Public bug reported:
Binary package hint: metacity
(Beware: The bug appears on a different kernel than the one reported by
ubuntu-bug. Details below.)
After I upgraded from Karmic to Lucid, then after every boot, mouse
clicking and Alt-Tab work fine in the beginning, but very soon, only the
item that has keyboard focus responds to the mouse. The rest of the
computer becomes almost a brick, but not entirely.
It seems the mouse buttons and Alt-Tab work fine until I click on one of
the thin strips at the top and the bottom of the screen, or click inside
a window. After that point, only the item that has keyboard focus
responds. More details below.
I suppose this is a severe bug, since non-technical users won't know how
to get around the problem, and won't be able to use their Ubuntu to look
for a solution. For them, the upgrade produces a brick.
WORKAROUND:
The problem appears when I boot with the kernel that sits at the top of the
boot list after the upgrade, kernel 2.6.32-21-generic. I have not seen any
similar problems when booting with the preceding kernel, 2.6.31-21-generic.
(During this latter boot some errors are reported, but the system seems to work
fine so far.)
My system as reported by ubuntu-bug is the exact machine and partition
that has the bug, but using the above workaround.
I have only made a few limited tests, since I have no idea what tests
will be helpful, and every test requires a time-consuming reboot. Here's
a detailed list of the symptoms I've seen:
After boot, clicking on window titlebars works right, windows can be
raised and dragged. If I then click an icon in the thin strip at the top
of the screen, the application starts fine, but after this point, mouse
clicking works only on the icons in the thin bar at the top. Nothing
else anywhere on the screen responds to the mouse.
After boot, if I open the Applications menu with Alt-F1, and start
applications with arrow and return keys, I can do this several times to
open several applications. After this, I can use the mouse several times
on the titlebars of different windows to drag, focus and raise the
windows. Alt-Tab works right too. But if I then click inside a Firefox
window, so that the webpage gets focus, I can no longer use the mouse to
raise and drag windows. Then the thin strips at screen top and bottom
don't respond to the mouse either. Alt-Tab stops working too. At this
point I tested Alt-F1, and saw the "Applications" word get highlighted,
but I could not see any menu below. Either the menu didn't appear at
all, or else it may have appeared hidden behind the window that had
focus, because that window happened to cover the space where the menu
should appear.
After boot, if I click one of the running-application buttons in the
thin bar at the bottom of the screen, then after this point only those
buttons respond to the mouse buttons. Clicking windows or the strip at
the top of the screen has no effect. Clicking the buttons in the bottom
strip minimizes and unminimizes windows as it should, at least when
clicking the same button several times. I don't remember if I tested on
several buttons to see if other buttons worked right.
In all cases, at the end of the test I could reboot using Ctrl-Alt-Del
followed by arrow keys and return key.
Please tell me if you'd like me to test something in more detail or
submit log files etc. My knowledge of these things is limited, so I
don't know what may be useful to you.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: metacity 1:2.30.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.31-21.59-generic
Uname: Linux 2.6.31-21-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed May 5 03:30:56 2010
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: metacity
** Affects: metacity (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
--
Window management stops working after upgrade to Lucid
https://bugs.launchpad.net/bugs/575563
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