/libinput/libinput/issues/158
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