On Sun, Jun 22, 2014 at 2:48 PM, Anssi Johansson <centos at miuku.net> wrote: > I'm currently testing this boot.iso from the secureboot directory: > 362807296 Jun 21 00:59 /tmp/boot.iso > When I enter the boot menu with F12 and select my USB stick, I get a > nasty "Invalid signature detected. Check Secure Boot Policy in Setup". > RHEL7rc1 doesn't boot with these settings either. Disabling Secure Boot > lets me boot from the USB stick, and the media check passes. Please advice. How did you write to the USB stick? By using the dd command? Just to be sure, the boot.iso file that worked for me has this hash value: $ sha256sum boot.iso 4860e0deb8d8b6b02ce644bae208fc6973d94155beaa0885b8f865303d730067 boot.iso Akemi