Okay, to try to narrow this down a bit, I setup a very large AWS Fedora 33 instance and built chromium packages, then installed them into a second Fedora Rawhide instance.
As before, these packages work fine. (This is our baseline)

Next, I updated glibc (and JUST glibc, glibc-common, glibc-devel, glibc-headers, glibc-langpack-en) from Rawhide on the Fedora 33 instance and built the chromium package again. This build, when installed into Fedora Rawhide, exhibits the text rendering issue.

This makes me very suspicious of something in glibc between 2.32 (Fedora 33) and 2.32.9000 (rawhide), but I'm not sure where to look from here. Any ideas?

~spot

On Sun, Jan 3, 2021 at 4:49 AM Mattia Verga via devel <devel@lists.fedoraproject.org> wrote:
Il 02/01/21 22:57, Kevin Kofler via devel ha scritto:
> Tom Callaway wrote:
>> I rebuilt chromium, but it did not resolve the issue.
> So what can we do to resolve the issue? Surely we cannot leave both Chromium
> and Falkon unable to render text forever.
>
>          Kevin Kofler
> ___

The problem seems to be qt5-qtwebengine is unable to use system fonts.
It doesn't render text using default fonts (i.e. 'serif' or 'sans-serif'
css styles), but it does render text using custom css fonts. In fact, it
renders most of qt.io homepage (using 'Titillium Web' custom css font)
and also some text on Bodhi homepage (using 'Open Sans' custom css font).

However, opening, for example, Falkon settings, I can get the fonts
under the Character settings and the preview works.

Mattia

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