Resolving the shutdown problem

[Needy]

Hello there.

In this topic I'll present you a different fix for the shutdown problem* on gigabyte motherboards. It may work on other motherboards as well but I haven't tested it. You're most welcome to join me on this "journey" but testing it.

First of all, let's begin with some useful information.

What's SMBus and what's its purpose in life?

The System Management Bus (abbreviated to SMBus or SMB) is a single-ended simple two-wire bus for the purpose of light weight communication. !* Most commonly it is found in computer motherboards for communication with the power source for ON/OFF instructions.

- copied from google.com

The above information indicates that the absence of SMBus device in DSDT will make the system management bus useless. Consequently, there will be a shutdown problem.

Now, the information you were seeking from the beginning.

How to fix this problem?

The fix for this problem is very simple. I didn't invent it, it was there for a long time but it was not explained.
 

• Method
  
  You could patch the DSDT manually by using the SBUS fix from DSDT editor patches. However, if you don't have it here's a link.
  

  http://olarila.com/Patches/Desktop/SMBUS.txt

• Method
  
  If you're using clover it's even easier. All you have to do is to edit your config and add the following line under ACPI - DSDT - Fixes
  

  <key>FixSBUS_0080</key>
  <true/>
  

  Final configuration should something like the following.
  

  	<key>ACPI</key>
  	<dict>
  		<key>DSDT</key>
  		<dict>
  			...
  			<key>Fixes</key>
  			<dict>
                                 ...
                                 <key>FixSBUS_0080</key>
                                 <true/>
                                 ...
  			</dict>
  			...
  		</dict>
                  ...
  	</dict>
  ...

If the above methods didn't work or you are not pleased with the results and you have a Gigabyte Motherboard then you can try a more advanced DSDT patching following instructions from the link below.

Instruction Nr. 16, _PTS Method

http://www.insanelymac.com/forum/topic/196771-ga-ex58-and-ga-x58a-dsdt-native-power-management-modifications/

Best regards.


* - Everything is in off state but the "PC".
!* - Important information.
... - Other stuff you have added before.

[espacioami]

Does this patch work on a GA-z97n Wifi to solve my shutdown problem? (Leds on 10-15 second till power off)

 

Thanks!

[Needy]

Does this patch work on a GA-z97n Wifi to solve my shutdown problem? (Leds on 10-15 second till power off)

 

Thanks!

Hello there,

 

You could try.

 

However, 10-15 sec is normal behaviour.

 

Best regards.

[espacioami]

I tried and it did not worked (leds still on...)

Thank you anyway Needy