Messages in this thread | | | Date | Thu, 30 Oct 2008 17:05:22 -0400 | From | Josh Boyer <> | Subject | Re: 2.6.28-rc1: NVRAM being corrupted on ppc64 preventing boot (bisected) |
| |
On Fri, Oct 31, 2008 at 07:52:02AM +1100, Paul Mackerras wrote: >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?
I'm pretty sure it was with pSeries machines. I saw reports of POWER5 being effected (p520 and p710). I believe one of them resolved the issue by upgrading firmware on the machine.
josh
| |