Steps to reporduce:
turn the flashlight in settings on
turn on WM effects (compositing)
take a shot: mouse unable to click on window buttons and to move windows
version xfwm 4.12.0git.badd196
cheese version 3.10.2
Video - Nvidia 331. ForceCompositingPipeline = on
Cannot reproduce, works fine here.
Looks like a bug in cheese that keeps an active grab on the pointer, not xfwm4 fault.
What makes you think it's a bug in xfwm4?
Please connect remotely to the host (ssh) and attach gdb to the xfwm4 process and capture a few backtrace while the problem occurs.
Ideally, capture a few backtraces taken every few seconds.
SSH: "gdb xwfm4 export DISPLAY=:0" says "No stack" after entering bt. Maybe I do something wrong.
Tested on another user, with xfwm from trusty ppa - the bug exists. Maybe it is cheese's bug.
(In reply to yanpaso from comment #3)
> SSH: "gdb xwfm4 export DISPLAY=:0" says "No stack" after entering bt. Maybe
> I do something wrong.
You don't need to run xfwm4, you need to attach to the running process.
gdb -p $(pidof xfwm4)
> Tested on another user, with xfwm from trusty ppa - the bug exists. Maybe it
> is cheese's bug.
Could be pretty much anything, that's why it must be investigated.
Created attachment 6192
This is what gdb printed after taking screenshot with flashlight
Cannot reproduce on updated linux OS
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