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Overclocking causes linux boot to hang - Page 3

post #21 of 26
Quote:
Originally Posted by charliehorse55 View Post
#2 (More important): My rig won't boot if I put my CPU multi over 44. Voltage is irrelevant, I tried 45x multi with 1.45v and it still wouldn't boot. I get to the grub screen and after I pick my kernel I'm left with a blinking cursor. I turned off quiet/splash to diagnose the problem and the boot hangs at
Is your OC stable? It might not be Ubuntu's fault. If you have a Windows partition, does it boot properly?
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post #22 of 26
Thread Starter 
I know it's not my OC, because earlier when the boot hung at 4.5 or higher I tried 4.5 GHz at 1.45v. It still hung, and in the exact same place. Now I'm at 4.9/1.45v 100% stable, so I'm pretty sure 4.5/1.45v is stable as well.

Also, when I try to boot with an obviously unstable OC I get a much different message and it changes every time. The fact that the boot hangs at the exact same message every time regardless of any EFI settings points to a software issue.

While I'm happy with 4.9 GHz for 24/7 anyways because I don't want to go any higher than 1.45v, it would be nice to boot at 5 GHz for benching..

Anyways, when I get around to installing Windows I'll post back with my results.
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post #23 of 26
Quote:
Originally Posted by charliehorse55 View Post
While I'm happy with 4.9 GHz for 24/7 anyways because I don't want to go any higher than 1.45v, it would be nice to boot at 5 GHz for epeen..
Fixed it for truth.

Maybe it has something to do with the UEFI vs BIOS on your board?
    
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post #24 of 26
Ok, so, finally, I'm not sure what happened, but, with Gigabyte BIOS F6 and Linux kernel vmlinuz-2.6.35-25 (and possibly a CMOS setting wipe that normally happens when you reflash BIOS), I got all the necessary entries in /sys/devices/system/cpu and now I can configure my CPU frequency from Linux too.
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post #25 of 26
Thread Starter 
Quote:
Originally Posted by hamster3null View Post
Ok, so, finally, I'm not sure what happened, but, with Gigabyte BIOS F6 and Linux kernel vmlinuz-2.6.35-25 (and possibly a CMOS setting wipe that normally happens when you reflash BIOS), I got all the necessary entries in /sys/devices/system/cpu and now I can configure my CPU frequency from Linux too.
Cool, but are the correct frequency scaling setting automatically detected?
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post #26 of 26
Looks basically the same as this

http://www.overclock.net/linux-unix/...l#post12087605

If I set the BIOS multiplier to 44, entries go up to 4301000 (and 4301000 really seems to mean 4.4 GHz, or at least there's a small but significant difference in performance between 4300000 and 4301000).
Edited by hamster3null - 2/5/11 at 7:22pm
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