Public bug reported:
Description:
When the X Server starts up and the login screen is shown, the initial
sensitivity of my USB mouse (acceleration and/or threshold) is very high
(the mouse pointer moves a long way with small movements of the mouse).
After I log in, the mouse sensitivity usually, but not always, gets
automatically adjusted to my preferred setting. One problem I'm having
is: this adjustment sometimes doesn't seem to happen. I often have to
run the Mouse configuration applet, move one of the sliders and move it
back, to correct the problem. The second problem (which seems closely
related, and perhaps causes the first problem) is: if I unplug the USB
mouse and plug it back in, the sensitivity goes back to being very high
again, as it was on the Login screen. This second problem reproduces
reliably.
Steps to reproduce (second problem):
On the login screen, mentally note the mouse's sensitivity (roughly).
Log on, then run the Mouse applet and set the sensitivity to be very different
from what it was on the logon screen (that is, slide the "Acceleration" slider
all the way to the left or right, whichever is most noticeably different from
the Logon screen behaviour).
Unplug, then reconnect the USB mouse. Move the mouse around to get a feel for
the sensitivity.
Observed behaviour:
The mouse sensitivity reverts back to what it was on the Logon screen.
Expected behaviour:
The mouse sensitivity should be set according to the Acceleration slider
position, and should feel the same as just before the mouse was
unplugged.
Notes:
The "xset q" mouse acceleration/threshold values do not change whilst I
unplug and replug the mouse. For example, if I move the sliders all the
way to the left, my mouse is very slow (as I'd expect) and the "xset q"
values are "acceleration: 3/10 threshold: 1". When I unplug and
reconnect the mouse, the observed sensitivity changes to being very
high, but the "xset q" output remains the same. If I then enter "xset m
3/10 1" (the exact same numbers as in the current "xset q" output), the
mouse becomes very slow again.
System affected:
I'm using Ubuntu Intrepid (64 bit version), updated only a few days ago.
xserver-xorg-core is version 2:1.5.0-1ubuntu1. Machine is Dell Inspiron
1720 laptop, with nVidia graphics and proprietary "nvidia" driver in
use. I will try re-testing with "nv" driver. USB mouse is Logitech
wireless, "lsusb" output shows it as "046d:c50e Logitech, Inc. MX-1000
Cordless Mouse Receiver".
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
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USB mouse acceleration reset when plugged in
https://bugs.launchpad.net/bugs/273837
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