Acer Aspire TimelineX 3820TG mods/tweaks ONLY!

merlinvs · Oct 9, 2011

Hey,
thanks for all the info about this great notebook.
When I read about that backlit Keyboard I ordered one in that same moment, and while looking for a USB port I took a closer look on that free CCD connector.
Unfortunately it seems that it isn't connected to anything usb like.
There is no power on the power pin,
When trying using power from a different usb port and only data lines from CCD, no data connection happens. Then I checked all the free resistor / capacitor pads in the area for a connection to that port -> nothing.

So, I couldn't get a usb connection on that port!

kubco2 · Oct 11, 2011

prikolchik:
Did you manage to make some fix for flickering screen, in your bios? I think on linux it is very noticable even on 10% brightness ... When I decreased it(with acpicall) to 5% it was terrible... I dont know why, but in Windows it is quite well on 10%

Just_a_Nick · Oct 11, 2011

kubco2 said: ↑

prikolchik:
Did you manage to make some fix for flickering screen, in your bios? I think on linux it is very noticable even on 10% brightness ... When I decreased it(with acpicall) to 5% it was terrible... I dont know why, but in Windows it is quite well on 10%
Click to expand...

It seems to be the power save function of the intel chipset graphic under linux.

If I use the AMD card, I have never notice this problem.

kubco2 · Oct 11, 2011

Im running intel-only .... Ok i can try ATI and turn intel on max performance. thx for tip

Maurik · Oct 11, 2011

Any way to turn the line-in port into a line out?

Or to have sound come out of both the speakers and headphone slot - i.e. having Windows recognise them as two separate lines?

I know this was possible with my old laptop's 5.1 card. Is the TOSLINK the only way to get surround sound on this one?

Jitamaro · Oct 15, 2011

prikolchik said: ↑
Using Embedded Controller (EC) to control your laptop's hardware. (by prikolchik)

By following any instructions in this article you relieve the author of any liability resulting from your actions. In other words: if you break your computer -- then it is your problem!

EVEN THOUGH THE CHANCE IS SMALL, IT IS POSSIBLE TO PERMANENTLY DAMAGE YOUR HARDWARE BY MAKING CHANGES TO EMBEDDED CONTROLLER (EC). DO NOT CONTINUE IF YOU DO NOT ACCEPT THE RISKS!

Preface
When author of this article was looking for a way to control fan speed on Acer TimelineX Aspire 3820T/3820TG/3820TZ/3820TGZ, he could not find any guides, instructions or easy-to-use tools that would aid him in his search. It took a lot of research, guesses, God's help and sheer luck for the author to succeed in his noble task. This article was written, because the author decided to share his findings with the rest of the world in hopes that it will aid others in tweaking their hardware in the way their heart desires.

Throughout the article, the author refers to his laptop Acer Aspire 3820TG to provide real world examples.

To have a deeper understanding of the article, the reader should be familiar with: 1) bits 2) bytes 3) binary numerical system 4) hexadecimal numerical system 5) general computer programming terms. This information can be found on Wikipedia.

Please note: the information presented in this article was not properly researched and the reader should be aware that the author could be unintentionally providing false or outdated information. If you notice an error or have a suggestion, please contact the author (prikolchik) via Private Message on forum.notebookreview.com or leave a reply in this thread.

Intro
Laptops use Embedded Controller (EC) to control the battery charging operation and perform other tasks associated with starting and stopping the laptop. EC stores the current state of devices (should WiFi be on?), current information about the system (temperature, fan speed), control battery state (should the battery be charging?) and so on. ACPI directly communicates with EC and writes changes depending on the event that took place. For example, you press a hotkey to increase brightness and ACPI reacts to that hotkey. It increases the brightness, by doing calculations and writing changes to EC. After writing to EC, the brightness changes either on hardware level or via device drivers, that themselves read the values from EC and talk to other hardware to change the brightness level.

