dv4t fan speed control?

bump for interest

cheers ...

If you have NVIDIA GPU chipset, nothing you can do to control the fan as the bios is hardcoded to keep the fan always ON to reduce thermal stress on this chip.

Turn your music higher, there is your solution

You will get used to the fan noise. The fan is needed and can not be eliminated from the engineering process unless you convert the unit to having liquid cooling.

This is from member Verisign in another laptop forum. Try with your own risk.

It appears I will be the first person on the net to successfully solve that annoying problem with newer HP notebooks fan Now my HP DV5-1150en laptop is completely cool and quiet (while browsing, doing office work etc).


So, as many of HP DV5, DV7 laptops (and even older series) users have complained, the fan in those notebooks is just horrible:

a) It always on, and you cannot disable this feature in BIOS, despite the fact that there is an option “Fan always on” (problem comes with some kind of BIOS update, maybe from F.08 and later).

b) Very loud, noisy and annoying fan, even if the temperature of CPU / GPU is rather acceptable, even in idle and power saving modes.

c) Fan becomes even more louder and spins faster while power cable is connected, making the work with the laptop rather brain-breaking and uncomfortable. Moreover, heating and temperatures increase while charging, what also affecting the fan speed.



So, a week ago I have purchased the HP Pavilion dv5-1150en Entertainment Notebook with the following specs:

AMD Turion X2 Ultra Dual-Core ZM-82 2.2 GHz; 4096 MB DDR2 800 MHz, 320 GB SATA HDD 5400 rpm; 15.4 WXGA BrightView Widescreen; ATI Mobility Radeon HD 3450 with 512 MB dedicated memory etc. You can view the full specs sheet here: http://www.flex.ee/datasheets/HP_dv5-1150en.pdf

Of course, the first thing I have noticed is that always running loud fan that is so annoying that you just can’t concentrate while working with the laptop.



Have tried to solve the problem in several ways, without any result:

1. Changing the Vista power settings, enabling power saving modes.

2. Searching for some software to control the speed of the fan or to reduce the frequency of the CPU, but currently there is no such utilities available on the net for HP dv5 notebooks and for Turion Ultra processors. Such popular programs like SpeedFan, Notebook Hardware Control etc. does not support newer HP laptops.

3. Updating and downgrading the BIOS to make the “Fan always on” option disabled. My dv5 1150en comed with F.11 BIOS, I have tried to downgrade to the oldest available from HP Software & Driver downloads for my laptop (because newer BIOSes have the same problem with fan always on): http://h10025.www1.hp.com/ewfrf/wc/s...812328&lang=en

But after installing this F.05 bios from Vista, the laptop even won’t boot, it was basically the black screen with leds on after the power button pressed. So I have performed the Insyde H2O BIOS recovery procedure: downloaded another bios version (F.12), extracted the sp41253.exe file with WinRAR, found there 30F2F12.fd file (it’s BIOS source file), renamed it to 3600.BIN (where 3600 is the model number of DV5 laptops), copied to USB flash drive, removed the battery and power cable from laptop, pressed the WinKey+B combination on the keyboard, inserted the USB flash drive, inserted power cable, turned the notebook on while keeping those keys pressed, and after some minutes of beeping I had a good working BIOS installed



But the problem with fan was still unsolved. I have even thought to return the laptop back to shop, because it’s very important for me to have a quiet PC and to work in comfortable environment without noise. For example, my desktop PC (Quad Core Intel Q6600 3GHz, 4 GB DDR2, GeForce GTX280 1GB) is completely quiet while not gaming, because of a good CPU cooler and a software speed control of CPU and GPU fans.

I have googled across the internet a lot on this HP fan problem, but only one article helped me to solve it.


Here is the solution: http://notebookequus.blogspot.com


Read that article carefully. Yes, it appears that patching the DSDT table is the only way to cope with that annoying HP Pavilion fan. And this rather simple procedure works with dv5 also, although the fan speeds are written in DSDT table in more complicated way.

So, now I will explain DSDT table patching actions performed with my laptop. Follow the text of above given guide by its paragraphs, I will give some comments how it is done on dv5:



(Introduction paragraphs). Here I just want to add, that you cannot use the mentioned software (HWMonitor) to monitor the Turion Ultra CPU and DV5 laptop’s thermal characteristics, because as for my laptop, it wasn’t supported by that soft.

1st paragraph. The same.
2. The same.
3. The same. DSDT table patch in registry was: HKEY_LOCAL_MACHINE\HARDWARE\ACPI\DSDT\HP____\3600____\f0000000

4. The same.
5. The same.
6. The same.
7. The same.
8. The same.
9. The same
10. The same, but...

11, 12. As you know, the fan in dv5 (or in other HP laptops with newer BIOS) is always on, so there won’t be zero fan speed written in the DSDT table (don’t search for 0x0). And the list of fan speed numbers is much more complicated here, because the dv5 uses some very retarded fan control

As for my laptop, the list we need to edit looks this way:

Name(BCLT, Package(0xd)
{
0x64,
0x30,
0x13,
0x18,
0x1d,
0x22,
0x27,
0x30,
0x37,
0x3d,
0x47,
0x50,
0x64
})

In integer numbers (converted from hex) the fan speeds (in percent from maximum speed) are following:

100
48
19
24
29
34
39
48
55
61
71
80
100

So, in order to reduce speeds correctly and precisely, maybe we need some experimental testing. But I a have just changed the table in this way:

Name(BCLT, Package(0xd)
{
0x64,
0x30,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x47,
0x50,
0x64
})

I.e., replacing some of the intermediate values with 0x13 (what is equal to 19% fan speed) was rather good decision for me.



