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Lenovo ThinkPad T420 with UEFI Only

K0gen

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tluck
tluck
Posted
Posted

@goodguess. seem like the ACPIsensor was the reason for KP? can remove it if you still have issues - its a non-essential  fakesmc plugin 

 

@somez - here is another idea to fix graphics issues with High Sierra. I was getting some black lines so I have reverted the Graphics Kexts to the Sierra versions. so far no issues.

$ ls -ld /Library/Extensions/AppleIntel*
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000Graphics.kext
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsGA.plugin
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsGLDriver.bundle
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsVADriver.bundle
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelSNBGraphicsFB.kext
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelSNBVA.bundle

so to make these load instead of the standard ones, i edited the Info.plist and changed all the versions from 10.x.x to 100.x.x

$ kextstat |grep -i graph
   93   14 0xffffff7f824b1000 0x49000    0x49000    com.apple.iokit.IOGraphicsFamily (519.13) 0C5824DB-F0E8-3C89-90FF-32400837361C <12 7 5 4 3 1>
   99    0 0xffffff7f82531000 0x2e000    0x2e000    com.apple.driver.AppleIntelSNBGraphicsFB (100.0.2) 4651D99C-251F-319C-A742-FE237C8CD3A3 <93 12 11 7 6 5 4 3 1>
  120    3 0xffffff7f8293a000 0x9000     0x9000     com.apple.AppleGraphicsDeviceControl (3.18.44) 02233606-BC28-33FA-AB6F-7D86206B8394 <93 12 7 6 5 4 3 1>
  122    0 0xffffff7f82948000 0x63000    0x63000    com.apple.driver.AppleIntelHD3000Graphics (100.0.2) BF52C5F1-7F69-35F4-935F-3F5F237AC46C <93 12 7 5 4 3 1>
  128    1 0xffffff7f82bc0000 0x3000     0x3000     com.apple.driver.AppleGraphicsControl (3.18.44) 6EA0D4AD-6E3C-37F3-B2EA-13FE0F7B8545 <7 5 4 3 1>
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Somez
Somez
Posted
Posted

 

@goodguess. seem like the ACPIsensor was the reason for KP? can remove it if you still have issues - its a non-essential  fakesmc plugin 

 

@somez - here is another idea to fix graphics issues with High Sierra. I was getting some black lines so I have reverted the Graphics Kexts to the Sierra versions. so far no issues.

$ ls -ld /Library/Extensions/AppleIntel*
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000Graphics.kext
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsGA.plugin
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsGLDriver.bundle
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelHD3000GraphicsVADriver.bundle
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelSNBGraphicsFB.kext
drwxr-xr-x  3 root  wheel  96 Apr 14  2017 /Library/Extensions/AppleIntelSNBVA.bundle

so to make these load instead of the standard ones, i edited the Info.plist and changed all the versions from 10.x.x to 100.x.x

$ kextstat |grep -i graph
   93   14 0xffffff7f824b1000 0x49000    0x49000    com.apple.iokit.IOGraphicsFamily (519.13) 0C5824DB-F0E8-3C89-90FF-32400837361C <12 7 5 4 3 1>
   99    0 0xffffff7f82531000 0x2e000    0x2e000    com.apple.driver.AppleIntelSNBGraphicsFB (100.0.2) 4651D99C-251F-319C-A742-FE237C8CD3A3 <93 12 11 7 6 5 4 3 1>
  120    3 0xffffff7f8293a000 0x9000     0x9000     com.apple.AppleGraphicsDeviceControl (3.18.44) 02233606-BC28-33FA-AB6F-7D86206B8394 <93 12 7 6 5 4 3 1>
  122    0 0xffffff7f82948000 0x63000    0x63000    com.apple.driver.AppleIntelHD3000Graphics (100.0.2) BF52C5F1-7F69-35F4-935F-3F5F237AC46C <93 12 7 5 4 3 1>
  128    1 0xffffff7f82bc0000 0x3000     0x3000     com.apple.driver.AppleGraphicsControl (3.18.44) 6EA0D4AD-6E3C-37F3-B2EA-13FE0F7B8545 <7 5 4 3 1>

 

Hey tluck,

 

Thanks for still trying to fix this. Could you give me more details on the steps how to do this? I get the idea, but not sure how to do it.

