I would like to confirm the bug, and provide additional data.
My definition of "slow": when I move my finger at 1 mm/s the cursor does
not move *at all*. Same when I roll the tip of my finger to drive the
cursor where I need it to be (that's what I usually do when I need
single-pixel precision).
I can watch the events generated by the kernel with synclient, but all of them
are ignored by X up to a certain motion speed, beyond which the cursor starts
moving, but in jerky sort of way.
For me, this started happening very recently (about 2 days ago), but I was
mostly reading during that time and didn't notice a definite event that I could
link to the change. If this is indeed caused by xserver-xorg-input-synaptics, I
would like to know which was the last working version. I did a lot of precise
work in Gimp just last weekend, and did not notice any inconvenience. In
between, I have upgraded my nvidia-glx-180 to 185, and that is the only upgrade
I am aware of, although I can't see how it would be related to the touchpad
problem. Now I am unable to use the touchpad for anything except selecting
windows: I can't cut and paste and I can't even reliably put the cursor on the
right line in a text editor. At the same time, external mice, pen tablet and
the built-in track stick work smoothly.
xserver-xorg-input-synaptics:
Installed: 0.99.3-2ubuntu5
Candidate: 0.99.3-2ubuntu5
Version table:
*** 0.99.3-2ubuntu5 0
500 http://ppa.launchpad.net jaunty/main Packages
100 /var/lib/dpkg/status
0.99.3-2ubuntu4 0
500 http://archive.ubuntu.com jaunty/main Packages
"AlpsPS/2 ALPS GlidePoint" id=2 [XExtensionPointer]
Num_buttons is 12
Num_axes is 2
Mode is Relative
Motion_buffer is 256
Axis 0 :
Min_value is 0
Max_value is 1023
Resolution is 1
Axis 1 :
Min_value is 0
Max_value is 767
Resolution is 1
It's on Dell m4300 running Jaunty.
--Gene
--
touchpad mouse stutters/stops on slow movement
https://bugs.launchpad.net/bugs/379517
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