BTW, for testing purposes, don’t forget to create a new power plan in Vista before applying those settings. We need the power plan with less power consumption and less CPU frequency (in this case the CPU shouldn’t become very hot even under heavy load). I have created a new power plan from the Vista’s original “Power saver” plan. In the new plan, in advanced power settings, in Processor power management section, I have set the Minimum processor state to 5% and the Maximum processor state to 50% (both for battery and for plugged in). I have also set here the ATI graphics PowerPlay settings to “Maximum Battery Life”.

Then I have checked with the AMD Power Monitor Version 1.2.3 utility (can be downloaded here: http://www.amd.com/gb-uk/Processors/..._14098,00.html ), that my CPU cores are running at 550 MHz (30%) each when idle, and on 1.1 GHz (50%) when load, so the clock never increasing to the max 2.2 GHz (100%) with such power plan, what reduces the heat very well. I have applied this plan before enabling DSDT table changes (the fan was noisy as usual, even with such power plan).



13th paragraph. The same.
14. The same.
15. The same.



That’s all! I have restarted my laptop, and the fan speed settings have really been changed, because now most the time my fan is working at 19%, what means very quiet (absolutely comfortable for hearing). Even when power cable is plugged in (battery charging), the laptop still remains quiet (before patching the DSDT, as you know, it became much louder while charging, but now it remains quiet).

Currently I use that updated table mostly with described before “reduced-CPU-clock” power plan (with max clock 1.1 GHz at each of Turion Ultra cores). It’s absolutely suitable for any king of internet surfing, for MS Office and Windows tasks, for non-HDTV video watching etc.



The CPU temperature stays at 47-55 Celsius, what is very acceptable for Turion Ultra CPU. Under long heavy load (for testing I use EVEREST software, there is System stability test that stresses CPU to 100% load), the temp goes to 60-67 degrees (and approximately from 62 C the next steps of fan speeds are being enabled, fan becomes louder, but still much more quiet, than before DSDT patching). So under load the temps are also rather good, no problems here. And the temp of ATI GPU (with power saving enabled while not gaming) is also always normal, 47-50 C. I monitor the temps with SpeedFan and EVEREST software.

So the next step could be even disabling the fan (setting the speed to 0x0 somewhere in the middle of DSDT fan speed list) when working in windows.

If I set CPU clock to max 2.2 GHz (for example, by switching to another Vista power plan, "High Perfomance"), the temps begin to rise quickly, but I think nothing dangerous here, because the fan, even with modified table, also increases its speed (not so fast, as before, therefore remains more quiet). For example, on 2.2GHz, while watching 1080p HDTV video (what means almost 100% CPU load), I had the temp of 82 C (for mobile AMD CPU, it’s not the temp you should panic about).

Of course, on 2.2 GHz, if you would like to play 3D games, to watch HDTV for a long time, to do some processor-dependent tasks that require high clock etc. – I recommend not to risk and to switch to original DTST table that you had before patching (as you can see in the article, switching and recovering tables is very simple, but the fan noise will return). On the other hand, while working on 1.1 GHz, even under heavy CPU load, you will always have acceptable temp, so with such power plan there is no need to switch tables.



So I suppose my post will help you to solve those annoying fan problems on HP notebooks

Please write your feedback, and post here the DSDT fan speed lists and configurations you have tested and liked on your laptop. Don’t forget to mention your laptop’s model and specs, and to include the original DSDT fan speed table. Maybe the same method will perfectly work not only with HP, but also with the laptops of other manufacturers, some testing needed here. BTW, if you will manage to write a better guide on solving the problem (with pictures, videos etc.), please post it here or send me via PM, i will update this post then.

So, the conclusion is simple: on latest HP Pavilion notebooks, currently it’s the only way to save your nerves and brain from that loud always-on fan, yeah

^^ Not for the fainted hearts :-)

Cool input!

cheers ...

so i have the dv4t also (like the person who started this thread) and i tried to use this earlier. i was able to locate the dsdt table, but when i was looking in the file, i couldn't find anything like this in your dv5:

Name(BCLT, Package(0xd)
{
0x64,
0x30,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x13,
0x47,
0x50,
0x64
})

but i can't find a similar chunk of code in my dsdt.asl file.. maybe i could email it to you so you could take a look? i think it is in hexidecimal, but instead of 2 digit numbers following the x, they range from 1 to 4 digits (e.g. 0x2e10, and such)? do you know what that might mean?