Typically, what is referred to Embedded Controller is a micro-controller that has 256 (0x00-0xFF in hexadecimal) user-accessible bytes. Most of those bytes have a meaning and are responsible for controlling the hardware or providing information. For example, on 3820TG the byte at [0x93] stores the state of the CPU fan and byte at [0x94] stores the fan speed.

In nutshell, Embedded Controller stores 256 numbers, and by reading and writing to EC, we can get information about the system and make changes to the state of computer hardware (such as fan control).

Why would you want to read and write to Embedded Controller (EC)?
The simple answer is: because you can! Writing to EC allows you to control hardware that cannot be controlled by other means in the way you want. For example, you can manually turn on/off WiFi, change brightness to "unsupported" levels, change fan speed or completely turn off the fan; all without using any special drivers or programs (apart from whatever you use to make changes to EC).

For example, someone figures out how to control the fan and shares his findings, then a programmer writes a small utility to control the fan by reading and writing to EC. This program is then published on the Web and ordinary users can install and use this program to control the fan on their computers. There are many examples of such programs. Some of them are: tpfancontrol (Windows), 1810tray (Windows), a1ctl (Windows), acerhdf (Linux), acerfand (Linux). It is not uncommon for programmers to take existing fan control tools and port them to another system, or edit them to enable fan control on their hardware. If you plan on developing your own tool, then I highly suggest reusing existing solutions and if you end up writing your own tool, then make the source code available for others to modify.

It is very important to note that it is rare to find two laptops that use Embedded Controller in the same way. So don't be surprised if changing some value in EC works on one laptop, but doesn't work on yours.

How can you read and write to the Embedded Controller (EC)?
There are many tools you can use to read and write to EC. On Windows, a popular tool is RWEverything and on Linux one of the tools is acer_ec.pl (a simple Perl script, that is considered unsafe and the use of it is depreciated). There may be other tools for both Windows and Linux, but the author did not look for any alternatives as both of those two tools worked well on his computer.

Here is an example of Embedded Controller (EC) dump made with acer_ec.pl on Acer Aspire 3820TG (output format is changed from the original by author):
Code:
prikolchik@as3820tg:~$ sudo perl acer_ec.pl regs
# note that "00" was replaced with "--" for readability

      00  01  02  03  04  05  06  07  |  08  09  0A  0B  0C  0D  0E  0F
      __  __  __  __  __  __  __  __  |  __  __  __  __  __  __  __  __
00 |  --  20  --  --  --  32  2C  AF  |  06  --  44  14  --  --  --  30  
10 |  03  --  03  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
20 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
30 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
40 |  --  --  --  --  --  --  --  --  |  --  0A  --  F4  02  --  --  01  
50 |  10  01  03  --  --  01  81  --  |  --  --  --  --  40  --  --  --  
60 |  80  80  80  --  --  --  --  --  |  1A  --  --  --  --  --  --  --  
70 |  62  01  04  --  88  71  --  --  |  08  01  --  --  --  --  --  09  
80 |  81  07  09  --  17  --  --  17  |  A9  --  --  06  --  --  --  --  
90 |  --  --  --  04  FF  FF  04  FF  |  FF  B2  --  --  --  --  03  0B  
A0 |  80  80  80  80  80  80  80  80  |  2B  1D  25  25  31  3B  05  --  
B0 |  80  80  80  --  --  --  --  --  |  1A  --  --  --  --  --  01  --  
C0 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
D0 |  62  67  57  5C  --  --  --  69  |  --  --  --  --  32  --  --  --  
E0 |  54  16  54  16  64  --  --  --  |  EA  32  01  60  --  --  B8  0B  
F0 |  30  57  2E  30  37  41  43  2E  |  30  31  2E  31  35  20  --  --  
An example of EC dump with RWEverything:

So how do you figure out what the values in EC stand for?
Before you start figuring out what you can do with EC on your machine, you should first spend the time and search the web to make sure there is no existing solution to your problem. Take your time, download the BIOS for your laptop and examine the README files to see what models your BIOS is compatible with. For example, you might not be able to find any information on fan control on Acer Aspire TimelineX 1410T, but after examining the README file included in the downloaded BIOS update you realise that 1410T BIOS works with 1810T/1810TZ. So you search for tweaks on 1810T, and find that there is an existing fan control tool that works with your 1410T laptop.

