Window list missing items on second monitor

I've just found it's also possible for the "Window Selector" to give the wrong list of items.

If I select a program on the second monitor, then click on the Window Selector, it shows the contents of both screens. If however I then right-click on the Window Selector, then left-click on it again, it now shows only the contents of the first monitor (where the window selector panel is located).

So far alt-tab has proven reliable, but it's very disconcerting to be not quite sure of what programs are running.

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:

 * Is this reproducible?
 * If so, what specific steps should we take to recreate this bug?

 This will help us to find and resolve the problem.

Could you also run wnckprop on one dialog which is not listed and copy that to the bug and take a screenshot showing the issue?

It's reproducible every time for me right now, simply moving windows to the second screen makes them disappear from the window list.

I've got detailed notes on how I configured Ubuntu if they are needed. The basic setup is that I'm running on an ATI Radeon x1950, I installed the Ubuntu ATI drivers, then the latest ATI drivers, and configured it for dual screen using the following aticonfig commands:

aticonfig --dtop=horizontal
aticonfig --initial --desktop-setup=horizontal --overlay-on=1 --ovt=Xv

If you have any problems reproducing this let me know, I plan to re-install Ubuntu anyway soon to check that my notes are accurate, so it's no problem to test that it's 100% reproducible.

Wnckprop results from a console window on the second monitor are:

Name: Bottom Expanded Edge Panel
Icon Name: Bottom Expanded Edge Panel
Icons: set
On Workspace: 0 ('Desk 1')
On Screen: 0 (Window Manager: compiz)
Window Type: dock or panel
Geometry (x, y, width, height): 0, 1000, 1280, 24
Class Group: Gnome-panel
XID: 16777219
PID: 5958
Session ID: <unset>
State: sticky, skip pager, skip tasklist
Possible Actions: make above, unmake above, make below, unmake below

I've attached a screenshot of my entire desktop, showing the windows on each monitor, and clearly showing the difference between the window list and the window selector.

Ross

> From: <email address hidden>
> To: <email address hidden>
> Date: Mon, 25 Aug 2008 08:43:17 +0000
> Subject: [Bug 260939] Re: Window list missing items on second monitor
>
> Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:
>
> * Is this reproducible?
> * If so, what specific steps should we take to recreate this bug?
>
> This will help us to find and resolve the problem.
>
> Could you also run wnckprop on one dialog which is not listed and copy
> that to the bug and take a screenshot showing the issue?
>
> ** Changed in: libwnck (Ubuntu)
> Sourcepackagename: gnome-panel => libwnck
> Importance: Undecided => Low
> Assignee: (unassigned) => Ubuntu Desktop Bugs (desktop-bugs)
> Status: New => Incomplete
>
> --
> Window list missing items on second monitor
> https://bugs.launchpad.net/bugs/260939
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “libwnck” source package in Ubuntu: Incomplete
>
> Bug description:
> Windows on my second monitor don't appear in the 'Window List', although if I add the 'Window Selector' I can find them, and Alt-Tab works ok too. This is a real nuisance, especially if I have a window minimised as they seem to disappear. I can't find any setting to correct this, nor anything on any forum indicating this has been seen before.
>
> I'm running Ubuntu 8.04, with ATI graphics drivers powering two monitors, and Compiz enabled. I think the graphics drivers are set to use 'overlay' mode on the second screen, but I'm not entirely sure what that's needed for.
>
> It also looks like dragging windows from the second monitor to the first causes odd effects. I have evolution mail running all the time so it's the first program on my window list. If I drag a program ...

the screenshot shows you don't have a tasklist on the second screen, does it work correctly if you add one there?

Aaah, didn't know I could do that (spot the recent windows convert).

Ok, if I add a new panel on the 2nd screen, and put a window list on there it shows the programs I have on that monitor. That does appear to be a usable workaround so I'll keep testing that and let you know if I spot any problems.

Long term though I'd still rather have a single window list that shows all the programs I have open. There's an option to include all workspaces, I'd very much like an option to include all monitors too.

changing to unconfirmed but the bug is a known one and likely a duplicate

Got another comment to add to this after spotting something today. If I swap to a different workspace, all of my windows then appear on the window list on the primary monitor (and disappear from the new list on the second monitor).

So items on the second monitor only disappear from the window list if I'm currently viewing the workspace they're on...

I should maybe mention that I don't get this behavior on my work computer which I've just upgraded to Ubuntu, so I think it's safe to close this bug.

My work computer is also running Ubuntu 8.04, this time on an ATI Radeon HD 2600XT. The setup is essentially identical as I followed the same configuration notes, but one key difference may be that I didn't need to mess about with graphics drivers so much this time.

My installation steps were simply based on:

# Click System -> Administration -> Hardware drivers and install the non free ati drivers
# Then configure with:
    * aticonfig --dtop=horizontal
    * aticonfig --initial --desktop-setup=horizontal --overlay-on=1 --ovt=Xv

Confirmed, but it was working until yesterday.

Ubuntu 8.10 here

Thanks for the report, it has been some time without any response or feedback in this bug report and we are wondering if this is still an issue for you with the latest release of Ubuntu the Natty Narwhal, May you please test with that version and comment back if you're still having or not the issue? Please have a look at http://www.ubuntu.com/download to know how to install that version.Thanks in advance.