 

Thank you.

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bleuiko
bleuiko
Posted
Posted

I'm trying to get my T420 running Higher Sierra stable but after being logged in for about 20 minutes (and usually when I'm not actively doing anything), the OS would lock up but my mouse would still be usable; I wouldn't be able to click on anything though. It sometimes turned into the spinning beach ball but would otherwise be non-functional.

 

Anyone else run into a similar issue? I'm not sure how to log the crash if this is indeed a crash but I can post logs if someone could tell me how to record it. Any suggestions?

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Somez
Somez
Posted
Posted

I'm trying to get my T420 running Higher Sierra stable but after being logged in for  about 20 minutes (and usually when I'm not actively doing anything), the OS would lock up but my mouse would still be usable; I wouldn't be able to click on anything though. It sometimes turned into the spinning beach ball but would otherwise be non-functional.

 

Anyone else run into a similar issue? I'm not sure how to log the crash if this is indeed a crash but I can post logs if someone could tell me how to record it. Any suggestions?

You are not alone, but we have no idea why is this happening so far :(

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bleuiko
bleuiko
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Posted

@Somez: Have you tried booting into safe mode? One of the articles I came across through googling my console errors show resolution when they just boot into safe mode and then back into normal mode. It did seem to resolve that particular error for me; I'm still testing to see if it freezes.

 

I don't know much about macs except as a normal users on a regular MBP; this is my first go-round with a hackintosh so forgive me for probably some stupid suggestions.

 

For another one of my console errors, I came across this (below); not sure if that is causing issues with kexts.

 

User-Approved Kernel Extension Loading

macOS High Sierra 10.13 introduces a new feature that requires user approval before loading newly-installed third-party kernel extensions (KEXTs). When a request is made to load a KEXT that the user has not yet approved, the load request is denied. Apps or installers that treat a KEXT load failure as a hard error will need to be changed to handle this new case.

 

https://developer.apple.com/library/content/technotes/tn2459/_index.html

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Somez
Somez
Posted
Posted

I haven’t tried booting into safe mode yet. I’m waiting for updates to come out, hoping they will eventually solve this problem.

 

I’m also not an expert of hackintoshing. I’d used many Macs before and in fact we’ve just bought an Air to my wife as it was on sale in Hungary. However buying another one for me as a hobby does not justify the price so I stick with the T420.

 

In fact I just basically follow the instructions here created by tluck. He is the expert and the heart of this topic :) “Unfortunately” as I understand so far he does not suffer from the freezing issue which obviously makes finding the root cause and the fix harder.

 

I’m also considering the option to do a clean install of high sierra because my existing installation is an upgrade from Sierra.

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bleuiko
bleuiko
Posted
Posted

@Somez: Booting into safe mode is pretty easy so I would suggest trying that before the clean install; however, a clean install is often a good idea if I've learned anything from my Windows days. Here is the article that gave me the safe mode suggestion: http://brettterpstra.com/2017/10/20/have-you-tried-rebooting/

 

For what it is worth, my freeze problems have seem to disappear after trying safe mode. Fingers crossed!

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jus12
jus12
Posted
Posted (edited)

Hi, I need your help.

yesterday I had to reinstall High Sierra on my T420. All is working fine with the latest Clover.zip package. But after wake from sleep my power led and sleep led on the cover keeps flashing.

Everything else works fine after sleep. I need to reboot, of course, for both leds to stop flashing.

 

Do you have ideal what can cause that? I have disabled hibernation and removed sleep image (hibernate mode set to 0).

OK I think I found the problem. For many years I had installed external disk in CD Bay instead of CD Drive. When I put CD Drive back, or just remove the external drive from CD Bay, led behaves as it should. So something is not right with the external drive sitting in the cd bay, then.

Edited by jus12
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jus12
jus12
Posted
Posted (edited)

@jus12 - hmm. strange - there is fix in the DSDT that address this issue - reset LED upon wake from sleep. so i dont know why it would still flash? i presume you have the custom DSDT in place?

