Mini Howto for ALC268 fix audio after sleep.

[quinielascom]

1.- Download e install (mandatory) Chud.pkg

 

2.- Determine the I/O address of your HDAudio card with IORegistryExplorer or execute:

 

sudo ioreg -l -w 0 and search for:

 

"IODeviceMemory" = (({"address"=18446744073446359040,"length"=16384}) ) in the section just above the "AppleHDAController" in my laptop Acer 4320 is 18446744073446359040 (Hex 0xF0500000)

 

or lspci -nnv and check Memory Line:

 

00:1b.0 Audio device [0403]: Intel Corporation 82801H (ICH8 Family) HD Audio Controller [8086:284b] (rev 03)

Subsystem: Acer Incorporated [ALI] Unknown device [1025:011d]

Flags: bus master, fast devsel, latency 0, IRQ 22

Memory at f0500000 (64-bit, non-prefetchable)

Capabilities: [50] Power Management version 2

Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-

Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00

Capabilities: [100] #8086

 

For test put your laptop in sleep mode some seconds and after wakeup.

 

3.- Add 96 to the address found in step 2 and write 0x01470c02 to the location.

 

sudo reggie_se -D PhysAddr -w 0x01470c02 -a 18446744073446359136 -B 32

 

4.- Add 104 to the address found in step 2 and write 1 to the location.

 

sudo reggie_se -D PhysAddr -w 1 -a 18446744073446359144 -B 32

 

5.- Check for some sound, works it for you ? then continue reading for next steps.

 

6.- Download e Install SleepWatcher 2.0.5 this app will make all those commands for you.

 

7.- Edit the /etc/rc.wakeup script and add 2 lines:

 

reggie_se -D PhysAddr -w 0x01470c02 -a 18446744073446359136 -B 32

reggie_se -D PhysAddr -w 1 -a 18446744073446359144 -B 32

 

8.- Enjoy !

 

Original Guide: http://mydellmini.com/forum/mac-os-x/2124-...sleep-mute.html

[lilol18]

Man, i know this is not the place to ask, but i see you are in 10.5.7 with vanilla kernel. how did you update?? directly from apple software update?? if you did so, did you have some postinstallation problems like you have to reinstall all your hardware drivers??. i have a similar machine as yours with vanilla at 10.5.6, i want to update.

 

thanks, i'd really appreciate you could help me.