Another good idea would be to search for all models from your laptop manufacturer and see if any existing tools or EC methods work on your model. For example, controls in EC on Acer 3820TG are somewhat similar to Acer Extensa 5220. It could significantly narrow down your search if you know approximately what you are looking for and how it could look like. This will significantly cut down on the time it takes you to find what you are looking for.

If you can't find any existing solutions, then you could try figuring it out on your own. How? To tell you the truth, most of it are lucky guesses, a bit of experimentation and by making changes to the state of the computer hardware (such as using CPU intensive programs to make the fan turn on, or turning WiFi on/off) and observing what changes in EC as a result. For example, you notice that in byte located at [0x72] bit 1 changed from 1 to 0 when WiFi is turned off via a hotkey. You can then try changing [0x72] bit 1 back to 1 to see if that turns the WiFi back on.

You should be careful and have some sort of a system to make sure you don't check the same byte twice. You can make changes to EC and see if anything changed in your system as a result. You CANNOT just blindly write EVERYWHERE in EC (this will be your last option if everything else fails), as some bytes/bits are indicators (such as temperature), some are recomputed every few milliseconds, so changing them will not lead to any result and the value will revert back and some bytes are "high importance" and changing them can lead to emergency shut down of your computer. For simplicity, if the byte you change changes itself back to the original value, then you can think of it as "read-only" byte. For example, on 3820TG when CapsLock is on, a value at [0x0C] bit 2 indicates whether CapsLock (itself or LED) is on or not. Changing this value will make no difference in the system, and bit will revert back to its old value automatically.

Another more "scientific" approach is to examine the code that writes to EC. An example of such code would be Advanced Configuration and Power Interface (ACPI), which mostly consists of SSDT and DSDT (differentiated system description table). SSDT and DSDT tables are part of the computer's BIOS. SSDT/DSDT tables can be extracted by various tools, such as RWEverything (Windows) and acpi_dump (or simply by "cat /proc/acpi/tables/dsdt > somefile.aml") on Linux. The extracted table is in compiled AML byte code, and will need to be decompiled to get the original source code. The tool that can disassemble AML byte code into ASL source code is iASL. iASL is an abbreviation for "Intel ASL compiler/decompiler" and is a fully-featured translator for the ACPI Source Language (ASL) and ACPI binary data tables (more info). There are versions both for Linux (can use package manager to install) and Windows. It can be downloaded from here.

Once you extract SSDT and DSDT tables and disassemble them into ASL source code, you can open the source code files with any text editor. It can be very difficult to understand at first, but google can be of great help, and fortunately, there is an excellent ACPI Specification paper, that describes both ACPI specifications and ASL language. One of the easiest ways to understand the soure code is to pay very close attention to the description of reserved methods in the ACPI specification paper and pay close attention to variable names, which may give clues as to what they mean. For example, WLEN could stand for "WireLess ENable" and store the status of the WiFi (whether it is enabled or not).

If you are looking for controlling the fan, then try looking for "FAN". You might be able to find the fan control methods, or something that would give you a clue on what to look for in EC.

