https://bugs.documentfoundation.org/show_bug.cgi?id=169637

Michael Weghorn <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Michael Weghorn <[email protected]> ---
For me, with qt6, it's not really transparent (as the title says), but some
kind of grey (but which doesn't match the rest of the popup color, so looks
like a bug indeed).

(In reply to Buovjaga from comment #0)
> Adding Michael W., maybe he has ideas about the kf6 side as Noel's commit
> notes:
> "Sadly this does not fix any of the rendering
> issues with the gen backend, because raw X11
> cannot handle alpha at all. Fixing the rendering
> issues would likely require using the XRender
> API."

That commit looks unrelated for kf6, as it only changes code specific to the
gen VCL plugin.

In fact, bibisecting for kf5 (which should be affected the same way as kf6)
points to the same commit as the Windows one you mention:

> I note that on Windows, the same dropdown became black in
> 088a7c7c451321a800ca8d3523a18b6bb93239b7
> remove alpha device from OutputDevice

Version: 26.2.0.0.alpha1+ (X86_64) / LibreOffice Community
Build ID: 7feaf13cb6c73edf201a6653faa9b839bbd33493
CPU threads: 32; OS: Linux 6.17; UI render: default; VCL: qt6 (cairo+xcb)
Locale: en-GB (en_GB.UTF-8); UI: en-US
Calc: threaded

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