[Bug 104599] corrupted desktop graphics with latest git intel driver

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=104599

--- Comment #6 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
(In reply to Tapani Pälli from comment #4)
> (In reply to Mario Kleiner from comment #3)
> > This is running the new GNOME based Ubuntu GUI with Gnome-Shell Wayland,
> > right?
> > 
> > With "Windows control did not work" you mean it doesn't respond to
> > mouse-clicks?
> > 
> > In that case it is known bugs/limitations in gnome-shell for depth 30/10bpc
> > mode. GNOME Shells picking code can't handle 10 bit per color channel.
> > 
> > Additionally Gnome-Shells Wayland compositor doesn't handle anything but
> > bgrx8888 or bgra8888 framebuffers in its drm/kms backend. It takes whatever
> > framebuffer format it gets, e.g., bgrx1010102 and hands it to the kernel as
> > bgrx8888, so the gpu misinterprets a 10 bit image as a 8 bit image during
> > scanout, which ends badly.
> 
> Right, so this is NOTOURBUG. Zebulon, your issue should disappear when you
> do apt-get update again since allow_rgb10_configs defaults to 'false'.
> 
> Mario, do you know if there us existing Gnome bug about this? (did not find
> such) Maybe easiest workaround for them would be to ignore 10bpc until
> picking and kms backend is fixed.

None that i would know of. I haven't filed one so far.

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