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ALC655 + VIA8237R stereo fix


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#1
pattjin

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Here's a new AppleAC97AudioVIA.kext so you can get stereo out of a VIA 8237R + ALC655 (I don't think the codec part matters as much as the controller)

Should work with any VIA 82xx chipset.

Hooray!

Attached Files



#2
Proteo

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That's great, thanks dude!

I'll test it and report back.


Edit: Greeeeeat!! I have sound on both speakers now! It worked like a charm :P Thank you again pattjin!

My specs:

Southbridge: VIA VT8237 (487 BGA)
Sound chipset: Realtek ALC655

This is now on the HCL 10.4.5 Wiki

#3
skeewiff

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Worx here! pattjin U´re the man!! Just wanted to know how U managed this driver please give us more info so we could fix the input too!


One question: my volume slider doesn´t work at all is this normal?

Edit: Just tested my input and worx too! I´m very happy!!! No need 2 buy an expensive (or unexpensive) USB sound card!!

I knew that someone ´ll make it sooner or later

#4
Proteo

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One question: my volume slider doesn´t work at all is this normal?


My volume slider works just fine.

#5
JaS

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Great Ill test this in my sse2 box right now

#6
skeewiff

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Jas / Proteo can one of U tell me why my volume slider does not work at all? The rest is OK but my volume slider is useless!

I think my chipset is VIA VT8233 not sure I´m gonna check it in Windows now

Also any ideas how to add this to a ISO DVD?

#7
Deviant0ne

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This is awesome! Thanks, I'll give this a try as soon as I get home this afternoon. I've long been searching for a cure to this left-channel only annoyance

#8
JaS

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20AppleAC97AudioEngine is not compatible with its superclass, 13IOAudioEngine superclass changed?
kextload: a link/load error occured for kernel extension /System/Library/Extensions/AppleAC97Audio.kext/
load failed for extension /System/Library/Extensions/AppleAC97Audio.kext/

this is in 10.4.6 so it seems this was compiled on a earlier build,too bad i was getting happy about stereo on this box

#9
skeewiff

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Could someone compile it please 4 10.4.6 now that I´m studying to upgrade?

#10
Proteo

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skeewiff:

Actually I did nothing but replacing the file and repair its permissions with the usual commands. Are you having error messages during boot process?

JaS:

I'm using 10.4.6 Myzar patch, not sure if it's different from yours at this level. What chipset do you have?

#11
Deviant0ne

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I just got a chance to try this out, and it's not working at all for me. Now it's saying there are no audio devices on my computer. I replaced the original file with this new one, then did chown -R root:wheel /System/Library/Extensions/AppleAC97Audio.kext - Am I perhaps missing a step? I'm using a VIA 8237 + ALC655 chip, and the 10.4.6 DVD from JaS. Does this not work with JaS' 10.4.6?

#12
skeewiff

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Proteo: No error on booting just to say that I had this bug before I installed this kext the volume slide didn´t worked. I´m in 10.4.5

#13
JaS

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maybe myzars is using some of the old 4.5 frameworks all i know is in this 4.6 install it's not working.Send me the souce and ill compile it for 4.6

#14
Proteo

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Copy and paste the new file to /System/Library/Extensions/. Choose authenticate in the dialog and enter your password. Replace the file.

Then open Terminal and type:

sudo -s

(enter your password)

cd /System/Library/Extensions

rm Extensions.mkext Extensions.kextcache

(no problem if one or both files don't exist)

chown -R root:wheel *.kext

kextcache -k /System/Library/Extensions

(exit terminal)

Applications > Disk Utility > select your volume and repair permissions

Quit and reboot.

That's exactly what i did and it worked like a charm.

#15
JaS

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huh?the superclass is not the same.it wont load.

20AppleAC97AudioEngine is not compatible with its superclass, 13IOAudioEngine superclass changed?
kextload: a link/load error occured for kernel extension /System/Library/Extensions/AppleAC97Audio.kext/
load failed for extension /System/Library/Extensions/AppleAC97Audio.kext/

#16
echo

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Yoooohoooo, Pattjin,..... IT WORKS..

Great Work man.....

Thanks for making it stereo

#17
ChiefWiggum

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:guitar: :whistle:

Finally music in stereo !!!
Thanks a lot !!

Almost time to dump windows now...

#18
Vinx

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It works for me too !

Excellent work !

#19
pattjin

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You could try just copying the file AppleAC97Audio.kext/Contents/PlugIns/AppleAC97AudioVIA.kext/Contents/MacOS/AppleAC97AudioVIA, since that's really the only part that changed.

Of course, make it root:wheel, and all the permissions and stuff like that.

Now to see if I can figure out the other channels and maybe the onboard VIA8237 Ethernet as well.

Pat

#20
skeewiff

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For those that this work:

a) Is the onboard audio present in the system profiler?

:hysterical: Does work the volume slider? Mine is VIA8237 and doesn´t work





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