I didn’t post in support because I have much to do next time this happens. At this point, I’m really curious if anyone else sees this?
I’m pretty sure Software Updater, when trying to inform of an update from the background process, doesn’t make its window properly for compiz or something. Not only doesn’t it make a visible window but it places the whole desktop in a strange mode of focus and keyboard navigation corruption.
It’s like there’s a window stealing focus in another universe and not on my desktop. Of course, I suspect this window is Software Updater in some sort of limbo.
“Software Updater” appears in the Window List. I click on it.
I expect A Software Updater window to open and tell me updates.
Instead, the entry disappears but nothing visibly opens.
At this point, I’m in this strange mode.
Logout/Login clears it.
Without going into long detail, closing windows gets a phantom focus where even Alt+Tab no longer works. Clicking anywhere on a window or desktop sets focus and all is well… until I close the next window and it happens again.
System is 16.04 x64 with Mate 1.14.1 update running compiz. Next time I’m going to switch to Marco to see if Software Updater makes an appearance.