On Wed, 9 Dec 2020, Michael van Elst wrote:
So the last buffered output isn't flushed. Depending on your xdpyinfo generated output, this might be everything. You also see in the trace that xdpyinfo exits with code 3 in either case.
Ah! I missed that. I should've checked my ktrace for the exit status too. Yours looks like the correct explanation. Thanks. -RVP