Fan control for my Dell SmartPC
There isn't any method to control the Fan in the dsdt ACPI table on my computer (DELL SmartPC/SmartStep).
Thanks to the ACPI Specs, I have implemented this code and there is no problem with the compilation. ACPI Linux driver indicates me that it finds a method for my two logical fans (one fan with 2 speeds). But I think that the adress (the namespace maybe EC0) is not good so I can't control it. How can I find the good region for my fan ?
OperationRegion (EC0, EmbeddedControl, 0, 0xFF)
Field (EC0, ByteAcc, Lock, Preserve)
{
MODE, 1,
FAN0, 1,
FAN1, 1,
, 5,
TMP, 8,
AC0, 8,
AC1, 8,
PSV, 8,
HOT, 8,
CRT, 8
}I think that it's this piece of code I have to change.
Thanks
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But is your fan ACPI controllable?
Mark
Quoted 38 lines · roychris
There isn't any method to control the Fan in the dsdt ACPI table on my computer (DELL SmartPC/SmartStep).
Thanks to the ACPI Specs, I have implemented this code and there is no problem with the compilation. ACPI Linux driver indicates me that it finds a method for my two logical fans (one fan with 2 speeds). But I think that the adress (the namespace maybe EC0) is not good so I can't control it. How can I find the good region for my fan ?OperationRegion (EC0, EmbeddedControl, 0, 0xFF) Field (EC0, ByteAcc, Lock, Preserve) { MODE, 1, FAN0, 1, FAN1, 1, , 5, TMP, 8, AC0, 8, AC1, 8, PSV, 8, HOT, 8, CRT, 8 }I think that it's this piece of code I have to change.
Thanks
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Signature · 9 lines
Mark Santcroos RIPE Network Coordination Centre http://www.ripe.net/home/mark/ New Projects Group/TTM ------------------------------------------------------- This SF.net email is sponsored by: ObjectStore. If flattening out C++ or Java code to make your application fit in a relational database is painful, don't do it! Check out ObjectStore. Now part of Progress Software. http://www.objectstore.net/sourceforge
Hi,
Quoted 10 lines
There isn't any method to control the Fan in the dsdt ACPI table on my
computer (DELL SmartPC/SmartStep).
Thanks to the ACPI Specs, I have implemented this code and there is no
problem with the compilation. ACPI Linux driver indicates me that it finds a method for my two logical fans (one fan with 2 speeds). But I think that the adress (the namespace maybe EC0) is not good so I can't
control it. How can I find the good region for my fan ?
Can you be more specific here:
- What was the original status/problem? (There was nothing w.r.t. Fan control at all in your original DSDT, but your machine has been kept chilled by Fan, correct?)
- What steps did you go through? (Trying to control Fan via ACPI by adding your own methods without knowledge as to how your Embedded Controller interacts with Fan controller etc.?)
The entire DSDT, both original and modified, will be required for further investigation, but honestly speaking, there's little, if any, hope of success...
Thanks,
- Adachi, Kenichi
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I have a complement :
"it seems like the fan stuff is on the SMBus which is at address 7A. The speed can be read from register 11 and written to register 10." I don't know how to use this information.
Quoted 42 lines · Kenichi
Hi,
Quoted 4 lines
There isn't any method to control the Fan in the dsdt ACPI table on my computer (DELL SmartPC/SmartStep).
Thanks to the ACPI Specs, I have implemented this code and there is no problem with the compilation. ACPI Linux driver indicates me that it finds a method for my two logical fans (one fan with 2 speeds). But I think that the adress (the namespace maybe EC0) is not good so I can't control it. How can I find the good region for my fan ?Can you be more specific here:
- What was the original status/problem? (There was nothing w.r.t. Fan control at all in your original DSDT, but your machine has been kept chilled by Fan, correct?)
- What steps did you go through? (Trying to control Fan via ACPI by adding your own methods without knowledge as to how your Embedded Controller interacts with Fan controller etc.?)The entire DSDT, both original and modified, will be required for further investigation, but honestly speaking, there's little, if any, hope of success...
Thanks,
- Adachi, Kenichi-------------------------------------------------------
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If flattening out C++ or Java code to make your application fit in a relational database is painful, don't do it! Check out ObjectStore. Now part of Progress Software. http://www.objectstore.net/sourceforge
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