Xfce Forum

Raboo

Member

Registered: 2025-11-01

Posts: 3

App window weird transparent box issue

Hi

I'm running an older version of XFCE4 v4.16.0 (I'm on Rocky Linux 8.10). I'm using something called Amazon DCV which is simular to VirtualGL, i.e. enable graphic acceleration on remote desktop.

I get this weird transparent square, doesn't matter if I move, resize etc...
The size of the box matches a splash screen that the app has, however the splash screen was not in the top left, it was centered..

If I disable the splash screen I get a smaller transparent box instead.

The only output from the application in console is:

qt.qpa.xcb: internal error:  void QXcbWindow::setNetWmStateOnUnmappedWindow() called on mapped window

Any ideas on how to get rid of this issue?

Raboo

Member

Registered: 2025-11-01

Posts: 3

Re: App window weird transparent box issue

Turning off compositing in "Window Manager Tweaks" seems to have fixed the issue..
But that feels like a work-around and not a fix as it turns of a lot of styling.

Side quest; If I want to turn off compositing globally for all users, would it be /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml?
Would it be enough to have this in /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml file?

<?xml version="1.0" encoding="UTF-8"?>
<channel name="xfwm4" version="1.0">
  <property name="general" type="empty">
    <property name="use_compositing" type="bool" value="false"/>
  </property>
</channel>

Or do I need to include all other properties in the file?

ToZ

Administrator

From: Canada

Registered: 2011-06-02

Posts: 12,309

Re: App window weird transparent box issue

Turning off compositing in "Window Manager Tweaks" seems to have fixed the issue..

Try testing with different vblank modes. See: https://forum.xfce.org/viewtopic.php?id=13233

Side quest; If I want to turn off compositing globally for all users, would it be /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml?

Only for user accounts that have not yet been created. For existing accounts, you will need to go into each individual's config directory and make the change while they are not logged in, or create a user startup script that runs the command:

xfconf-query -c xfwm4 -p /general/use_compositing -s false

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Raboo

Member

Registered: 2025-11-01

Posts: 3

Re: App window weird transparent box issue

Try testing with different vblank modes. See: https://forum.xfce.org/viewtopic.php?id=13233

I only have vblank=off|glx.
I installed libXpresent, but still i can't switch to xpresent mode

xfwm4: Unrecognized compositor option "xpresent".

I tried with glx and off, no differences.

ToZ

Administrator

From: Canada

Registered: 2011-06-02

Posts: 12,309

Re: App window weird transparent box issue

Right, you're using 4.16. The option didn't exist back then.

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Mark solved threads as [SOLVED] to make it easier for others to find solutions.
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