From Bugzilla Helper: User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.0.0+) Gecko/20020428 BuildID: 2002042808 With a second, external display connected to my PowerBook G4 to the left of my display, popup (right-click) menus appear on the primary (LCD) display, not under the cursor. Reproducible: Always Steps to Reproduce: 1. Get a PowerBook G4 (heh). 2. Plug in an external monitor, non-mirrored, to the left of the default screen 3. Right-click on a browser window on the external display Actual Results: The popup menu shows up at the correct height, but on the LCD, not the external display. Expected Results: The popup menu should appear directly under the cursor. Bug 135746 is also about dual-head on the Mac, but that's a crash, and I don't think it's directly related. This appears to be happening for form widgets, as well: my external display is higher than my LCD, and form popups extend below the bottom of the display they're on, but would display correctly if on the LCD. (Does that make sense?)

Ok, I narrowed it down some. If you plug in an external display, get Mac OS X to detect it, and then start Mozilla, it works great. You only see this bug when you start Mozilla, plug in the external display, and have OS X detect that display while Mozilla is running. Since there's a simple workaround (restart Mozilla after you plug in your display), I think "minor" describes it pretty well.

Same thing under MacOS 8.6 but I can't pin down the exact steps/circumstance to reproduce...

*** Bug 159584 has been marked as a duplicate of this bug. ***

This also occurs when you start your laptop with only the external display enabled, and then enable the LCD (by opening the laptop and clicking on 'detect displays'). As you say, the w/a is to (re)start mozilla after the displays are configured. I think the subject is somewhat misleading (and, therefore, not particularly easy to search for). I beleive the term 'head' refers to a complete graphics pipeline, and since this only has one pipeline, it isn't dual-head. IINM, dual-channel is a more appropriate term. I also don't think it matters which side of the LCD you have your external monitor configured - the subject specifies that the LCD is to the right of the external monitor. Small points, but it might make it easier to search for and, therefore, reduce the number of duplicates (not that there's like to be many). (BTW, this problem doesn't occur on dual channel SGI machines). Thanks. Max.

Adding qawanted to match DUPEME on whiteboard.

resembles bug 61000

This is showing how Mozilla 1.3a displays the URL completion menu on the wrong display on OS X (Powerbook G4, OS X 10.2.3). Mozilla was started on the primary built-in LCD panel. Later, an external monitor was connected and upon wake-up, the Powerbook automatically extended the desktop to both monitors and moved the menu-bar to the external display, as it became the primary. But all drop-down menus *within Mozilla* (not the system menu bar) are still displayed on the built-in LCD. (color-reduced image due to size limitation)

*** This bug has been marked as a duplicate of 158914 ***