[Nouveau] [Bug 89730] NV50: LightDM GTK+ Greeter Background - inconsistent display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89730

--- Comment #9 from poma <pomidorabelisima at gmail.com> ---
(In reply to andrew p. from comment #7)
> Some clarifications:
> - Greeter is usual GTK3 application.
> - No WM or compositor run in greeter session.
> - Greeter creates one GtkWindow for each monitor.
> - Greeter uses standard cairo functions to draw monitor's window background.
> 
> There are no "login" or "panel" windows - just child widgets inside
> fullscreen window.
> This grey color looks like default window color - just set
> "background=#default" to see it.
> So, the question - why gtk draw semi-transparent panel correctly (using
> parent window background as base) and do not do it for "free" space.
> 
> Add "allow-debugging=true" option to lightdm-gtk-greeter.conf to get more
> informative log.
> 
> Some questions:
> 1. What happened if background is color (#0f0)? I don't expect that there
> will be any difference, just interesting.
> 2. Another gtk theme? Or empty "theme-name=".
> 

Color codes work OK, theme also does not affect the final outcome.
background color (#0f0) - green, works OK as any other.

> I saw very similar bug some time ago - laptop with archlinux and catalyst.
> In some cases gtk didn't draw whole windows except some widgets (text
> entries - blinking cursor). But this bug is gone now.

Thanks for answering.

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