For those people who find that pressing one of the special keys causes
the mouse to jump to (0,0), could you please attach the log generated by
input-events when that occurs? You'd want to run “sudo input-events $N”
(replacing $N with the input device number) in a terminal, then press a
special key to trigger the behaviour, then copy the output here.
You can work out what your input device number is from your
/var/log/Xorg.0.log. For example, this person has their special keys on input
device 3 (/dev/input/event3):
vvvvvvvvvvvvvvvv
[ 86337.025] (II) config/udev: Adding input device Microsoft Microsoft® Digital
Media Keyboard 3000 (/dev/input/event3)
[ 86337.025] (**) Microsoft Microsoft® Digital Media Keyboard 3000: Applying
InputClass "evdev keyboard catchall"
[ 86337.025] (**) Microsoft Microsoft® Digital Media Keyboard 3000: always
reports core events
[ 86337.025] (**) Microsoft Microsoft® Digital Media Keyboard 3000: Device:
"/dev/input/event3"
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found 1
mouse buttons
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found
scroll wheel(s)
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found
relative axes
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found
absolute axes
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found x and
y absolute axes
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Found keys
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Configuring
as mouse
[ 86337.060] (II) Microsoft Microsoft® Digital Media Keyboard 3000: Configuring
as keyboard
[ 86337.060] (**) Microsoft Microsoft® Digital Media Keyboard 3000:
YAxisMapping: buttons 4 and 5
[ 86337.060] (**) Microsoft Microsoft® Digital Media Keyboard 3000:
EmulateWheelButton: 4,
Your special-key device will be the one with all those incorrect
properties - 1 mouse button, scroll wheels, relative & absolute axes.
--
Keyboard special keys interfere with mouse
https://bugs.launchpad.net/bugs/636311
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