window title stuck where gnome panel was if moved while using dual head with xrandr

[Xvani]

While using dual head and xrandr (intel 945GMA).
If you want to move the gnome panel, (say to the other screen) Ubuntu does not render the top part of the screen (where gnome panel was) correctly.

Any graphics going into that area gets stuck.

How to reproduce:

- start xrandr (i'm using: xrandr --output VGA --auto --above LVDS --mode 1680x1050 )
- grab the gnome panel and move it to the other screen/the side of its current screen.
- (f.e) maximize a window.
- minimize that same window

now notice how the window title is stuck at the top of the screen.

[Xvani (fredrile+launchpad)]

btw: I have compiz normal enabled. 0.6.0 (latest version)

[Bryce Harrington (bryce)]

This seems to work okay for me with xrandr (and compiz turned off). Can you confirm that with compiz off, it works properly?

[Motin (motin)]

I can confirm this bug with compiz turned on. It seems that Compiz reserves a panel-height space in the top of the virtual screen. This is regardless of weather or not the panel actually resides there or not. Without compiz enabled there is no issue.

[Travis Watkins (amaranth)]

I cannot reproduce this using TwinView on nvidia.

[Travis Watkins (amaranth)]

Sorry, should mention I'm using up-to-date hardy.

[goo25 (cvivanco)]

Same problem without xrandr. I just removed gnome-panel in order to work with avant-window-navigator, and the top part where the panel was, is not properly rendered.
  Turning Compiz off fixes this problem

Hardy Heron
nvidia Geforce 8400M GS

[Paul Natsuo Kishimoto (khaeru)]

Also experiencing this problem using xrandr and TwinView on a Nvidia GeForce FX 5200. In the attached screenshot the top panel has just been dragged from the right monitor to the left. Observe the "ghost" effects on the right-hand monitor. Also observe that the background of the panels is misaligned with the desktop itself. This occurs regardless of where the panels are placed.

nvidia-glx-new-envy 173.14.05+2.6.24.501-501.30
libxrandr2 2:1.2.2-1

[goo25 (cvivanco)]

Try removing gnome-panel (only from desktop) and install it again. I was using only awn for my desktop because of this, and after a couple of weeks I reinstalled gnome-panel and the problem was gone. Check if possibly you could have two instances of gnome-panel started up. Hope this helps.

[ajonat (ajonat)]

I can confirm this. This is a bug in compiz. I don't know if it's fixed upstream, I'm going to check the repo.

Alex.

P.S. This message was really to acknowledge the fact that this bug exist in latest hardy and shouldn't be closed.

[ajonat (ajonat)]

Attached is a screenshot of the "ghosting" that appears when I move gnome-terminal where gnome-panel used to be.

[goo25 (cvivanco)]

Strange behavior with this problem. I thought it was fixed, at least for me, but I connected a projector to my computer, and the problem came back again. I can't figure out how but playing around with different modes on the NVIDIA Xserver settings I was able to fix the window title stuck bug. After restarting the bug is still there.

Another thing I found is that I not able to work with clone screens as It freezes the desktop. I was only able to work with one at a time(my computer or the projector).

NVIDIA Driver 173.14.09
Compiz 0.7.4-0ubuntu7

[ajonat (ajonat)]

This bug should be marked confirmed. It is related to compiz as it happens with different video cards and with metacity it doesn't happen. I don't see a commit in compiz-git regarding this issue so I feel we should fill a bug in upstream git, is this ok?

[ajonat (ajonat)]

I meant upstream compiz in the previous post..

[ajonat (ajonat)]

Link to upstream bug report: http://bugs.opencompositing.org/show_bug.cgi?id=881

[ajonat (ajonat)]

Ok, just wanted to say that this bug is solved upstream. I installed the latest 0.7.6 compiz packages for hardy from https://launchpad.net/~compiz/+archive and it all works now :-)

[Travis Watkins (amaranth)]

Can anyone else confirm this? We have packages newer than that in intrepid right now so this should be fixed there too.

[ajonat (ajonat)]

Hi Travis, I think the bug should be marked as fixed with a workaround
in hardy, I didn't test the latest package for inteprid and there
could be a regression.

On Sat, Jul 12, 2008 at 05:08:20AM -0000, Travis Watkins wrote:
> Can anyone else confirm this? We have packages newer than that in
> intrepid right now so this should be fixed there too.
>
> --
> window title stuck where gnome panel was if moved while using dual head with xrandr
> https://bugs.launchpad.net/bugs/149377
> You received this bug notification because you are a direct subscriber
> of the bug.

[Hew (hew)]

Marking fixed based on the previous comments. Tested as being fixed in 0.7.6, and 0.7.7 exists in Intrepid.