On Tue, 08 Feb 2022 19:57:56 +0800 Po Lu <luangruo@yahoo.com> wrote:

> Stephen Berman <stephen.berman@gmx.net> writes:
>
>> With Emacs built from master without pgtk, I start with -Q and evaluate
>> the following sexps, yielding the results shown:
>>
>> (alist-get 'left (frame-parameters))
>> 939
>>
>> (alist-get 'top (frame-parameters))
>> 371
>>
>> With Emacs built from master with pgtk, I start with -Q and evaluate
>> the same sexps, yielding the following results:
>>
>> (alist-get 'left (frame-parameters))
>> 0
>>
>> (alist-get 'top (frame-parameters))
>> 0
>>
>> The results in the non-pgtk build are correct: the frame is in the
>> middle of the screen, not in the upper left corner.  This is with Xfce
>> and the xfwm4 window manager.
>
> Thanks, should be fixed now on master.

Thanks very much, I confirm your patch essentially fixes the bug, except
for mistakenly switching the top and left parameters: