Replacing G570 fan

[rzrfreefr]

check this thread it opens a track on EC :

http://forums.lenovo.com/t5/Lenovo-3000-and-Value-line/Lenovo-G560-problem-with-fans/m-p/615787#M334...

I use GNU/Linux too but the weird thing is that I have different limits on g470 :

 LANG=C sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:         +0.0 C  (crit = +127.0 C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +49.0 C  (high = +86.0 C, crit = +100.0 C)
Core 0:         +49.0 C  (high = +86.0 C, crit = +100.0 C)
Core 1:         +48.0 C  (high = +86.0 C, crit = +100.0 C)

[armin22]

Dear Lenovo support

I'm having the same problem with the noisy fan. So, every week, I visit this site hoping there will be a solution available. However, every time I get disappointed by you!. I bought a G570 relying on good quality and support.

Is there anyone from Lenovo who reads this and feels responsible? The least thing I would expect is that there will be an announcement that you are working on it and a solution will be available in blablabla.

I have never seen such a weak support. I wonder if you can deal with your customers in such a manner. I don't think that I will buy again a Lenovo product having made such a bad experience.

Regards

Armin

[armin22]

-------------- push!-------------

@Lenovo support: Is there a solution available? Will this be our Christmas present?

[smaaz]

point is there is something wrong .. as my two year old toshiba laptop fan start at 60C and shuts of at 55C similar is the case with my sis dell ..

Thing is fan on my lenovo g570 does goes off but the trip valus is way too low 42C,

Lenovo plz give a revised bios with a fix to this problem .. as normally even in winters temps are shy of gettting down to 42C.

[Uryupinsk]

Yeah, common Lenovo!

[fmcsimmons]

Step up to the plate, Lenovo. This should be a simple fix and it is long overdue.

[Nikowhy]

Well i just don't know what to think anymore, after i bought the lenovo g 570 i had to deal with the robotic sound issue nightmare described in other forums.I also stumbled upon the Lenovo Boot Optimizer Loop problem, also mentioned in many forums on the net. So i went to the shop, described my problems, they shipped the machine back and after 12 days i could take it home and the sound issue was resolved. In the repair protokoll was noted that the fan had been changed.

And here i am now with my soul still hurting as my fan spins all the time as if i'm playing Crysis 2 or something like that, thinking of bringing it back to the service center again.

This can't be right, you can't sell stuff like that to people, and i can't accept using my laptop only 2 weeks a month, having to spare an extra afternoon (for hte 3rd time ) to reinstall all kinds of software in order to make use of it.

So if this a forum on the official lenovo website, then someone should officialy respond to so many posts.it's just not cool like that.

[mark2]

Some users with fan problems on G570/770/470 have started independant threads.  The solution might be solvable by fixing the laptop's ACPI implementation.  This is done by reprogramming the DSDT.

This thread should house all discussion about advances in fixing the fan problem found via DSDT reprogramming.

[mark2]

The first problem I have corrected is the ACPI thermal zone returning 0 temperature all the time.

On Gnu/Linux, running the lm_sensors program "sensors" would always return 0c for the virtual thermal zone "acpitz-virtual-0"

mark@lenovo ~ $ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +0.0°C  (crit = +127.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +51.0°C  (high = +80.0°C, crit = +85.0°C)
Core 0:         +50.0°C  (high = +80.0°C, crit = +85.0°C)
Core 1:         +44.0°C  (high = +80.0°C, crit = +85.0°C)

After patching the DSDT, the thermal zone reports a temperature, it might not be the right one, but it's bettern than 0.

In the function \_TZ_.TZ00._TMP the EC register ENDD is always 0, replace it with CTMP

            Method (_TMP, 0, Serialized)
            {     

                Store ("TZ00 _TMP called", Debug)

                //unsure if this is useful, ENIB always has 0x8400 in it
                Store (0x8400, \_SB.PCI0.LPCB.EC0.ENIB)
                /*Store (\_SB.PCI0.LPCB.EC0.ENDD, Local0)*/
                Store (\_SB.PCI0.LPCB.EC0.CTMP, Local0)
                //turn Deci-Kelvins into Celcius
                Add (0x0AAC, Multiply (Local0, 0x0A), Local0)
                Store (Local0, PTMP) 
                Return (Local0)
            }

[Arshes-Nei]

Mods,

Why did you move this to a specific  model number?

This is affecting more than one series of G laptops.

This information will just get buried when users only want a solution.