Theo Alas your suggestion failed as show below.
>From a cold boot using: * using a USB keyboard the machine responds to: boot> boot -c and then at UKC> there is no displayed response to any keypress and the machine appears to have hung. Timed roughly with a wristwatch, >10 minutes later the display still shows: L1 [using 4019840 bytes of bsd ELF symbol table ] ... L10 User Kernel Config L11 UKC> * using a PS2 keyboard the machine responds to: boot> boot -c and then the keyboard and machine also respond to: UKC> disable amdgpu0 UKC> quit The machine begins to boot but when it reaches: ... WARNING: clock gained 2 days WARNING: CHECK AND RESET THE DATE! the displayed output remains constant for >= 90 seconds. Then the fan speeds increase and the display goes black and blank. When I have posted this mail to bugs@ I will begin preparing to build a new kernel that incorporates Jonathons diff changes. The local time where I am is 15:35 on the 8th of March. In case something further that may be helpful is suggested, I will delay my build on a separate machine until 20:00 (my time) tonight. Ideally, my kernel build will need to be in sync with the install75.img files on the troublesome machine? So, to reduce the chances of out of sync errors, I will build a kernel and create a release to install with a USB flash drive on the troublesome machine. My local cvs repository is reposync'ed (usually) daily from rsync://anoncvs.au.openbsd.org/cvs/ in Brisbane. I will update it and then update my /usr/src directory before building. -- aer