Core i5-750 support with cpufreq?

deukalion · 2010-06-22 15:40:33

Hey.

I'm wondering if anyone who has a Intel Core i5-750 has gotten the CPU to work with cpufreq?
cpufreq-info shows no info and I can't load any of the modules except "speedstep" in the wiki guide; which doesn't do anything in particular anyway.

Anyone knows if there IS support for i5 or is there another way to set up CPU scaling?

Thanks.

PS. I'm using Arch64

Last edited by deukalion (2010-06-22 15:41:39)

iceman81 · 2010-06-22 16:38:54

I am using an i7 920 and with acpi-cpufreq everything is fine.

deukalion · 2010-06-22 19:39:21

Then what could be wrong with mine?

Ultraman · 2010-06-23 09:07:56

Have it working fine with a Core i7 860, which stand a little bit closer to the i5 than the i7 920 does. Does 90% of his time on 1200MHz now
Also running Arch x86_64.

Are you completely up to date (consider using other mirrors)?
What kernel are you using, stock or something else?
Does the modprobing of the acpi_cpufreq module output anything interesting? Also check dmesg.
And postiing your dmesg output might come in handy as well.

Also, make sure EIST is enabled by your motherboard and it's BIOS.
Does it support it? Have you enabled EIST in the BIOS?
Are you running an overclock or not?

More info svp

rulex · 2010-06-23 10:44:14

I have i5 750 and its been working since i first installed cpufrequtils and modprobe acpi-cpufreq

$ grep model.name /proc/cpuinfo  
model name    : Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz

$ cpufreq-info -c 0
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.67 GHz
  available frequency steps: 2.67 GHz, 2.67 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.20 GHz and 2.67 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.20 GHz.

deukalion · 2010-06-24 00:28:49

I haven't changed anything with the CPU; but I know it runs around 2.72GHz and not 2.67... could this be the problem? It was standard. Have to check if EIST is enabled; don't know what it is though.

grep model.name /proc/cpuinfo

model name    : Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
model name    : Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
model name    : Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
model name    : Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz

cpufreq-info -c 0

cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  no or unknown cpufreq driver is active on this CPU
  maximum transition latency: 4294.55 ms.

modprobe acpi-cpufreq

FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.34-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device

Last edited by deukalion (2010-06-24 00:29:29)

flamelab · 2010-06-24 00:31:48

It works OK here.

deukalion · 2010-06-24 01:07:30

I just updated my BIOS, activated EIST.
Now it works; don't know which of those fixed it.

However, my speed is 2.67 or 2.72 in BIOS but cpufreq-info returns the maximum value of 2.26GHz? Why can't it read it correctly?

TigTex · 2010-06-24 01:09:50

Core i5-750 has a native speed of 2.67ghz and goes up to 3.2ghz in turbo mode. read this http://ark.intel.com/Product.aspx?id=42915

The frequency reported is 2.67ghz. It's all OK. you get higher speeds with turbo mode, automaticaly enabled. I think that acpi cpufreq doesn't control the turbo mode. it's controlled by the cpu it self. So, you may get speeds up to 3.2ghz when you have 1 thread running at fullload and your cpu is cold.

Last edited by TigTex (2010-06-24 01:15:44)

deukalion · 2010-06-24 01:14:21

ACPI Driver bug in BIOS or in Linux?

One strange thing about my computer (don't know if this is relative, or if this is an error) is that when I have had it unplugged / turned off... it starts for 1-2 seconds, turns off, waits 3 seconds and then starts again. Could this be something that might be causing it? My power supply? (Strange though, it doesn't seem to do it if I unplug my harddrives)

Core i5 750
Gigabyte GA-P55A-UD3
1600mhz Corsair XMS CL8

deukalion · 2010-06-24 01:16:02

I just bought it last week, so this is new - used the Power supply in my old computer without any problems.

TigTex · 2010-06-24 01:17:17

I edited my above post. What i said made no sense at all

I think that everything is fine... Check your power supply voltage on bios and read the POST messages (the pc bootup).

What graphics card do you have? Since the core i5 only uses 95watt, if you dont have a extreme gpu, a 450w power supply is more than enough

Last edited by TigTex (2010-06-24 01:34:42)

deukalion · 2010-06-24 01:20:26

So, 2.26 is okay and afterwards Turbo Mode kicks in?
I don't wanna mess with the power supply voltage unless I know what I'm doing - and I don't know what settings to set.

deukalion · 2010-06-24 01:20:59

Asus 9500 GT "Top" 512mb DDR3 (Top is the name of the ASUS series)

deukalion · 2010-06-24 01:22:21

Full system:
Core i5 750
Gigabyte GA-P55A-UD3
1600mhz Corsair XMS CL8
Asus 9500 GT "Top" 512mb DDR3
AXP 500W Power Supply
1 640GB Western Digital Black SATA 600 64mb
1 1000GB Western Digital Black SATA 300 32mb
1 Samsung Spinpoint DVD/RW
Cooler Master 921 HAF, 4 fans included

Last edited by deukalion (2010-06-24 01:23:01)

TigTex · 2010-06-24 01:22:46

modprobe acpi-cpufreq

is incorrect.

use

modprobe acpi-cpufreqd

-> once again i made no sense here... acpi-cpufreq is the correct.

