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Public bug reported:
Binary package hint: xserver-xorg-input-synaptics
The cursor motion on a trackpad is derived from the distance of the
current touch location from the previous touch location. When the number
of touches on the trackpad changes, the touch location may jump causing
a cursor jump. This has been remedied by the following commit:
http://cgit.freedesktop.org/xorg/driver/xf86-input-
synaptics/commit/?id=a6ca4d2523904b7ce49edc29ba408979bdf0d45e
However, the multitouch patches added to synaptics cause the change in
the number of fingers to be reported one frame after the actual change.
This allows a cursor jump to occur.
** Affects: xserver-xorg-input-synaptics (Ubuntu)
Importance: Medium
Assignee: Chase Douglas (chasedouglas)
Status: In Progress
** Changed in: xserver-xorg-input-synaptics (Ubuntu)
Status: New => In Progress
** Changed in: xserver-xorg-input-synaptics (Ubuntu)
Importance: Undecided => Medium
** Changed in: xserver-xorg-input-synaptics (Ubuntu)
Assignee: (unassigned) => Chase Douglas (chasedouglas)
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https://bugs.launchpad.net/bugs/751525
Title:
Jumpy cursor on semi-mt trackpads
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