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I got the Lenovo B470, the spec. Is nearly the same as your B570 except the sound controller is ALC272.Since I see you have accomplished the installation of lion on it, may I know that your HD 3000 is running with QE/CI enabled (Transparent Menubar) or not? Or it is just able to change the resolution without the QE/CI enabled?Thanks a lot!The HD3000 is running with QE/CI and I'm able to change resolution.I have some artifacts from time to time but nothing serious.I'm not sure but I believe that the HD's can differ much between models, because I tried a DSDT Hack I saw on YouTube that should deal with the artifact problems with HD3000 on Lenovos and it totally scrambled my display!But as I said, I can live with it.Do you using Graphics Enabler? Because my HD is running only WITHOUT out. With GE I have no QE or worse I get KP's. Have you disabled it?I presume that if you have the ALC272 you are using VoodooHDA too?Have you any idea how to change bit depth in the plist? The HD3000 is running with QE/CI and I'm able to change resolution.I have some artifacts from time to time but nothing serious.I'm not sure but I believe that the HD's can differ much between models, because I tried a DSDT Hack I saw on YouTube that should deal with the artifact problems with HD3000 on Lenovos and it totally scrambled my display!But as I said, I can live with it.Do you using Graphics Enabler?

Because my HD is running only WITHOUT out. With GE I have no QE or worse I get KP's. Have you disabled it?I presume that if you have the ALC272 you are using VoodooHDA too?Have you any idea how to change bit depth in the plist?I just built finished installation of iAntares 10.7.1 on it, most of the thing goes good.

And yes for the ALC272 I use VoodooHDA 2.73, it drive good on sound with SSE2 enabled checked, however, I don't know how to change the bit depth of it.Now, this built still have these problems:1. Built in screen brightness control is missing with Fn-up/down key, thought, I can use shade to fullfil this function2.

The Lenovo Cam is not work, black screen3. No HDMI audio come out, Speaker is ok. I just built finished installation of iAntares 10.7.1 on it, most of the thing goes good.

And yes for the ALC272 I use VoodooHDA 2.73, it drive good on sound with SSE2 enabled checked, however, I don't know how to change the bit depth of it.Now, this built still have these problems:1. Built in screen brightness control is missing with Fn-up/down key, thought, I can use shade to fullfil this function2.

The Lenovo Cam is not work, black screen3. No HDMI audio come out, Speaker is ok1. I tried this and I'm having brightness control in my display settings now, but changing it makes no difference.

I think my DSDT has to be corrected. Maybe you can give it a try and tell me how it worked.2. For the webcam you have to use. You can start it before or after starting Photobooth et al. And you'll get a picture (if your webcam is recognized at all, which you can do by adding correct ID's in the iSight next).3. Audio really needs to be fixed. Since I've been searching so long now, I think it is impossible to add bit depths in VoodooHDA.

That audio out is working correctly indicates that it has something to do with incorrect nodes for the other devices. But don't ask me how to do this. I tried patching AppleHDA with codec dumps but still no success.

Mine are on 'Ins' and 'Home'. So I have to find out, how to change the keys.2. Don't know but when cam twist works for you: great!3. I'm using the ALC272 patched AppleHDA with the patched dsdt HDEF section from here now:Deleted VoodooHDA and get no random KP's on boot anymoreHDMI doesn't work with it but I don't need it.

For you, maybe a look at the dsdt code could tell you what to do. I believe you have to add HDMI to the graphics device.4. So that everything else is working for me know, it freaks me out that this little damn thing does not.Hello sorry, please upload dsdt HDEF patch.the file DSDT.aml for Lenovo G570thanks. Hello sorry, please upload dsdt HDEF patch.the file DSDT.aml for Lenovo G570thanksSorry I can't do that.

Every dsdt is unique for every system and you have to dump it for yourself by using any dsdt editor around (DSDTSE for example). Then you can copy the code for the hdef device from the dsdt in the post into your dsdt (for detailed instructions look into DSDT forum). But it will only work if your model uses ALC272!

Lenovo puts Conexant, ALC272 or Intel Audio in their B-series, so you just have to try. Sorry I can't do that.

