Where does Dell i8200 hide it's fans?

Where does Dell i8200 hide it's fans?

[Marco Walther]

I've a Dell Inspiron 8200 and I know it has two fans. The Dell-laptop
driver is able to switch them but I don't see anything in the acpi
DSDT:-( 

The whole ThermalZone is really small:

    Scope (\_TZ)
    {
        ThermalZone (THM)
        {
            Method (_CRT, 0, NotSerialized)
            {
                Store (0x5E, Local0)
                Multiply (Local0, 0x0A, Local0)
                Add (Local0, 0x0AAC, Local0)
                Return (Local0)   /* 94 C */
            }

            Method (_TMP, 0, NotSerialized)
            {
                Store (GINF (0x04), Local0)
                Return (Local0)
            }

            Method (GINF, 1, NotSerialized)
           {
                SX10 ()
                SX30 (Arg0)
                SX11 ()
                Store (SX41 (), Local0)
                SX12 ()
                If (LLess (Local0, 0x0BA6))
                {
                    Store (0x0BA6, Local0)   /* 25 C, that's what I
					      * see in the /proc/acpi */
                }

                Return (Local0)
            }
        }
    }

There should be more but where would I find it?

Another question: The Dell DSDT has some parts which work differently
for different Windows OS's. Since this laptop is only supported with
WinXP, whould it make sense to to fake that even under Linux?

Thanks,
-- Marco

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RE: Where does Dell i8200 hide it's fans?

[Adachi, Kenichi]

Hi Marco,

> I've a Dell Inspiron 8200 and I know it has two fans. The 
> Dell-laptop driver is able to switch them but I don't see 
> anything in the acpi DSDT:-( 

Likely it's because "Dell-laptop driver" directly communicates with
Thermal monitor and programs PWM FAN controller. It's not a big surprise
to see that PC vendor doesn't expose FAN control to ACPI.

 
> Another question: The Dell DSDT has some parts which work 
> differently for different Windows OS's. Since this laptop is 
> only supported with WinXP, whould it make sense to to fake 
> that even under Linux?

If you're talking about _OSI which is defined by Microsoft and not
described in ACPI spec, your attempt shouldn't make a difference in
Linux. Microsoft wants to determine which version of Windows was in BIOS
writer's mind when he/she wrote ACPI BIOS for the machine. By knowing
the targeted Windows version, they can adjust their OS's behavior and
keep the compatibility for the end user's sake. For more details, please
take a glance at the following white paper:
http://www.microsoft.com/hwdev/tech/onnow/_OSI-method.asp


Thanks,
- Adachi, Kenichi




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RE: Where does Dell i8200 hide it's fans?

[Marco Walther]

>>>>> "KA" == Kenichi Adachi <Adachi> writes:

KA> Hi Marco,
>> I've a Dell Inspiron 8200 and I know it has two fans. The 
>> Dell-laptop driver is able to switch them but I don't see 
>> anything in the acpi DSDT:-( 

KA> Likely it's because "Dell-laptop driver" directly communicates with
KA> Thermal monitor and programs PWM FAN controller. It's not a big surprise
KA> to see that PC vendor doesn't expose FAN control to ACPI.

Why not? Isn't ACPI supposed to be `the' interface to all those
things?  Yes, I can use my own little way for each of them, something
of the fans/thermal control, something else for the batteries etc.

 
>> Another question: The Dell DSDT has some parts which work 
>> differently for different Windows OS's. Since this laptop is 
>> only supported with WinXP, whould it make sense to to fake 
>> that even under Linux?

KA> If you're talking about _OSI which is defined by Microsoft and not
KA> described in ACPI spec, your attempt shouldn't make a difference in
KA> Linux. Microsoft wants to determine which version of Windows was in BIOS

No, not only the _OSI method but I'm seeing also a OSID method in my
DSDT which returns a bitfield based on the _OS/_OSI and the result of
this is used in different parts of the DSDT again.

