On Sep 7, 2024, at 9:17 AM, JD Smith <jdtsmith@gmail.com> wrote:

On Sep 7, 2024, at 2:51 AM, Po Lu <luangruo@yahoo.com> wrote:
I am also interested to know precisely which Cairo builds fail to
display them, the stipple implementations being virtually identical
across the PGTK and the X + Cairo builds.

The Cairo issue has been harder to track down.  Several users have reported Cairo builds which fail to display stipples.  I gather Cairo is the default so this must be a sporadic failure.  Recently a user with identical builds on two different machines, with the precise same version of GTK3 and Cairo, found that one system shows stipples correctly, the other omits them entirely.  On the non-working system, compiling --without-cairo resolves this.

Po, did any potential causes for intermittent stipple display among identical Cairo builds occur to you?  Anything obvious to test?