Every dsdt is unique for every system and you have to dump it for yourself by using any dsdt editor around (DSDTSE for example). Then you can copy the code for the hdef device from the dsdt in the post into your dsdt (for detailed instructions look into DSDT forum). But it will only work if your model uses ALC272! Lenovo puts Conexant, ALC272 or Intel Audio in their B-series, so you just have to tryThanks.i have the model Conexant, the dsdt fix don't work for me, but the voodoohda 2.7.2 is ok, i have fixed the boot time problem with the bootloader Chimera 1.5.4, i have the full support native for Intel HD 3000 and the boot time is ok, kernel cache.try it. Thanks.i have the model Conexant, the dsdt fix don't work for me, but the voodoohda 2.7.2 is ok, i have fixed the boot time problem with the bootloader Chimera 1.5.4, i have the full support native for Intel HD 3000 and the boot time is ok, kernel cache.try it.Thanks, tried it.

But unfortunately still the same with Chimera – GE gave me errors on boot and no QE in OS X and my bluetooth and audio didn't work anymore! Cache was used once on first boot and then never again.I think I stay with Chameleon 1577.

Better to live with OS X not using the cache and having a working system. Thanks, tried it. But unfortunately still the same with Chimera – GE gave me errors on boot and no QE in OS X and my bluetooth and audio didn't work anymore! Cache was used once on first boot and then never again.I think I stay with Chameleon 1577. Better to live with OS X not using the cache and having a working systemVery Strange!, i have problem with Chameleon any version freeze in the start bar(don't work any keys, F8 ecc.) with the quick load(mod setting) work but don't load the graphic kext.freeze image in the end of loading.but in background the system works.With chimera i have stable system and work QE/CI.I'm different Notebook Lenovo G570 i3-2310m.

Very Strange!, i have problem with Chameleon any version freeze in the start bar(don't work any keys, F8 ecc.) with the quick load(mod setting) work but don't load the graphic kext.freeze image in the end of loading.but in background the system works.With chimera i have stable system and work QE/CI.I'm different Notebook Lenovo G570 i3-2310m.I had similar problems with Chameleon versions higher than 8xx (Chimera 1.5.4 is based on a 13xx build) that were instant reboots and so forth. Versions from 1537 and up changed it for me. I'm not such a professional that I could explain why. It is really strange and so is the GE thing.

Most people have problems with their HD3000 NOT getting it to work without a proper GE. For using the UseKernelCache=Yes in chameleon, you must move all kext in EE to SLE by using kext wizard or any apps like that. I read from web that if UseKernelCache is enabled, then it will ignore the kext in the EE, so the move of kext is a must. And I also did it and now is ok using the UseKernelCache=Yes.If you are still on Chameleon under 1xxx, then the boot.plist filename is different.

It is still com.apple.boot.plist, but when upping to chameleon over 1xxx, the boot.plist filename is redefined to name org.Chameleon.boot.plist. I guess that your instant reboot maybe due to without renaming the boot.plist file?For the FaceTime to work properly, only the Chameleon v2.1 svn r1493 should be used, I try many, only this version can properly connected the FaceTime server and authorized.Just some experiences shared,cheers. For using the UseKernelCache=Yes in chameleon, you must move all kext in EE to SLE by using kext wizard or any apps like that. I read from web that if UseKernelCache is enabled, then it will ignore the kext in the EE, so the move of kext is a must. And I also did it and now is ok using the UseKernelCache=Yes.If you are still on Chameleon under 1xxx, then the boot.plist filename is different. It is still com.apple.boot.plist, but when upping to chameleon over 1xxx, the boot.plist filename is redefined to name org.Chameleon.boot.plist. I guess that your instant reboot maybe due to without renaming the boot.plist file?For the FaceTime to work properly, only the Chameleon v2.1 svn r1493 should be used, I try many, only this version can properly connected the FaceTime server and authorized.Just some experiences shared,cheers1.

I did all that already But I have good (?) news: wizard-like Lion started to use the cache (from time to time). I changed nothing. The problem is now: whenever it uses the cache my audio stops workingI think I've figured out why: the patched AppleHDA and dsdt fix by smartie77 injects SPDIF devices which my notebook doesn't have. When not using the cache (what means that Lion is forced to load kexts) it loads AppleHDA irrespective of the errors but with using the cache it exits.

Update I think I fixed that. Seemed to be HDMI related. I added some fixes to my dsdt and now no errors on boot anymore and HDMI Audio is shown in System Profiler.2.

Tried that Chameleon but it didn't help. Still have to use Camera Control to get a picture. Are you using Sleepenabler or not? Have you correctly edited your UHCI and EHCI devices in your dsdt for sleep (or do you get wakes by USB devices when you look into Console)?

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When I look at your dsdt, it seems you have forgotten the UHCI devices.