On 14.05.2014 05:47, jordan wrote:

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I had not been able to boot my Phenom II X4 910e PC with any of the
latest RT kernels (3.12 after 3.12.5-rt7 or 3.14 or not even the
latest 3.10 versions) until I today disabled AMD C1E from BIOS. An
other way to get it to boot was "acpi=off" as a parameter to kernel
but I need "button". I tried many others "processor.max_cstate=0",
"processor.nocst", etc...

Without RT patch the "AMD C1E" is not a problem.

Kimmo, have you tried reverting the 3 patches that some of us have had
success in using to get a booting system?

you can get the patch here; http://pastebin.com/VG7X5WjK ... it
applies over 3.14.3-rt5 [after you've already applied the -rt patch,
you apply it]. It's yielded working AMD Phenom systems for me
[although, i don't have the exact same H/W as you]. it might be worth
a try, just to see if it works.

I can confirm that applying the patch in http://pastebin.com/VG7X5WjK to 
3.14.3-rt5 makes my system bootable even with AMD C1E enabled.
To clarify my previous email, those other tricks 
"processor.max_cstate=0", "processor.nocst", etc... did not help.

Kimmo

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OK, so I never got back to finding a system that could reproduce this,
but it sounds like it is still worthwhile; thanks for the reminder and
I'll go see if I can reproduce this on a quad since the six core was OK.

Hey Paul, I also forgot to get back to you ;) ... I had been carrying
over my .config - so i tried using defconfig too [just to see] and it
was no different. I was astonished that yours booted up just fine,
because i know of other AMD users [aside from Kimmo] who can't boot on
vainlla-rt... Again, 3.14.x-rtX boot and work just fine for me, by
reverting those patches. I had thought maybe -rt5 would boot [it
looked to have some substantial changes], but alas -rt5 also required
the patch for a working system.

Jordan

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P.
--

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Cheers
Kimmo

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