bug#59306: 29.0.50; Resurrected bug?

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Po Lu <luangruo@yahoo.com> writes:

> Dmitry Gutov <dgutov@yandex.ru> writes:
>
>> Since this bug sounds similar or at least related to bug#58912, I
>> probably should comment:
>>
>> Rebuilding from the latest master makes the scenario in bug#58912 much
>> better, in that the font size is applied correctly at the end.
>>
>> It's still different from Emacs 28 in that the frame size goes through
>> an extra transition at the end of loading. And sometimes through 1
>> more (the last one the same as the -2nd one). So sometimes I end up
>> with a window of 84x37, and sometimes (less frequently) 80x35. All
>> according to window-height and window-width.
>>
>> Emacs 28 and an older build of master both end up at 80x35.
>>
>> But at least the font size and family are ok now.
>
> I guess Cairo just refuses to tell us what the DPI it defaults to using
> is, so Emacs always ends up having to redraw the fonts at startup.
>
> Please give me a while to think up a solution.

Please see whether or not Emacs now behaves satisfactorily wrt this.