On 03/31/2011 07:41 AM, Alan Cox wrote: >> >> What it was was bad power supplies or low-capacitance, high-inductance >> power distribution that happened to work with MS-DOS which always burned >> the CPU at 100% and therefore left the power draw relatively consistent >> current. A proper OS putting the CPU in HLT produced a lot more high >> frequency noise on the power busses, with disastrous results without >> proper bypass. > > And also chipset errata in some cases - eg some revisions of the CS5510 > hung the box solid if a CPU hlt occurred during an IDE transfer. I don't > think any CS5510s are still around although I've had mail from someone > with a CS5520 in use not that long ago so who knows! > > The joy of ancient history. Ah, yes, I guess there was a special cycle on the bus which the chipset could misinterpret. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