Your power supply looks like is good enough for your system, no need to worry

ps: avoid doing 3 consecutive posts. edit instead

Last edited by TigTex (2010-06-24 01:27:10)

deukalion · 2010-06-24 01:25:39

modprobe acpi-cpufreqd
FATAL: Module acpi_cpufreqd not found.

even installed cpufreqd.

deukalion · 2010-06-24 01:27:30

Yeah, but is it normal when a computer turns off for a few seconds and then starts when turned off from 'off state' - doesn't sound like it.
But I've noticed something else, or it's just me being unusual to a pretty new system for awhile is that it doesn't seem to reboot as old systems either. It's like it reboots while still being active, not rebooting (ctrl+alt+del closes open dvd-tray and such..)

EDIT:
If I edit it doesn't look much like a thread, unless you want to change something you've said (like you've done a few times)

Last edited by deukalion (2010-06-24 01:28:47)

flamelab · 2010-06-24 01:28:16

acpi-cpufreq is the correct, NOT acpi-cpufreqd.

TigTex · 2010-06-24 01:28:33

Sorry, gave you the wrong modprobe... you already made it well...

Did you try everything that is at the wiki? http://wiki.archlinux.org/index.php/Cpufreq

ps: i was already writing this post, noticed my mistake

Try to enable testing repo

Do pacman -Syu

pacman -S cpufrequtils
reboot
modprobe acpi-cpufreq

I dont see why it doesn't work...

Last edited by TigTex (2010-06-24 01:31:38)

deukalion · 2010-06-24 01:31:12

All I did was follow the wiki, add ondemand (since it had performance first) didn't need to change it back. Performance gave the same cpufreq-info results.

TigTex · 2010-06-24 01:39:24

Well... you may try to reset your bios. Then confirm that C1E stepping or speedstep or eist or whatever, are enabled in bios. Because if you disable that options the module will fail to load, it can't find the cpu capability to throttle down.

Other thing. When your pc powers up for 1-2 seconds, powers down and powers up again usualy it shows a message like "overclocking failed". If you have everything fine and your pc keeps doing that, maybe you have an hardware problem.

OUTSIDE WORLD ALERT: Do you have windows on that? How does it work? (check windows software cpu-z and see the cpu frequency and memory speed and timings)

Last edited by TigTex (2010-06-24 01:51:05)

flamelab · 2010-06-24 01:43:15

Except for that, Core i5/i7 and older Core cpus (and AMD ones) don't need Cpufreq in order to powersave. BIOS and kernel follow an "ondemand" way of handling the CPU anyway.

deukalion · 2010-06-24 01:52:23

CPU-z:

CPU:
Core Speed: ~1440mhz
Multiplier: x9.0
BUS Speed: 160.0MHz
QPI LINK: ~2880MHz

(in BIOS it says about 5500 on QPI)

DRAM Frequency: 800mhz
FSB:DRAM: 2:10

I've set it to 1600mhz.

TigTex · 2010-06-26 23:17:56

dram frequency: 800mhz is correct. it's dual density ram 3 (ddr3) so it's 800x2 = 1600mhz. If you set 1600... it will be 1600x2=3200mhz on your poor rams and the boot failure.

Without cpufreq cpu's only enter in lower C states. You can have more powersaving with cpufreq unless you have a core 2 T9000 or better (65nm mobile cpu). Just try a "superpi" test or something similar and see numbers. Windows is doing the cpu throttling stuff just fine, linux isn't, but if everything is working has it should, super pi will have the same score in both OS's

Last edited by TigTex (2010-06-26 23:19:28)

Arch Linux

#1 2010-06-22 15:40:33

Core i5-750 support with cpufreq?

#2 2010-06-22 16:38:54

Re: Core i5-750 support with cpufreq?

#3 2010-06-22 19:39:21

Re: Core i5-750 support with cpufreq?

#4 2010-06-23 09:07:56

Re: Core i5-750 support with cpufreq?

#5 2010-06-23 10:44:14

Re: Core i5-750 support with cpufreq?

#6 2010-06-24 00:28:49

Re: Core i5-750 support with cpufreq?

#7 2010-06-24 00:31:48

Re: Core i5-750 support with cpufreq?

#8 2010-06-24 01:07:30

Re: Core i5-750 support with cpufreq?

#9 2010-06-24 01:09:50

Re: Core i5-750 support with cpufreq?

#10 2010-06-24 01:14:21

Re: Core i5-750 support with cpufreq?

#11 2010-06-24 01:16:02

Re: Core i5-750 support with cpufreq?

#12 2010-06-24 01:17:17

Re: Core i5-750 support with cpufreq?

#13 2010-06-24 01:20:26

Re: Core i5-750 support with cpufreq?

#14 2010-06-24 01:20:59

Re: Core i5-750 support with cpufreq?

#15 2010-06-24 01:22:21

Re: Core i5-750 support with cpufreq?

#16 2010-06-24 01:22:46

Re: Core i5-750 support with cpufreq?

#17 2010-06-24 01:25:39

Re: Core i5-750 support with cpufreq?

#18 2010-06-24 01:27:30

Re: Core i5-750 support with cpufreq?

#19 2010-06-24 01:28:16

Re: Core i5-750 support with cpufreq?

#20 2010-06-24 01:28:33

Re: Core i5-750 support with cpufreq?

#21 2010-06-24 01:31:12

Re: Core i5-750 support with cpufreq?

#22 2010-06-24 01:39:24

Re: Core i5-750 support with cpufreq?

#23 2010-06-24 01:43:15

Re: Core i5-750 support with cpufreq?

#24 2010-06-24 01:52:23

Re: Core i5-750 support with cpufreq?

#25 2010-06-26 23:17:56

Re: Core i5-750 support with cpufreq?

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