If you feel like you can start looking for some real stuff, then search for "EmbeddedController" in SSDT/DSDT source files. Here is an example from DSDT table of Acer Aspire 3820TG (My comments are after //):
Code:
OperationRegion (RAM, EmbeddedControl, Zero, 0xFF) 
Field (RAM, ByteAcc, Lock, Preserve)
{
            Offset (0x0A), 
        ,   1,                // [0x0A] bit 0
    BLNK,   1,                // [0x0A] bit 1, makes System Power LED blink
    WLLD,   2,                // [0x0A] bit 2 & 3, status of the Wireless LED
    BTLD,   2,                // [0x0A] bit 4 & 5, status of the Bluetooth LED
            Offset (0x13), 
    URTB,   8,                // [0x0A] all bits
    //.... skipped lines
            Offset (0x71), 
    WLEN,   1,                //[0x71] bit 0, controls the status of Wireless 
    BTEN,   1,                //[0x71] bit 1, controls the status of Bluetooth
    //... skipped lines
            Offset (0x73), 
    WWEN,   1,                //[0x73] bit 0, controls the status of 3G card
            Offset (0x75), 
    SWBL,   1,  
    KLMA,   1,  
            Offset (0x76), 
    SYSC,   4,  
    SYSO,   4,  
            Offset (0xBA), 
    VTMP,   8                //[0xBA] all bits, just a video card temp variable?
}
As you can see, you can already start figuring something out just by looking at the variable names (WLEN, BTEN, etc). If you want to find out what information those variables store, then search for their name in the file and examine the code. This way you can approximately guess what each of the variables store. For example, one variable might be storing just a temporary number that is used in calculation (rare, but it is possible). As you are figuring out what the variables mean, you can look at your EC and if something interests you, then try changing it to see what happens.

You should also search in the file for more "EmbeddedController" and for the actual name that is assigned to OperatingRegion with EmbeddedController (the name is "RAM" in this case).

When you start figuring out what these variables mean, it would be a good idea to create a table (on paper, or speadsheet) the same size as EC table (16 by 16) and cross out the regions that do not interest you. For example, if you are looking for fan control, then you don't care about the variables that you know store battery charge information.

Once you examined SSDT and DSDT tables and harvested as much information about what is stored in EC as you possibly could, then it is time to observe, change and experiment by making changes to EC.

Here is how I figured it out how to control the fan on 3820TG:
1) Look online for existing solution for my model. Nothing was found.
2) Download BIOS and check what models it is compatible with, then search for tweaks for those models. Nothing.
3) Search for guides and information about how to control the fan on other Acer laptops. Found a few very brief remarks and incomplete guides. Gave me a general direction to go to. Looked at source code for fan control tools to see what bytes in EC were responsible for fan control on other models.
4) Examined DSDT & SSDT tables and created a list and a table of bytes in EC that I knew were not responsible for the fan control. Couldn't find any fan control information in DSDT.
5) Observed RWEverything and ran some programs to make the fan speed change to cool down the CPU. I noted bytes stored at [0x94] (default 0xFF) and [0x95] (default 0xFF) change ONLY when the fan is running. I remembered reading that in every fan control example I read about, there was a byte that controlled whether the fan was on Auto or in Manual mode. So I changed byte at [0x93] (original value was 0x04) to some random value, simply because it was the closest one and it seemed logical. The value I entered was something like 0xBF, and I noticed that it automatically changed to another value, 0x14, and then both [0x94] and [0x95] changed to 0xB0 and 0xAF respectively, and the fan started running! That was a success! At first, I thought [0x94] and [0x95] both were telling me what the speed of the fan is, so I started looking for a byte that lets me change the fan speed. I couldn't find anything, so I simply went on google and typed "0x93 0x94 0x95 fan" and I ended up on some German forum, where one user was describing the fan control he found on Acer Extensa 5220. He was saying that [0x93] = fan mode (0x04=auto, 0x14=manual), [0x94] desired fan speed (0x00-0xFF, where 0x00 max and 0xFF minimum) and [0x95] actual fan speed (0x00-0xFF, where 0x00 max and 0xFF minimum). Once i read that, i changed [0x93] to 0x14, and set [0x94] to 0x00. My CPU fan turned on and it was clearly spinning on the max speed! I then changed [0x93] to 0x04 to put CPU fan back into automatic mode.
6) Because on 3820TG you have two fans, one for CPU and one for GPU, I also wanted to figure out how to control the GPU fan. So, knowing how to control CPU fan, I looked for the similar 3 bytes. And I found them right after the CPU fan control bytes. GPU fan control bytes were: [0x96] (fan mode) [0x97] (desired fan speed] and [0x98] (actual fan speed).
7) Played around by changing values and trying to control both CPU and GPU fan. It was a success!

