HP ProBook 4530s - Fan always on - Help with DSDT editing or NHC ACPI module

[jhonq]

It's decent. You will need tpfc to lock it at the lowest speed, because if left on it's own, the laptop will start the fan when cpu temp gets to 40C, but will start it at a higher than lowest speed, that can bother some users.

[ryangoan]

hey jhonq!

thanks for putting in so much effort! i look forward to having the ability to control the fan on my 4330s.

hp should hire you, as you are gonna make a whole lot of us probook 4x30s owners super happy

cant wait!

[jhonq]

Meh... i did nothing but some testing.

troubadix
is one who should get the credit. Guys like him went out and wrote the tools for us.

I think in ~ a week we should get a working TPFC for HP.

In the meantime, i just found a nasty EC bug and i'm stuck as i don't know how it can be easily dealt with:

After a standby, restart or even at cold boots, cpu and gpu temps are sometimes locked at 20C (14 hex) - http://img163.imageshack.us/img163/6480/startupbug.jpg

This causes a major issue as tpfc can't use the gpu temp as cpu temp and doesn't know what tot do, so it just sets fan speed to max.

The EC gets reset and cpu + gpu temp are read OK when opening the sensors page in AIDA - http://img10.imageshack.us/img10/675...ensorsinai.jpg

The moment the EC receives this "reset" and the GPU temp is reported as it should, TPFC works just fine - http://img607.imageshack.us/img607/2341/tpfcrestart.jpg

There are some minor TPFC changes needed to make it trouble free for most users and troubadix said he would implement them sometime next week.

If i don't find a way to fix this EC temp reporting bug at standby/restart/cold boot, users will have to manually open for a second the sensors page in AIDA64 to reset temps, then open TPFC and all will be good.

[jhonq]

Soon...

[hhhd1]

i got a chance to test the method you posted in post #13 ( HP ProBook 4530s - Fan always on - Help with DSDT editing or NHC ACPI module )

i edited byte '38' to 1D (29c), but the fan did not move, .. i then edited it to FF, the computer shutdown imediatly, next time i opened the bios displayed a message telling me that the computer was closed due to a very high temp.

i am guessing that different versions of bios behaves differently.

[jhonq]

Well, think about it! When you wrote FF to byte 38, you just set the cpu at 255C!

Don't worry, i learned that just like you. To reset the cpu temp, you just need to write 00 at byte 38, not ff!

Did you verify though that when you entered 1d at byte 38, the cpu temp changed? Just have sensors page of aida64 open and look at the cpu temp.

Can you provide a print screen just like the one you see below?

http://img528.imageshack.us/img528/6881/aidarw.jpg

[hhhd1]

also, i was wrong, to totally reset the value of the EC to be controlled by the EC again, you must disconnect the power source. a simple power off/ power on might not be enough, even if it is enough to reset fan control.

[hhhd1]

Well, think about it! When you wrote FF to byte 38, you just set the cpu at 255C!

Don't worry, i learned that just like you. To reset the cpu temp, you just need to write 00 at byte 38, not ff!

Did you verify though that when you entered 1d at byte 38, the cpu temp changed? Just have sensors page of aida64 open and look at the cpu temp.

Can you provide a print screen just like the one you see below?

http://img528.imageshack.us/img528/6881/aidarw.jpg

just set ec byte 38 to '1D'

it does change 1 of the temps viewed by the 'speedfan' software that i have.
the "temp5".
the "temp5" does read the value of the EC's byte 38 properly.


just installed aida, and it does not see it like it is in your screen shot, now all the cpu * (under temperatures) temps are around 40



edit:
setting it to 00 resets it back fine

[jhonq]

So can you provide a screen just like the one i posted?

Have RW with EC open and next to it aida sensors. It's super easy.

Also, try with 1f at byte 38!

Edit: Don't use speedfan, as it causes issues with editing byte 38! I've just tested and editing byte 38 does not turn off the fan if 1f is entered and speedfan is open/was open.

Close speedfan, open sensors page in aida (this does something and sends some "reset" to the EC), now open RW and edit byte 38 to 1f. Works for me.

Edit again: Just uninstall speedfan as it's useless for laptops. It can't change any speed, temps are read "temp1" etc and it also fingers the EC in a funny way, causing only issues. The only "approved" and also necessary tool (at this moment) is aida64. The sensors page has all the info one needs, plus, opening it (sensors page) resolves the EC bug i have described at post 23.

[hhhd1]

i think a screen shot is not necessary, it is just like yours, except the cpu temp was not displaying the correct value edited in the ec.

now the screen shot is not necessary at all even more than before, i just followed what you said, uninstalled speedfan, which unistalled also its service running in the background all the time, and now when editing the ec, the temp changes just fine like in your screen shots :-)

i used to like speedfan cause it provided a way to do graphs of temps, and to display any temp i choose in the windows taskbar

now i am having problems activating aida64 , might only work for a month.


i am considering trying to disable dual core processor and hyper threading from bios, maybe it would affect the heat produced, and make it possible to run for longer periods with no fan ..