Public bug reported:
This has got to be the strangest bug I have ever filed here. There is
no debugging data, by the way—I am running Feisty, fully updated.
I have dual-display mode with an i810. No Xinerama, so these are two
different X11 screens. Or at least, they're supposed to be. According
to $DISPLAY, they are, but this behavior is rather strange and seems to
defy typical and historic dual-head, multiple screen behavior. No
desktop effects or anything fancy—just GNOME and my applications. Of
course, I actively use both heads to work on. Sometimes, when I move
from the secondary display to the primary display, say, into a terminal
window, and run an application and then exit the application, the mouse
cursor will move all the way to the top left, taking focus with it.
I have checked the usual hardware problems that would force a jump of
the mouse; the mouse itself is clean, the surface is clean, and a
replacement does the same. It is *not* hardware, and the “mouse-jump”
occurs the moment I exit emacs.
This problem is reproducible 100% of the time so far for me. For
example, I have Epiphany running on screen two right now—that is where I
am entering this bug in. I move the mouse to the primary screen, and my
gnome-terminal (the only application running over there right now) gains
focus. I type execute emacs, and then quit (C-x C-c) with the keyboard.
*The GNOME Terminal never regains focus.* Instead, Epiphany (on the
second screen) has the focus. At this point, the mouse is still on my
primary screen. However, the moment that I press Alt-Tab, the mouse
“jumps” to the secondary display, top left corner (0x0), where the focus
is with Epiphany. Now, I have found that I can restore focus to the
primary screen—and retain the mouse there—by pressing Alt-F1 (pulling up
the Applications menu on the secondary display, which should not have
focus) and pressing <ESC>, without pressing Alt-Tab. After I press
Alt-F1,ESC, I can Alt-Tab normally on my primary display, and the mouse
does not run away on me, and returns focus back to my GNOME Terminal.
This has got to be the most minor—and yet most annoying—bug that I have
reported. I thought I was going crazy at first. I am not, but I think
I would probably think I were if I didn’t see it for myself.
The only way I can think of to show what is actually happening would be
to use a camcorder, but I don’t have one. In any case, it's strange—and
not hardware, so it’s outside of my ability to fix it.
ProblemType: Bug
Architecture: i386
Date: Tue Mar 27 01:54:02 2007
DistroRelease: Ubuntu 7.04
Uname: Linux pepper.trausch.us 2.6.20-13-generic #2 SMP Sun Mar 25 00:21:25 UTC
2007 i686 GNU/Linux
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
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Mouse “jumps” from one screen to the other
https://launchpad.net/bugs/96843
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