> pxe is working for me in this test virtualbox build. > > $ md5sum initrd.img vmlinuz > 89251241a484010b98280ce00b3a3763 initrd.img > 9261bb24add6bb4ff9ef6aaf348aaf35 vmlinuz > > ( yum updated ) > > [centos at localhost ~]$ uname -a > Linux localhost.localdomain 4.18.0-193.6.3.el8_2.x86_64 #1 SMP Wed Jun > 10 11:09:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux > > [centos at localhost ~]$ cat /etc/redhat-release > CentOS Linux release 8.2.2004 (Core) And it is working here now, too. After replacing the trusty, 8-year old pxelinux.0 with a slightly newer version. Strange that it should break just after C8.1.