SuSe 12.2 and overclocking

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1

Sirs,

I have SuSe 11.3 installed on the same system and have run it overclocked for quite some time. I have run mprime for 12 hours and the the system does not over heat and is as solid as a rock. I discovered that I had to remove the overclock whilst installing 12.2. What is distressing is that now I cannot get 12.2 to boot while overclocked. I can still boot the 11.3 system fine with the overclock (it is in a separate partition.) I think that the problem is related to the “fast boot” feature? How do I turn this off? Or is there something else that prevents SuSe 12.2 from booting on an overclocked system?

Thank you for your responses and I apologize if this has been asked before. I searched the forum and didn’t find this exact subject. (If I missed it, please just direct me to where it is discussed.)

Thank You,
The Kapt’n

2

Sirs,

Just an update on what I have tried so far:

I switched from GRUB2 to GRUB and added another boot option. I cloned the existing 12.2 entry and removed the trailing commands (as they didn’t exist on the 11.3 boot command that DOES work). I removed " splash=silent quiet showopts". I didn’t expect it to work (and it didn’t). Still boots normal, but hangs on the overclock boot.

I should also include the message I got from trying to install while overclocked. (I had to write it down on paper, so it may not be complete.)

Starting udev… udevd[123]: RUN+=“socket:/org/kernel/dm/multipath_event”
support will be removed from future releases
Please remove it from /etc/udev/rules.d/71-multipath.rules
and use libudev to subscribe to events

I have looked at this file and sure enough it seems to contain the offending line.

I am not sure what I need to replace this with.

Anyone have any suggestions?

Thanks again,
The Kapt’n

3

Over clocking is iffy. sometimes it works sometimes it does not. Something in the new system is over stressing things.

4

Gogalthorp,

Looks like you might be correct. I backed the overclock off by 2.5% and it started booting. Unfortunate that I will have to revailidate this system all over again and lost valuable clock cycles in the bargain. You would think that stable hardware is stable. I will load sensors, gkrelm and mprime and get to work. Thanks for the reply.

Here is the tale of the tape, for anyone who might be interested.

Hardware:
Intel i5 760 (2.8 GHz nominal)
8 GB G.Skill 1600 DDR3
GA-P55A-UD3 MoBo

Original Clock:
CPU 4.0 GHz
Memory 1600 MHz (rated speed)

Degraded performance required by 12.2:
CPU 3.9 GHz
Memory 1560 MHz

(I may try bumping it the other way to see if 4.0GHz is just a dead spot :P.)

The Kapt’n

5

It is a issue of timings and how instructions are called. Why do you need to over clock, that hardware is quite fast anyway or are you just a speed freak :slight_smile:

Good luck

6

On 2012-09-17 03:36, kaptdeath wrote:

> You would think that stable hardware is stable.

By definition, overclocking is not stable.

–
Cheers / Saludos,

Carlos E. R.
(from 12.1 x86_64 “Asparagus” at Telcontar)

7

Well, I did run in the same issue as kaptdeath](http://forums.opensuse.org/members/kaptdeath.html) Thanks for sharing this issue. :good:
Reduction of the OC by 1 step (-4,6% in my case) made it stable. It must be something in the new kernel but hey I can live with that.

Greets, Fire!