[winswitch] Weird problem with display going transparent?

Perry E. Metzger perry at piermont.com
Tue Sep 18 19:54:18 BST 2018

On Sun, 16 Sep 2018 10:35:33 +0700 Antoine Martin via shifter-users
<shifter-users at lists.devloop.org.uk> wrote:
> On 16/09/2018 07:13, Perry E. Metzger via shifter-users wrote:
> > I'm on MacOS 10.13.6. At times, xprm  
> Do you mean xpra?

Sorry, keyboard slip, yes, xpra.

> > windows I'm using become
> > partially or fully transparent for no obvious reason. (Partially =
> > portions of the window become transparent, not that the window
> > becomes semi-transparent.)  
> Does this affect all windows or only the ones from specific
> applications?

I notice it more often with terminal applications, but it seems to be
happening without much rhyme or reason.

> You can try running the client with "--debug metadata".
> The log output should tell us if the window is meant to be using
> transparency to begin with. (ie: window opacity or alpha channel)

I'll try that, and the rest of your suggestions.

> > This clearly is a bug of some sort. Any idea what might be
> > triggering it or what workarounds might be?  
> run your client or server with:
> XPRA_ALPHA=0 xpra ...
> This is a big hammer which will disable transparency completely for
> all windows. (not ideal but acceptable as a workaround)
> Since only part of the windows are transparent, this could also be
> caused by one of the picture encoders wrongly setting the alpha
> channel
> - you should be able to confirm that by changing the picture
> encodings. (ie run with: --encodings=rgb,png)
> Otherwise, the bug may be triggered by the client rendering
> backend, try turning OpenGL on or off.
> Cheers,
> Antoine
> > 
> > Perry
> >   
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Perry E. Metzger		perry at piermont.com

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