Re: x11 and the mouse

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On 4/21/19 8:41 PM, Cameron Simpson wrote:
On 21Apr2019 18:50, ToddAndMargo <ToddAndMargo@xxxxxxxx> wrote:
More interesting.  Xfce's mouse dialog show acceleration is on:
screenshot:
https://bugzilla.xfce.org/attachment.cgi?id=8432

Just wondering whether this dialogue is a direct query of the mouse state or some kind of proxy via Xfce's settings i.e. if you change the seting outside Xfce does the dialogue notice? (Either immediately or on dialogue close/reopen?)

This may be the issue.  The screen shot shows an acceleration of 2.5
and xinput says it is zero.  Xfce may be misreading xinput

Can xinput acceleration be <0? To "descale" the mouse? What if Xfce is showing an arbitrary scale with xinput's "0" being the middle of the scale. Your screenshot has the scale suspiciously bang in the middle.

What's "xset q" report?

Cheers,
Cameron Simpson <cs@xxxxxxxxxx>


Fresh reboot:

$ xset q
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000002
  XKB indicators:
    00: Caps Lock:   off    01: Num Lock:    on     02: Scroll Lock: off
    03: Compose:     off    04: Kana:        off    05: Sleep:       off
    06: Suspend:     off    07: Mute:        off    08: Misc:        off
    09: Mail:        off    10: Charging:    off    11: Shift Lock:  off
    12: Group 2:     off    13: Mouse Keys:  off
  auto repeat delay:  500    repeat rate:  30
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:  50    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  0    cycle:  0
Colors:
  default colormap:  0x20    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  catalogue:/etc/X11/fontpath.d,built-ins
DPMS (Energy Star):
  Standby: 7200    Suspend: 7200    Off: 14400
  DPMS is Disabled

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

After setting it to .75

$ MouseAccel.pl6 .75
AccelSpeed         = <.75>
MouseID            = <15>
AccelID            = <296>
PreviousAccelSpeed = <0.000000>
xinput --set-prop 15 296 .75
Logitech USB Optical Mouse acceleration speed set to .75

$ xset q | grep accel
  acceleration:  2/1    threshold:  4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Setting it back to zero:

$ MouseAccel.pl6 0
AccelSpeed         = <0>
MouseID            = <15>
AccelID            = <296>
PreviousAccelSpeed = <0.001000>
xinput --set-prop 15 296 0
Logitech USB Optical Mouse acceleration speed set to 0

$ xset q | grep accel
  acceleration:  2/1    threshold:  4

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