Overclocking causes linux boot to hang - Overclock.net

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post #1 of 26 Old 01-17-2011, 07:16 PM - Thread Starter
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I run Ubuntu 10.04 as my main OS on my sig rig. I recently upgraded from AM2/7750/790FX to 1155/2500k/P67 and I'm having some problems getting everything back up.

Solved:
#1. No ethernet - I know this is a driver issue, my old board had a realtek internet driver the new one uses an intel one. Where can I download the drivers (and which should I download ???) on my mac laptop to transfer via USB to my main rig?

#3 Speedstep does not work. If I set my Turbo multi to 40x and load the CPU with prime my Linux doesn't engage turbo and the CPU stays at 3.3 GHz. I looked in /sys/devices/system/cpu/cpu0/cpufreq/ and found a list of supported frequencies, everything from a 16x multi to a 33x multi was listed, but nothing higher.



#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

NET: Registered protocol family 17

That exact same message is always the first one to be printed. I know this isn't simply an unstable CPU because the CPU is fully stable at 4.4 GHz/1.3V, so it should be at least able to boot at 4.5 GHz/1.45v.

On a side note Windows of course BSODs upon booting at stock! Since I didn't really have anything worth while installed on it I'm just going to re-install.
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post #2 of 26 Old 01-17-2011, 07:42 PM
*cough* Stock *cough*
 
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The kernel may be too old to support your CPU properly. After all, 2.6.32 was released in Dec 2009.
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post #3 of 26 Old 01-17-2011, 07:52 PM - Thread Starter
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Okay, I'll try a kernel upgrade. I did get the ethernet working, downloaded drives from intels website. Had to compile them myself (no surprise) but it was nice that it worked without any dependencies. Also, Intels website doesn't even list the 82579 Ethernet chip, so I downloaded the one for 82578 and it seems to be working.

Hopefully the kernel update will fix problems 2 & 3 (might not even be the actual update, might just be the reconfiguring that happens because of it).
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post #4 of 26 Old 01-17-2011, 08:21 PM
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Those drivers should be included in the kernel. I think you just needed to apply new configurations to them (e.g. have them acquire address via DHCP on startup).

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post #5 of 26 Old 01-18-2011, 09:07 AM - Thread Starter
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Okay, a progress update. Updated to 10.10 and got speedstep working. I can change my CPU speed all the way up to 100x44, and using P95 benchmark I get consistent and predictable results (IE, 4.4 GHz produces 33% better times than 3.3 GHz)

However as soon as I go to a 45x multi I can no longer boot. I've tried running with 1.45v and it still didn't boot.

I'm setting the voltage under the "Additional Turbo Voltage" setting, that's okay correct?

EDIT: I just tried adding regular voltage as well from the main screen and still no dice. I've also noticed the boot now hangs at this:

NET: Registered protocol family 17

EDIT2: Running 4.5 GHz of any sort doesn't work, while I can get 100x44 100% stable, 102.3x44 will not boot, hanging at the same place.
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post #6 of 26 Old 01-18-2011, 06:50 PM - Thread Starter
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Still having problems with this. I've tried playing with EFI settings, but no matter what I change I still can't boot above 4.4 GHz.

This is really frustrating... I know I can push this chip a lot more but not with this...

I'm going to be gone on a trip over the next two days away from rig but I still be on OCN. It'd be really great to get a solution to this one.
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post #7 of 26 Old 01-19-2011, 02:45 AM
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You might need a custom kernel, though Ubuntu should have sane defaults with most everything modularized. Is Ubuntu 10.10 pushing 2.6.37 yet (Arch still has 2.6.37 in the official testing repo)? If not, I would highly recommend building 2.6.37 as I have found it to be one of the more stable kernels in recent memory. Might just be the ticket to supporting your setup. Regarding overclocking, my boxes can hold at least a 100 MHz CPU and tighter timings on memory on Linux x64 than Win7 Ultimate 64. Same system, different hard drives of the same model (see sig rig).
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post #8 of 26 Old 01-19-2011, 03:58 AM
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Turn on PLL overvoltage in BIOS.

What do you use to configure CPU frequency? It's not clear, did you end up rebuilding the kernel by hand? I have 10.10 with the 2.6.35 kernel, and I get an impression that it does not have support for speedstep, or something is wrong with it. In particular, the folder /sys/devices/system/cpu/cpufreq/ is empty. Linux boots at 3.3 GHz and I can't find any tools or options to get the frequency back where it should be.

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post #9 of 26 Old 01-19-2011, 06:30 AM - Thread Starter
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I'll try updating the bios, It's still at stock bios eek.gif

I'm overclocking using the "Turbo in Bios" mode where you se each individual turbo setting.

Speedstep does work fine, but it's a bit confusing. For one thing, look in the cpu0/1/2/3 folder un the /system/cpu dir, those folders each have their own freq settings (for each core). Secondly, no matter what your overclock is, this is how the frequencies are listed:

3301 MHz- your turbo overclock
3300 MHz - 3.3 GHz

I've tested this myself, with the CPU set to 4.4 GHz in EFI linux still claims 3301 MHz, however benchmarks scores are 33% better than if I use speedstep to force the CPU to 3.3 GHz.

The cpu scaler has another bug, in that it doesn't correctly set scaling_min_freq. When I boot the CPU is stuck at 4.4 GHz because scaling_min_freq is 3301 MHz. If I manually set it too 1.6 GHz then the CPUu autoscaler will start working and the CPU will scale back to 1.6 GHz.
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post #10 of 26 Old 01-20-2011, 05:51 PM - Thread Starter
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Updated the EFI to ver. 1053, still having problems. Now when I set my CPU to 4.5 GHz the board won't even post frown.gif.

I'm beginning to think this might be a fault of the board/EFI and not the OS.
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