Grid plugin places windows incorrectly when dragged to right edge

[Ben Guzzardi]

Dragging a window to the right edge of the screen causes it to overlap the adjacent workspace by a few (between one and maybe four) pixels. This causes the unity launcher to disappear on the adjacent workspace, and clicking the app's icon in launcher to behave oddly (as the window is technically on the workspace, though not meaningfully so).

steps to reproduce:

- Pick a window on either of the left workspaces, ensure no windows are displayed on the other spaces
- Drag the window to the right edge, and snap it there (gold rectangle)
- Switch one workspace to the right

Expected behavior: Launcher is still visible, snapped window is not visible

Observed behavior: Launcher is hidden, a few pixels of the right edge of the snapped window are visible on the left edge of the workspace.

I am currently experiencing this bug in 12.04 (alpha 1, most recent updates were earlier today) in Unity 3D.

Left edge snap and top edge snap appear to work as expected.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nat Wilson (njwilson23)]

This happens to me too, and has for a couple of Ubuntu releases. Also, the overlapping window stays focused. Today I switched to the workspace to the right, pressed Alt-F4, and accidentally killed a long running MATLAB process in the original (left) workspace.

Running an up-to-date 12.04

[Sami Jaktholm (sjakthol)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 898870, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.