On Fri, Sep 07, 2012 at 04:32:56AM -0700, Adko Branil wrote: > After updating bios no more crashes happened, i tested it many times > on heavy HDD IO loads, with many kernels (including CONFIG_PREEMPT > kernels). Alriiight, one of the most seldom times where a BIOS update actually fixes things :-). > But now if enable "Cool'n' Quiet" option in bios, > CONFIG_PREEMPT_VOLUNTARY kernel with passed "nosmp" at boot time, > crashes during boot process with kernel panic, while CONFIG_PREEMPT > kernlel without "nosmp" works fine - but it is another story i > think, should not be related with the crashes when it was old bios, > and i think it is probably "nosmp" the reason. Hmm, Cool'n'Quiet enabled actually means that you have _PSS objects and powernow-k8 should be detecting the P-states properly. Can you catch dmesg from that machine twice? * one with Cool'n'Quiet disabled * one with the kernel panic > (i have never changed cpu frequency of this cpu at all) When "Cool'n' > Quiet" is disabled, the system works perfectly adequately with all > kind of kernels i tried. Except that this warning message in dmesg > still appears (if it is problem at all). I put here this message for > "nosmp" case as well, kernel is 3.5.2: Right, so AFAICU, you can run a CONFIG_PREEMPT kernel perfectly fine now after the BIOS update, right? If so and when you say that the oopses started happening after an electrical instability, I'd venture a guess that something got damaged in the BIOS EPROM and since you've flashed it anew, the corrupted data got overwritten and so no more crashes. Correct? -- Regards/Gruss, Boris. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html