doc/user: add a faq entry about the pointer acceleration "issue"

Despite many bits wasted on reddit, phoronix, lwn etc. no-one seems interested
in actually fixing this for their device, so let's at least add a FAQ entry.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/doc/user/faqs.rst b/doc/user/faqs.rst
index 4de7a3fc44a3ecafac1633e555f8402bde3ae024..7cd6113db76d372944a691a38231e3c4feb16162 100644 (file)
--- a/doc/user/faqs.rst
+++ b/doc/user/faqs.rst
@@ -42,6 +42,18 @@ This is a symptom of an invalid trackpoint multiplier. These devices need
 pointer acceleration accordingly. See :ref:`trackpoint_range` for a detailed
 explanation.
 
+.. _faq_pointer_acceleration:
+
+------------------------------------------------------------------------------
+Why is libinput's pointer acceleration worse than synaptics/evdev
+------------------------------------------------------------------------------
+
+This is a known problem affecting some devices and/or use-case but the exact
+cause is still unknown. It may be a device-specific issue, it may be a bug
+in libinput's acceleration code, it may be a disagreement about how pointer
+acceleration should feel. Unfortunately this is something that affected
+users need to investigate and analyze.
+
 .. _faq_enable_tapping:
 
 ------------------------------------------------------------------------------