280625 - dropdowns go up the screen when mozilla is displayed in my second monitor

Status: RESOLVED WORKSFORME

(Core :: XUL, defect)

Description

[Steve Bosman]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050131
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050131

When running Mozilla on my secondary monitor any page with dropdowns displays
them going up the page instead of down, in pages with large dropdown lists this
results in some options being unselectable.
I have a two monitor system:
Primary at 1600x1280 (used for my IDE and testing my web app) and secondary at
1024x768 (used for testing my web app) using a Matrox Millenium G550.

Reproducible: Always

Steps to Reproduce:
1. Use a two monitor system
2. Navigate to page with dropdowns

Actual Results:  
dropdowns near the top of the browser window go up the page, dropdowns near the
bottom of the browser window also go up the page.

Expected Results:  
dropdowns near the top of the browser window should dropdown, dropdowns near the
bottom of the browser window should go up the page.

Comment 1

[Dave Miller [:justdave]]

not a bug in Bugzilla....

Comment 2

[Tim H]

Attachment: Cropped screenshot of problem at top of secondary screen displaying example page

I confirm this happens on my system too. When screens are offset, dropdown can
go offscreen. Some additional information follows.

Setup: 
 Windows 2000 SP4
 Matrox G400 DualHead - secondary screen located at bottom right corner of
primary screen (ASCII picture, use fixed font to view):
+-----+
| Pri |
+-----+-----+
      | Sec |
      +-----+

 Mozilla 1.7.5
Example page: http://www.dilbert.com/comics/dilbert/archive/

Comment 3

[Boris Zbarsky [:bzbarsky]]

Could you retest this in tomorrow's nightly build, now that bug 245163 is fixed?

Comment 4

[Tim H]

I didn't get the notification in time to try the Feb 17 build. I did try the
nightly build dated Feb 19 and I still get the dropdown menu extending upward
off-screen on my secondary monitor.

Tim

Comment 5

[Boris Zbarsky [:bzbarsky]]

OK.  Sounds like menus have a general issue here, then....  Neil, any idea
what's up?

Comment 6

[[e-mail]]

Is the menu code checking the wrong screen and therefore thinks it never fits?

Comment 7

[Boris Zbarsky [:bzbarsky]]

The menu code is just calling into
nsDeviceContextWin::GetDeviceSurfaceDimensions.  From that point on, I don't
really know exactly what the code is doing, but it's definitely trying to locate
the screen the window is on (see nsDeviceContextWin::ComputeFullAreaUsingScreen).

Comment 8

[Nikos Platis]

This happens with Firefox 1.0.1 on Windows XP (with an ATI 9600 Graphics card,
if this has any importance). In fact, when running Firefox on the second
monitor, all popup windows (e.g. menus, autocomplete lists) appear on the first
monitor; their y position is correct, but they are always adjacent to the right
edge of the first monitor.

Comment 9

[Nikos Platis]

Ignore the last comment, sorry, wrong bug...

Comment 10

[Steve Bosman]

I'm currently on 1.04 and the problem is still happening, but on a whim I moved
my secondary monitor this morning and now in display properties instead of
something like this
     +--------+
+----+ Pri    |
|Sec |        |
+----+--------+
I have something like this
+----+--------+
|Sec | Pri    |
+----+        |
     +--------+
and dropdowns drop down as expected.

Comment 11

[Mike Connor [:mconnor]]

monkeyed around with this with a current trunk build, seems to be WFM no matter how much I try to hurt my desktop arrangement.  As a note, 1.0.4 is based on gecko 1.7, so it wouldn't have had the fixes this apparently depended on.