Howto: Dynamic CPU speed with Athlon XP and nForce2 boards

[micmac]

Hi Hasw!

I used min_fsb=60 and 1,1V (1100). In fact I only used this pair and the default (aka full speed). The problem is not running these speeds. prime95 didn't see any errors for 2 hours while running 60/1100. But changing between them often made the box hang. Afterwards my xfs filesystems needed to be repaired.

I'm not sure if I dare to take the risk again

Greets

micmac

[Hasw]

You should use some steps between the changes 60@1100->Fullspeed and backwards. I think that's maybe a little bit too much After all these functions are experimental and may not work on all systems perfect. If somebody isn't sure if it works, he should not try it on a important system without backup.

[dob]

What cpufreq daemon do you guys use?
I use powernowd which is fine and easy to set up; but I only change the FSB and not the voltage

[energy]

I just set up my box to use cpufreq scaling... Now my XP2200+ (1,8GHz) is running at 1,3GHz
The FSB range that works for me is 95-133MHz (my cpu is 133MHz FSB model) I can go even
below 1,3GHz and it works perfectly, BUT it hangs immediately after I try to raise it up again...
So I can go way down but never get back up

Oh, the motherboard is Asus A7N8X.

EDIT: Did some tweaking, now running 12x150MHz. So now I can scale down to 1,14GHz without
any problems. Solid as a rock @ full speed and 1,14GHz

[KpR2000]

I am using 2.6.11-nitro0 and the patch atxp-1.0.3 patch applied correctly.
But I have problems to compile the kernel:

Following error occured at atxpl_detect function:

[PrakashP]

Yes, put /* */ around the offending line.

[hothead]

@Hasw

You wrote that VCore changing is supported on
Leadtek K7NCR-18D. I've a K7NCR-18D Pro but when I load the
atxp1 module I do not get any kernel message. I looked at the board and
I cannot find a chip named atxp1. How do you switch the VCore here?

Regards

Ruben
_________________
Got a question? - http://justfuckinggoogleit.com/

[chx1975]

Motherboard is 8RDA+, CPU is a Mobile Barton 2500+.

Sensors says I have "Vcore 1" which is 1.7V and "Vcore 2" which is 1.25 -- I have echo 1250 >/sys/bus/i2c/devices/0-0037/cpu_vid so 1.25 is fine, it's great. But what's that alarmingly high 1.7V?

Anyone has a working sensors file for this MB?

[woZa]

[chx1975]

[woZa]

[dob]

Can the 'ondemand' cpufreq governor be used with an nforce2 board?

The ondemand governor looks interesting because it will automatically adjust the cpu speed based on cpu usage, without having to use a userspace daemon like cpufreqd / speedfreqd etc.

In theory, this is how you proceed:
1) Check that the on demand governor is available (it is!)

[hothead]

Is nobody there who knows how to change the VCore on a Leadtek K7NCR18D?
_________________
Got a question? - http://justfuckinggoogleit.com/

[mikeraach]

I have a NF7-S v2 and all modules compiled/installed.

I have my rig overclocked to 10x230, so I set my min fsb to 180. Prime95 fails after a few minutes and I often get programs crashing.

I reboot, then try min fsb to 200 and get same results as above...min 220, same.
This is with a completely stable 230fsb setup (prime95 too).

I tried flashing to a different bios, no change, and I tried setting my chip to default 11x166 (xp2500). Setting min fsb to anything resulted in a instability problem as well.

Thinking this was maybe a problem with the way linux handles changing fsb with my board, I tried 8rdavcore and have the same problems as listed above.

HOWEVER, I have used 8rdavcore to RAISE the fsb and had no problems. It seems like my board just doesn't like lowering the fsb from stock. Is there a way that I can overclock instead of underclock with the cpufreq-nforce2 driver?

[Hasw]

@hothead: Sorry, the ATXP1 module doesn't support the K7NCR18D, this was a wrong entry (or they have different revisions, don't know yet). However the nforce2-smi module will support it.

@dob: Ondemand is not yet supported.

@mikeraach: I'll add a module patch to set the maximum FSB via module option (as initially, but it was removed).


Alexej has written a Python-script to change FSB and voltage on demand: http://www.lextech.net/work/autoFreq/

[bgradid]

I've followed the directions to the letter, but, I'm not having any luck changing the frequency, I run this

[Hasw]

What are scaling_max_freq and scaling_min_freq saying? If you not have overclocked your CPU you will not get more than 1470 MHz, because this is the frequency of a 1700+.

[michael3]

hello

I got an error Message:
-bash: /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed: Keine Berechtigung (no permission)

Yes, I have executed it as root.
I've got an Asus A78X-E Board with Nforce 2. The FSB and the Volt are displayed without problems.

ls /sys/devices/system/cpu/cpu0/cpufreq
affected_cpus cpuinfo_max_freq scaling_available_governors scaling_driver scaling_max_freq
cpuinfo_cur_freq cpuinfo_min_freq scaling_cur_freq scaling_governor scaling_min_freq

Thank you!

[Hasw]

Have you checked the file permissions?

[michael3]

Hello

I don't have the File
"-rw-r--r-- 1 root root 0 Mar 26 14:56 scaling_setspeed".
The File is missing.The other file permissions are correct. I have only 10 Files and you have got 11 Files.

[bgradid]

[Hasw]

[Hasw]

[bgradid]

no luck so far I tried overclocking it in the bios a bit to see if it needed to be 'nudged'

[Hasw]

Can you please run