Mel Gorman writes: > On some ppc64 machines, NVRAM is being corrupted very early in boot (before > console is initialised). The machine reboots and then fails to find yaboot > printing the error "PReP-BOOT: Unable to load PRep image". It's nowhere near > as serious as the ftrace+e1000 problem as the machine is not bricked but it's > fairly scary looking, the machine cannot boot and the fix is non-obvious. To > "fix" the machine; > > 1. Go to OpenFirmware prompt > 2. type dev nvram > 3. type wipe-nvram > > The machine will reboot, reconstruct the NVRAM using some magic and yaboot > work again allowing an older kernel to be used. I bisected the problem down > to this commit.
Eek! Which ppc64 machines has this been seen on, and how were they being booted (netboot, yaboot, etc.)? Is it just the Powerstations with their SLOF-based firmware, or is it IBM pSeries machines as well? Paul. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
