cinnamon expo overview broken on multi-monitor setup

[leigh123linux]

Forwarded from https://bugzilla.redhat.com/show_bug.cgi?id=843147

Description of problem:
Cinnamon's Expo to show workspaces is broken when using multiple monitors. When I hit the hot-corner or hit CTRL-ALT-UP to show the workspaces, I only get a inch-wide strip on the far right showing the + button and a tiny bit of the right-most workspace. See the attached cinnamon-expo-workspaces-multi-monitor.png screenshot.

If I disable one monitor (leaving only one active monitor), then the Expo mode works fine and I can see all the workspaces. See the cinnamon-expo-workspaces-single-monitor.png screenshot.

Note: the screenshots include the terminal window, but this window is not normally visible in the Expo overview. I'm not sure why 'import' is grabbing this window too.

Version-Release number of selected component (if applicable):
cinnamon-1.4.1-0.8.git7959517.fc17.x86_64

How reproducible:
every time

Steps to Reproduce:

1. run cinnamon (2d or 3d) on a system with two or more monitors
2. hit CTRL-ALT-UP or move the mouse to the hot corner

Actual results:
expo overview is only shown on a tiny vertical strip on the far right

Expected results:
expo overview uses full screen and shows all my workspaces

[leigh123linux]

Forwarded from https://bugzilla.redhat.com/show_bug.cgi?id=843147

I have a Lenovo T510 with onboard Intel graphics for the Core i7. The laptop is currently in the docking station with a Samsung SyncMaster 220WM monitor attached via DVI.

Xorg.0.log is attached

https://bugzilla.redhat.com/attachment.cgi?id=600378

$ xrandr --current
Screen 0: minimum 320 x 200, current 3280 x 1050, maximum 8192 x 8192
LVDS1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
1600x900 60.0_+ 50.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 connected 1680x1050+1600+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.0_+
1280x1024 75.0 60.0
1280x960 60.0
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

[MatejSpindler]

I can confirm this bug.

This only happens if secondary monitor is on the left side of the primary screen. See bottom pictures of my desktop in expo mode. First is with secondary monitor on right side of primary and next picture is secondary monitor on left side of primary.

https://dl.dropbox.com/u/235142/Secondary%20on%20Right.png
https://dl.dropbox.com/u/235142/Secondary%20on%20Left.png

[leigh123linux]

Fix Confirmed

https://bugzilla.redhat.com/show_bug.cgi?id=843147