#6 ISSUE: Can't change frequency, SetFSB error: No such device or address

[Lance]

Hi,

I so want to overclock without having to load up a Windows OS. However I'm getting the following error:

lance@lance-AcerOne:~$ sudo lfsb slg8sp513 140
CPU governor 'performance' set.

CPU frequency : 1596.10 MHz (estimated)
PLL slg8sp513 is supported (tested)

Changing to:
FSB=140 MHz, PCI=35.00 MHz
WARNING: Too high FSB/PCI/AGP speed can DAMAGE your hardware!
Continue [y/N]: y
Can't change frequency, SetFSB error: No such device or address

CPU frequency : 1596.02 MHz (estimated)
FSB=140 MHz, PCI=35.00 MHz

CPU governor 'ondemand' set.
lance@lance-AcerOne:~$

I'm trying this on my Acer Aspire One ZG5/AOA-150 running Ubuntu 13.04 32bit. I know this can be overclocked after a resitor mod along with using SetFSB and PLL slg8sp513 on Windows XP and 7. Documented here: http://www.laptop-forums.com/threads/overclocking-zg5-not-easy-but-works.14735/ But I cannot figure out why not on Ubuntu using your tool. Please help.

[Walter Rudametkin]

I have the exact same problem, with the same machine and same Atom N270 1.6ghz processor.

lspci | grep -i smbus
00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02)

Here's the output of i2cdetect:

$i2cdetect -l 
i2c-0   i2c             i915 gmbus ssc                          I2C adapter
i2c-1   i2c             i915 gmbus vga                          I2C adapter
i2c-2   i2c             i915 gmbus panel                        I2C adapter
i2c-3   i2c             i915 gmbus dpc                          I2C adapter
i2c-4   i2c             i915 gmbus dpb                          I2C adapter
i2c-5   i2c             i915 gmbus dpd                          I2C adapter

And, if I try to change the FSB I get the same error as Lance, except if I try it with '-d 4'.

$lfsb slg8sp513 144 -d 4
CPU governor 'performance' set.

CPU frequency : 1596.19 MHz (estimated)
PLL slg8sp513 is supported (tested)
FSB=266 MHz, PCI=33.30 MHz

Changing to:
FSB=144 MHz, PCI=36.00 MHz
WARNING: Too high FSB/PCI/AGP speed can DAMAGE your hardware!
Continue [y/N]: y
Can't change frequency, SetFSB error: Success

CPU frequency : 1596.02 MHz (estimated)
FSB=144 MHz, PCI=36.00 MHz

CPU governor 'ondemand' set.

The weird thing is you can see the line "SetFSB error: Success".

I'm willing to experiment at length. What else should I do?

[Andrey Zhornyak]

Rebuild lfsb with debug option and show output again.
Are you sure that you have exactly slg8sp513? Maybe your laptop is equipped with a cv PLL series.
Check wiki, particularly https://sourceforge.net/p/lfsb/wiki/i2c-SMbus%20availability/