How I found out how to disable/enable WiFi in EC on 3820TG:
1) Started RWEverything and looked at observed the values. Noticed ones that change repeatedly (probably temperature monitoring, battery charge level, some temp variables, etc) and was ignoring them.
2) Kept disabling and enabling WiFi with different time periods to see what changed in EC as a result.
3) Noticed that [0x71] bit 0 was changing from 0 to 1 and from 1 to 0. So I changed the value by hand and noticed that it turns on/off my WiFi card. Success!

Wrap up
So that is how you can find how to control the hardware of your laptop via EC. Now you can explore and find a way to control YOUR computer! Just remember the main points:
1. Research, research, research and research.
2. Don't blindly change things. Look for how it worked in other laptops.
3. Take your time, do not give up.

Good luck!

Acer Aspire TimelineX 3820T/3820TG/3820TZ/3820TGZ Fan control and other Embedded Controller (EC) tweaks (by prikolchik)

Here is the list of what we can control with Embedded Controller (EC) on Acer Aspire TimelineX 3820T/3820TG/3820TZ/3820TGZ.

To apply these tweaks:

- Windows. Use a program called RWEverything (download here). Once installed, launch it at the top you will find many buttons. Find one that says "EC" (or "Embedded Controller" if you hover your mouse over it) and click on it. You will see this:

- Linux. I suggest using RWEverything on Windows, because it is much more convenient, but if you are too hardcore Linux then you can use acer_ec.pl (a simple command-line Perl script. It is considered unsafe and the use of it is depreciated). It worked fine on 3820TG, but there is no guarantee it works on other laptops. Here is an example of output:
Code:
prikolchik@as3820tg:~$ sudo perl acer_ec.pl regs
# note that "00" was replaced with "--" for readability

      00  01  02  03  04  05  06  07  |  08  09  0A  0B  0C  0D  0E  0F
      __  __  __  __  __  __  __  __  |  __  __  __  __  __  __  __  __
00 |  --  20  --  --  --  32  2C  AF  |  06  --  44  14  --  --  --  30  
10 |  03  --  03  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
20 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
30 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
40 |  --  --  --  --  --  --  --  --  |  --  0A  --  F4  02  --  --  01  
50 |  10  01  03  --  --  01  81  --  |  --  --  --  --  40  --  --  --  
60 |  80  80  80  --  --  --  --  --  |  1A  --  --  --  --  --  --  --  
70 |  62  01  04  --  88  71  --  --  |  08  01  --  --  --  --  --  09  
80 |  81  07  09  --  17  --  --  17  |  A9  --  --  06  --  --  --  --  
90 |  --  --  --  04  FF  FF  04  FF  |  FF  B2  --  --  --  --  03  0B  
A0 |  80  80  80  80  80  80  80  80  |  2B  1D  25  25  31  3B  05  --  
B0 |  80  80  80  --  --  --  --  --  |  1A  --  --  --  --  --  01  --  
C0 |  --  --  --  --  --  --  --  --  |  --  --  --  --  --  --  --  --  
D0 |  62  67  57  5C  --  --  --  69  |  --  --  --  --  32  --  --  --  
E0 |  54  16  54  16  64  --  --  --  |  EA  32  01  60  --  --  B8  0B  
F0 |  30  57  2E  30  37  41  43  2E  |  30  31  2E  31  35  20  --  --  
Those two tables above show what is stored in the Embedded Controller (EC) memory on your laptop. It is possible to get some information from these values (such as status of LEDs, CPU temperature, Fan speed) and change some of it.

