[Mesa-dev] [Bug 103699] Latest mesa breaks firefox on kde plasma with compositing on

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Dec 1 06:09:55 UTC 2017


--- Comment #24 from Tapani Pälli <lemody at gmail.com> ---
(In reply to Fredrik Höglund from comment #23)
> (In reply to Tapani Pälli from comment #22)
> > (In reply to Fredrik Höglund from comment #20)
> > > Created attachment 135782 [details]
> > > modified test case
> > >
> > > The window decoration is a separate texture in kwin, so the decoration
> > > should be rendered normally even if the fbconfig is causing a blending issue
> > > with the window contents. I think it is more likely that binding the pixmap
> > > to a texture failed, and kwin is skipping the window entirely as a result.
> > >
> >
> > It is possible that there are 2 separate issues. One is the rendering
> > results of krunner, panel and launcher menu, that is way too dark and then
> > there are these invisible windows. Both get fixed by not setting sRGB
> > capable config for 32bit visual, which I think is correct thing todo since
> > there is only 1 such (non-conformant) visual exposed.
> Yes, I believe the dark windows is a result of Qt not using the ARGB visual
> for those windows, so the background which is supposed to be translucent is
> solid black.
> I don't disagree with the solution, but I don't think these are blending
> issues; it's rather that applications are looking for a non-sRGB capable
> fbconfig associated with the ARGB visual, and either giving up or falling
> back to a non-ARGB visual after not finding one.

Yep having done some more investigation I do agree it's not about blending,
it's about getting wrong kind of visual. I'll wait for review comments on the
xorg change.

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