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Overclocking causes linux boot to hang - Page 2

post #11 of 26
Ever thought that you just can't hit 4.5? My friend tried hitting just 4.0 with an i5 and he couldn't even do that.
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post #12 of 26
Thread Starter 
It was never a question of CPU stability as the boot hung at the same place every time unlike when it crashes randomly with the message "Fatal-Unstable Machine" like it does when I run 4.4 GHz/1.1V.

Anyways, I fiddled around with the EFI settings and I've now booted at 4.5 GHz. I think I just needed to change some settings from auto to what they should be.

Now to fix my bug...

https://bugs.launchpad.net/ubuntu/+s...ux/+bug/704567
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post #13 of 26
Thread Starter 
And.... I've managed to raise the limit before I get Net 17 error to 4.9 GHz, currently stability testing for 4.9/1.45v. No idea how low I can get the voltage, but I think at this point I might just stick with 4.9 GHz for 24/7 usage (or until I figure out why I can't boot/update fixes the problem).

Can't boot at 5 GHz though. .
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post #14 of 26
In the region above 4.5, each 0.1 GHz requires about 0.05 V additional Vcore. So if you can boot at 4.9 with 1.45 V, you'll need 1.50 V to boot at 5.0.
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post #15 of 26
Quote:
Originally Posted by charliehorse55 View Post
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).
My problem is that I don't see ANY frequency-related settings in sys:

Quote:
user@host:/sys/devices/system/cpu$ ls -R
.:
cpu0 cpu1 cpu2 cpu3 cpufreq cpuidle kernel_max offline online perf_events possible present probe release sched_mc_power_savings

./cpu0:
cache crash_notes node0 thermal_throttle topology

./cpu0/cache:
index0 index1 index2 index3

./cpu0/cache/index0:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu0/cache/index1:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu0/cache/index2:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu0/cache/index3:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu0/thermal_throttle:
core_power_limit_count core_throttle_count package_power_limit_count package_throttle_count

./cpu0/topology:
core_id core_siblings core_siblings_list physical_package_id thread_siblings thread_siblings_list

./cpu1:
cache crash_notes node0 online thermal_throttle topology

./cpu1/cache:
index0 index1 index2 index3

./cpu1/cache/index0:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu1/cache/index1:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu1/cache/index2:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu1/cache/index3:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu1/thermal_throttle:
core_power_limit_count core_throttle_count package_power_limit_count package_throttle_count

./cpu1/topology:
core_id core_siblings core_siblings_list physical_package_id thread_siblings thread_siblings_list

./cpu2:
cache crash_notes node0 online thermal_throttle topology

./cpu2/cache:
index0 index1 index2 index3

./cpu2/cache/index0:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu2/cache/index1:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu2/cache/index2:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu2/cache/index3:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu2/thermal_throttle:
core_power_limit_count core_throttle_count package_power_limit_count package_throttle_count

./cpu2/topology:
core_id core_siblings core_siblings_list physical_package_id thread_siblings thread_siblings_list

./cpu3:
cache crash_notes node0 online thermal_throttle topology

./cpu3/cache:
index0 index1 index2 index3

./cpu3/cache/index0:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu3/cache/index1:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu3/cache/index2:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu3/cache/index3:
coherency_line_size level number_of_sets physical_line_partition shared_cpu_list shared_cpu_map size type ways_of_associativity

./cpu3/thermal_throttle:
core_power_limit_count core_throttle_count package_power_limit_count package_throttle_count

./cpu3/topology:
core_id core_siblings core_siblings_list physical_package_id thread_siblings thread_siblings_list

./cpufreq:

./cpuidle:
current_driver current_governor_ro

./perf_events:
overcommit reserve_percpu
this is with a brand new install of Ubuntu 10.10 as of 2 days ago.

/proc/cpuinfo reports the CPU frequency as equal to 3292.947 and that seems to be the correct value. In Windows, of course, I get the correct frequency, equal to the BIOS setting (4.6).
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post #16 of 26
Thread Starter 
That's funny, I get the correct frequencies after the bios update now. With my EFI set to 4.9:

cat scaling_available_frequencies
4801000 4800000 4700000 4600000 4500000 4400000 4300000 4200000 4100000 4000000 3900000 3800000 3700000 3600000 3500000 1600000

Are you overclocking through Turbo boost or through Gigabyte's weird thing that locks the CPU at 100% speed?
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post #17 of 26
I'm overclocking through the CPU multiplier setting. There are some turbo-related settings: "allow the OS to control the multiplier", "turbo on/off", but they don't seem to have any effect.
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post #18 of 26
Thread Starter 
Yeah CPU scaling would work if you switched to using the turbo multiplier.

Also, this isn't a question of CPU stability.
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post #19 of 26
Maybe Gigabyte just needs a different ACPI driver that's not supported by 2.6.35.
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post #20 of 26
Thread Starter 
Quote:
Originally Posted by hamster3null View Post
Maybe Gigabyte just needs a different ACPI driver that's not supported by 2.6.35.
That might also be the case. I'm going to try updating to 2.6.37 and see what happens.
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