AMD Turion X2 TL-56 undervolt

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Joined: Fri 16. Jan 2009, 18:07

AMD Turion X2 TL-56 undervolt

Post by Roby86 » Fri 16. Jan 2009, 18:21

Yo! 8-)

Here is my question. My processor is AMD Turion X2 TL-56, so I was glad when I saw it is recently supported by PHC, so I can use it in Ubuntu. I've installed it and tried PHCTool, but unfortunately on vcc calculation it says CPU not recognized - calculation not available, also the throttling is not working. Here is what I'm trying to do :

Max. Performance(on AC Power) : 1800 MHz
Voltage : 0.900 V
Max. Battery(on battery) : 800 MHz
Voltage : 0.6875 - 0.700 V

On this settings, laptop generate less heat, and these are the optimal voltages that can get from this AMD processor in Win XP.

I've done it in Win XP with RMClock 2.35, and it works great.

Some info :

cat /sys/devices/system/cpu/cpu0/cpufreq/phc_controls

10:19 8:20 0:30

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

1800000 1600000 800000

cat /proc/acpi/processor/CPU0/throttling

state count: 8
active state: T0
state available: T0 to T7
*T0: 100%
T1: 87%
T2: 75%
T3: 62%
T4: 50%
T5: 37%
T6: 25%
T7: 12%

cat /proc/acpi/processor/CPU1/throttling

<not supported>

P.S. What is the best tool to read temperatures in Ubuntu?

Thanks for help! ;)

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Posts: 180
Joined: Fri 18. Jul 2008, 11:25

Re: AMD Turion X2 TL-56 undervolt

Post by DavidG » Fri 16. Jan 2009, 18:52

The PHCTool is not yet modified to support the AMD driver. You can undervolt manually by writing to phc_controls, e.g.:

Code: Select all

echo "10:21 8:24 0:32"|sudo tee /sys/devices/system/cpu/cpu0/cpufreq/phc_controls
A bank is a place where they lend you an umbrella in fair weather and ask for it back when it begins to rain -- R. Frost

Posts: 346
Joined: Wed 9. Jul 2008, 19:57

Re: AMD Turion X2 TL-56 undervolt

Post by the-fallen » Sat 17. Jan 2009, 09:28

I am working on PHCTool 2. This is going to support the AMD Processors as well as the Intel ones.

I just need some time :) Excuse me.

Posts: 7
Joined: Wed 5. Aug 2009, 20:49

Re: AMD Turion X2 TL-56 undervolt

Post by jasmine » Fri 7. Aug 2009, 21:39

I just posted up a patch (to PHCTool-0.5.2-2) a few minutes ago to do just that :D


Should work for you without any further modifications, and it won't let you "overvolt" accidently :)

For monitoring temperatures, I use sensors-applet 2.2.1 in Gnome (make sure your k8temp module is loaded too)

Code: Select all

modprobe k8temp
sudo apt-get install sensors-applet libsensors4

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