Something a tad weird happened. While preparing to test upstream
kernels, I started by removing any proprietary AMD driver with:
sudo apt-get remove --purge fglrx*
(this Dell E6540 laptop comes with a dual video card: built-in Intel
and "discrete" AMD Radeon)
After that I did not experience the issue for several hours, so I
thought that it could have been triggered by the AMD driver.
However, I did make one test: clean reboot, suspend by closing the lib, then
resume by opening the lid.
After that I started experiencing the same issue again.
At least I am able to refine a bit how to reproduce:
- close the lid to suspend, open to resume
- whichever window was at the front at time of the suspend now "owns" the
stick/touchapd events, even if it was not "owning" them before suspend
- Ctrl+Alt+F1 then Ctrl+Alt+F7 restores normal behaviour
Let me try to test these newer kernels now.
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https://bugs.launchpad.net/bugs/1480615
Title:
[Dell Latitude E6540] ALPS touchpad and buttons work only in a single
window.
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