679625 - Infinite wait cursor when activating a window

Status: UNCONFIRMED

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Yves Goergen [:ygoe]]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0
Build ID: 20110811165603

Steps to reproduce:

I switched to a Firefox window with Alt+Tab, leaving the mouse cursor inside the Firefox window. I did not move the mouse cursor then.


Actual results:

The mouse cursor shows the wait cursor (on Win7: the rotating bluish ring). Only when I move the mouse cursor by at least 1 pixel, the normal cursor is restored.


Expected results:

A normal arrow cursor should be displayed (or whatever is normal for the page coordinates under the current mouse cursor location).

Comment 1

[Yves Goergen [:ygoe]]

It doesn't even change when scrolling the page with the arrow keys or the mouse wheel (which is effectively considered a key on Windows).

Usually, when putting the mouse cursor over a link and scrolling the page, the hand cursor, the link hover style and the target URL bar are updated accordingly. But while the wait cursor is displayed, none of that happens when scrolling - again, until the cursor is moved, then everything works normally again.

It seems like the mouse cursor is dead and frozen somewhere between both windows and only wakes up again when it is moved. Something from the MouseMove handler should probably also be done on window activation.

Comment 2

[Mihaela Velimiroviciu (:mihaelav)]

Reporter, are you able to reproduce the issue if you restart Firefox in Safe mode? How about a new clean profile?
http://support.mozilla.com/kb/Safe+Mode http://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile

Thank you!

Comment 3

[Yves Goergen [:ygoe]]

The issue is not easily reproducible. I have seen it right now, it always displayed the wait cursor when switching to the Firefox window. I then restarted Firefox the usual way but it's gone now. I cannot get the error back. And I certainly won't use a bare Firefox all work day long.

Comment 4

[Wayne Mery (:wsmwk)]

Yves, do you see this issue?

Comment 5

[Yves Goergen [:ygoe]]

Occasionally. You guys made me get so used to it I don't even notice it anymore. Well done.