It's got, according to lspci
01:00.0 VGA compatible controller: Neomagic Corporation [MagicGraph 256ZX]I'm using the xserver-common (4.1.0-6) driver, with, if it matters, the UseFBDev option set (value="true").
I've found a few references to artifacts under X, but nothing that seems to match my situation closely. Looking for more information.
And your are most emphatically not to inquire about the hostname.