All the numbers that you see in this window are in hexadecimal. If you don't know what that is, take the time to look it up. Also read about binary numbers, understand what bits are, etc.

The addresses in EC range from 0x00 to 0xFF. 16 numbers per row and 16 numbers per column. The way you tweak or read information is: find a place the in memory that interests you and read or change its value.

------------- Fan control: ----------------
[0x93] - CPU fan: Fan mode. 0x04 Auto, 0x14 Manual
[0x94] - CPU fan: Desired fan speed. 0x00-0xFF. With 0x00 being max speed and 0xFF means fan is off
[0x95] - CPU fan: Actual fan speed (in %? See note below).

[0x96] - GPU fan: Fan mode. 0x04 Auto, 0x14 Manual
[0x97] - GPU fan: Desired fan speed. 0x00-0xFF. With 0x00 being max speed and 0xFF means fan is off
[0x98] - GPU fan: Actual fan speed (in %? See note below).

To test: Open RWEverything, click on Embedded Controller (EC), go to [0x93] and change it to 0x14. Then change [0x94] to 0x00. This will set CPU fan speed to maximum! Sounds like an airplane, doesn't it?
--
If [0x93]/[0x96] fan mode is set to Automatic (0x04), then changing [0x94]/[0x97] will not work. It will simply revert back to the old value.
--
If CPU fan is set to max speed (0x00) in [0x94] then the maximum fan speed it reaches is 0x60 in [0x95].
If GPU fan is set to max speed (0x00) in [0x97] then the maximum fan speed it reaches is 0x45 in [0x98].
--
Fan speed steps and corresponding temperature in Celsius that triggers the change. (Looked at changes in EC [0x94] and [0x97] and at temps in HWMonitor to figure this out):

CPU Fan speed : 0xFF 0xD0 0xB6 0x9E 0x81 ....
CPU Temperature: <? ? ? ? ? ?

GPU fan speed : 0xFF ...
GPU Temprature : <?
--
NOTE on fan speed:
The formula for calculating the actual fan speed in RPM is not yet known. I did find fan speed formulas for other Acer laptops (examined DSDT tables). There are no FAN tables or methods in 3820 DSDT, so we will have to figure out the fan speed formula ourselves. The formulas I found were:
1) ((~VAL) & 0xFF) * 10. OR in other words: ( NOT(VAL) AND 0xFF) * 10
2) 0x78000 / VAL
3) 1350000 / 8 / VAL
4) 1350000 / 4 / VAL

Where VAL is the fan speed value from [0x94],[0x95],[0x97],[0x98].

As far as I know, the only way we can find the true fan speed formula is to either measure the actual fan speed, or look up the data sheet for the fans and find the maximum (and minimum?) RPM speed. Then use those max/min values to find the formula, knowing that CPU can only go as high as 0x60 in [0x94], etc.

I did some research, but I couldn't find any fan speed information apart from manufacturer and part number. Perhaps, we should email the fan manufacturer and ask for fan speeds?
My computer:
CPU fan: ADDA AB7505HX-R0B DC5V 0.20A (JM31) image
GPU fan: ADDA AB5505HX-Q0B DC5V 0.20A (JM31) image

Found on net:
CPU fan: SUNON Model: MG057PFV1-A P/N: MG50060V1-B000-S99 image
GPU fan: -Manufacturer- -Part number-

--
Information missing: (please help out!)
1. Need to know max/min RPM of CPU and GPU fans for fan speed calculation.
2. Need a screenshot of RWEverything EC window on 3820T. This model doesn't have GPU fan, so we need to see how EC reflects that.
3. Need CPU/GPU fan speed steps that are there in Automatic mode (0x04). Also temperature in Celsius that triggers each change. Please include your BIOS version.

----------------------------------------------------

RO - means read-only.
SC - means sensor, changes dynamically.

