The test kernel of #57 works well for me. Before I could trigger the
hangs immediately and frequently (every few seconds) when running the
linuxcnc simulator (heavily using mesa GL I guess) on an i9-9900K
desktop and kernel 5.3.0-46, that is gone with the test kernel. I never
saw the problem on my
Just found out that it was caused by files from an old version of font-manager
in my home directory (namely .fonts.conf as well as folders under .local,
.config and .cache)
Removing .fonts.conf resolved the problem for me.
Running evince inside 'valgrind' did work even with the font-manager
conf