 

Hi tluck, thanks for the update. Well, it is strange. I have been using your packages for years now with a great success. I have never created dedicated DSDT. I was always using yours. For my W520 I had created one but not for T420.

So all files I'm using as they are in your packs.

 

So I have tried to use DSDT files from previous (working) builds. But no change. Latest HS maybe have changed something? I'm running now 10.13.3.

Edited by jus12
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rolitab
rolitab
Posted
Posted

I would really appreciate if someone here can give the steps for downgrading from High Sierra to Sierra on T420. Should I reformat system partition and when should I do it? There are a lot of questions actually, I cannot afford experiments because T420 is the only one computer I have at the moment... Thanks everyone for help.

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tluck
tluck
Posted
Posted (edited)

@rollitab - For the T420, an OS downgrade is under the constraints or process as a real mac. so you can follow the recipes posted in a variety of locations. but most seem to involve  an erase, (clean full) install and restore of data/apps

 

what issues are you seeing with High Sierra. ?

 

somez is seeing some issues - but does  not seem to be the BRSYNC/Hang problem common with HD 3000 - seems to be a different issue. 

But on one of my systems I had some gfx/hangs with BRSYNC/VRSYNC - but since I have reverted the graphics kexts to the Sierra versions, so far so good.

 

sleep/wake ok for me. LED power light goes from slow on/off during sleep to on for wake - moon icon on lid switches to battery icon for wake.

Edited by tluck
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FireROR
FireROR
Posted
Posted

OS sierra.

 

I reinstalled the system couple months ago and finally want to connect to an external monitor.

 

The DP port on the side is not working?!!... The VGA works fine but I got some shadows.

 

I did appy the patch in the clover and use 8.1 as system. What did I do wrong?

 

Thanks

 

The second issue I found is there is no USB wake up on this laptop. Lenovo website says press the bottom is the only way to wake up the laptop. Is that true?

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tluck
tluck
Posted
Posted

@fireROR -

 

odd, the DP on my system works? i use the DP to connect to my HP monitor. what happens when you attach the DP cable? it should flash and recognize something attached?

 

not sure about USB wake. i have not tried it.  i use BT mouse and keyboard.

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verleihnix
verleihnix
Posted
Posted
On 28.2.2018 at 4:53 PM, tluck said:

But on one of my systems I had some gfx/hangs with BRSYNC/VRSYNC - but since I have reverted the graphics kexts to the Sierra versions, so far so good.

 

Could you please describe more detailed how to do this.

Thanks in Advance

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FireROR
FireROR
Posted
Posted
On 3/3/2018 at 6:52 PM, tluck said:

@fireROR -

 

odd, the DP on my system works? i use the DP to connect to my HP monitor. what happens when you attach the DP cable? it should flash and recognize something attached?

 

not sure about USB wake. i have not tried it.  i use BT mouse and keyboard.

 

Just nothing. Doesn't matter boot with DP or plugin after boot. No signal at all.

The VGA port will not put the monitor into sleep. Not sure what was wrong.

My LCD screen is 1080p but it should not relate to this issue, (I have to use another inject to get intel video card working)

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Somez
Somez
Posted
Posted
4 hours ago, zalien said:

Running Sierra, should i update to high sierra? howse the stability?

I'm having constant freezes after every like 30 minutes, but most of the people does not suffer from this since I have not seen any complaints from others.

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Somez
Somez
Posted
Posted

I don't plan on replacing the LCD, so I'm really considering the option to format and install Sierra. Especially that based on the comments almost nobody has reported the freezing issue with High Sierra and we have no clue about what is causing the freezes.

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jboeren
jboeren
Posted
Posted
1 hour ago, Somez said:

I don't plan on replacing the LCD, so I'm really considering the option to format and install Sierra. Especially that based on the comments almost nobody has reported the freezing issue with High Sierra and we have no clue about what is causing the freezes.

I also have freezing issues. As I changed the processor for another (2nd hand) one I thought it might be the processor or the ram memory. 

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