Bug#1071236: general: keyboard, mouse, and trackpad behave inconsistently; seemingly phantom input device events occur unpredictably
Package: general
Severity: important
X-Debbugs-Cc: casaise@acm.org
Dear Maintainer,
After uprading my laptop (Lenovo L570) from Debian 11 to Debian 12, the system
appears to
handle input devices (keyboard, trackpad, mouse) inconsistently. Initially,
everything works
fine, but progressively symptoms such as those listed below occur with
increasing frequency,
till the system is nearly unusable:
1) When typing text, the cursor suddenly relocates to another position,
typically several lines
upwards.
2) The mouse buttons have no effect (e.g. to close a window, or to activate a
menu entry in an
application or the taskbar, or to move to a different workspace). It is then
necessary to use the
buttons on the trackpad -- then the mouse functions again.
3) When resizing a window with the mouse, the handles have either no effect at
all, or cannot
be released to stop resizing. Again, clicking on the trackpad "resets" the
mouse.
4) Contextual menus suddenly pop up without having been invoked. Again,
clicking somewhere is
required to make them disappear.
5) When using a terminal window, the keyboard suddenly stops working. I have
found no other solution
than killing the window and reopening another one.
6) On a variety of applications (terminal window, browser, editor), the system
sets itself in a state
as if the user wanted to make a copy of a text region. Moving the mouse of
trackpad selects a portion
of the text on the screen.
7) Buttons on mouse and trackpad stop operating; shutting down the computer can
only be achieved with
a forced shutdown (long press on on the on/off hardware button).
The problem takes place with Gnome, classic or not, on X.org or not, and on
XFCE.
I had upgraded three other old machines (3 models from 2 other manufacturers)
to Debian 12 -- none
exhibited that problem so far.
I would appreciate any kind of information about how to put things in order.
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