    Method (OSID, 0, NotSerialized)
    {
        If (LEqual (MIS3, 0x00))
        {
            Store (0x04, MIS3)
            If (CondRefOf (\_OSI, Local0))
            {
                If (\_OSI (WXP))
                {
                    Store (0x40, MIS3)
                }
            }
            Else
            {
                If (STRE (\_OS, W98S))
                {
                    Store (0x08, MIS3)
                }

                If (STRE (\_OS, NT5S))
                {
                    Store (0x10, MIS3)
                }

                If (STRE (\_OS, WINM))
                {
                    Store (0x20, MIS3)
                }
            }
        }

        Return (MIS3)
    }


KA> writer's mind when he/she wrote ACPI BIOS for the machine. By knowing
KA> the targeted Windows version, they can adjust their OS's behavior and
KA> keep the compatibility for the end user's sake. For more details, please
KA> take a glance at the following white paper:
KA> http://www.microsoft.com/hwdev/tech/onnow/_OSI-method.asp

This works both ways.  The BIOS can also adapt to the OS mostly the
same way:
....
            Method (_CRS, 0, NotSerialized)
            {
                CRS3 ()
                CR_0 (0x01, 0x00, 0x0009FC00)
                CR_0 (0x01, 0x0009FC00, 0x0400)
                If (LOr (LEqual (OSID (), 0x10), LEqual (OSID (), 0x40)))
                {
                    Store (GORL (), Local0)
                    CR_0 (0x00, 0x000C0000, Local0)
                }

.....

Thanks,
-- Marco


KA> Thanks,
KA> - Adachi, Kenichi

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Re: Where does Dell i8200 hide it's fans?

[Jan Slezak]

You reported the problem with zero values in /proc/acpi on your Dell some time 
ago. I have the same problem. Did you resolve this problem or do you have any 
information about this problem?

Thanks,
Jan


Dne pá 24. leden 2003 21:43 Marco Walther napsal(a):
> I've a Dell Inspiron 8200 and I know it has two fans. The Dell-laptop
> driver is able to switch them but I don't see anything in the acpi
> DSDT:-(
>
> The whole ThermalZone is really small:
>
>     Scope (\_TZ)
>     {
>         ThermalZone (THM)
>         {
>             Method (_CRT, 0, NotSerialized)
>             {
>                 Store (0x5E, Local0)
>                 Multiply (Local0, 0x0A, Local0)
>                 Add (Local0, 0x0AAC, Local0)
>                 Return (Local0)   /* 94 C */
>             }
>
>             Method (_TMP, 0, NotSerialized)
>             {
>                 Store (GINF (0x04), Local0)
>                 Return (Local0)
>             }
>
>             Method (GINF, 1, NotSerialized)
>            {
>                 SX10 ()
>                 SX30 (Arg0)
>                 SX11 ()
>                 Store (SX41 (), Local0)
>                 SX12 ()
>                 If (LLess (Local0, 0x0BA6))
>                 {
>                     Store (0x0BA6, Local0)   /* 25 C, that's what I
> 					      * see in the /proc/acpi */
>                 }
>
>                 Return (Local0)
>             }
>         }
>     }
>
> There should be more but where would I find it?
>
> Another question: The Dell DSDT has some parts which work differently
> for different Windows OS's. Since this laptop is only supported with
> WinXP, whould it make sense to to fake that even under Linux?
>
> Thanks,
> -- Marco


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Re: Where does Dell i8200 hide it's fans?

[James D Strandboge]

On Sat, 2003-01-25 at 12:50, Jan Slezak wrote:
> You reported the problem with zero values in /proc/acpi on your Dell some time 
> ago. I have the same problem. Did you resolve this problem or do you have any 
> information about this problem?
> 

I too would be interested in this.  I am still using 20021118 because
anything later just didn't work.  If you are hacking the DSDT, I'd love
some info on what you are doing, because our DSDT is so cryptic (to me
anyway).

Jamie 

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RE: Where does Dell i8200 hide it's fans?

[Grover, Andrew]

> From: James D Strandboge [mailto:jstrand1-aYIB8uWIUb2Vn7q6wjsIow@public.gmane.org] 
> I too would be interested in this.  I am still using 20021118 because
> anything later just didn't work.  If you are hacking the 
> DSDT, I'd love
> some info on what you are doing, because our DSDT is so cryptic (to me
> anyway).

20021118 works but 20021122 doesn't? Let me take a look...


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