------------- Misc: ----------------

[0x77] - RO? - Fn key: If Fn key is pressed, it is equal to 0x04, otherwise 0x00. Maybe signals other keys too? It could be keyboard controller and we can send key signals to it?
[0x87] - RO - Backlight/brightness level: From 0x00 (backlight off) to 0x64 (backlight 100%). This is a read-only copy of [0x84].
------------------------------------------------------------------

------------- LEDs: ----------------
[0x0A] bit 1 - Power LED: if on(1) it will blink orange.
[0x0C] bit 2 - RO - CapsLock (LED?): If CapsLock key is on, bit is set. (0x04)
[0x0C] bit 4 - RO - NumLock (LED?) : If NumLock is on, bit is set. (0x10)
[0x51] bit 0 - LED next to P button: on(1)/off(0).

------------------------------------------------------

------------- Devices: ----------------
[0x0B] bit 0 - RO - Touchpad: Indicates whether touchpad is enabled (bit set 0x01) or disabled (bit unset 0x00).
[0x71] bit 0 - WiFi status: On(1) or Off(0).
[0x71] bit 1 - Bluetooth status: On(1) or Off(0).
[0x73] bit 0 - WiFi LED or 3G status(?).

---------------------------------------------------------

------------- Sensors: ----------------
[0xA8] - TZS0 in CPUID Hardware Monitor
[0xA9] - TSZ1 in CPUID Hardware Monitor
---------------------------------------------------------

More info to come!
Click to expand...
Hi prikolchik,

Sorry about the full quote, but I didn't read the full thread but I can now play some decent games or compile Linux with the full cpu speed without this thermal shutdowns!!! I've found this information very valuable. I've a FSC Amilo Xa 3530 and my big problem is the massive heat. To my disappointment the BIOS didn't make a good job in control the fan, so I was looking for a solution. I've written a Linux kernel module to control the fan speed and I was able to find how to switch it on and off but with this information I found out how to enable manual mode and have 24 fan speeds. I want to share my code it should run with any Linux and with little modifications. It's just not finished yet, but I've tested the new registers with the RW tool on my Windows laptop and it seems to work. Thank you so much! I can't believe that Windows is so bad and I didn't know about those 24 speedsteps. I can understand that Linux is not supported. On Linux I use this great acer_regs.pl script and want to ask if I can use your formula to calculate the fan speed?

zsero · Oct 15, 2011

Jitamaro said: ↑

Hi prikolchik,

Sorry about the full quote, but I didn't read the full thread but I can now play some decent games or compile Linux with the full cpu speed without this thermal shutdowns!!! I've found this information very valuable. I've a FSC Amilo Xa 3530 and my big problem is the massive heat. To my disappointment the BIOS didn't make a good job in control the fan, so I was looking for a solution. I've written a Linux kernel module to control the fan speed and I was able to find how to switch it on and off but with this information I found out how to enable manual mode and have 24 fan speeds. I want to share my code it should run with any Linux and with little modifications. It's just not finished yet, but I've tested the new registers with the RW tool on my Windows laptop and it seems to work. Thank you so much! I can't believe that Windows is so bad and I didn't know about those 24 speedsteps. I can understand that Linux is not supported. On Linux I use this great acer_regs.pl script and want to ask if I can use your formula to calculate the fan speed?
Click to expand...

I'm not sure if prikolchik is subscribed to this thread, I would ask him in PM.

hepatocyt · Oct 16, 2011

is it possible to control the voltage of the ati? i want undervolt

PePe93 · Nov 27, 2011

same problem here but I'd like to overvolt my 5650 and turn it into 6550 by OC ;p Will the temps increase severely? It is safe to do something like that?

Jitamaro · Dec 24, 2011

zsero said: ↑

I'm not sure if prikolchik is subscribed to this thread, I would ask him in PM.
Click to expand...

I could solve my problem. I've also write a solution for Windows. Download-Link:Download.

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