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Kogen Mantis

Lenovo ThinkPad T420 with UEFI Only

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Look at the W520 DSDT files I posted a while back, there should be some info that might interest you

I found it but after putting it in EFI/CLOVER/ACPI/Patched I get a kernel panic upon boot.

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@kanabiol - ah yes - i see what is going on. sorry.

-- the EDID data is injected anyway - i will remove the EDID from the 1368 config.plist - i seem to recall this is a clover bug in some versions - meaning it will inject it even if Inject EDID = false.

 

ill redo the zip package shortly.

 

Thank you very much for the work you are doing. Make install from scratch, everything worked perfectly!

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Take it as reference, not using it

I figured, but I'd really appreciate it if you could provide a little more info.

I've never worked with DSDT patches or manual patching before.

 

I understand that I should take some "code" from your DSDT and put it into mine to get everything working, correct?

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i am not 100% sure there is anything in that DSDT that would address your issue - brightness for NON-intel - i.e. the Nvidia card.

the current zip file contains IntelBacklight.kext that is for integrated IGPU (intel GFX).  there is an alternative approach that used ACPI to control brightness - that may be of interest. 

 

you still need to have the PNLF device in DSDT (and some other coding )

and then use ACPIBacklight.kext instead of intelBacklight.kext.

the t420 had this method along time ago.

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Fellows, I have a somewhat off topic issue.

I grabbed an almost pristine T420 from fleabay which has BIOS 1.4.9 on it sadly.

I learned from Mr. Goggle that it is possible in theory to downgrade to 1.4.6 using a bootable thumb drive with BIOS and flash exe on it.

However I have hit a wall as I´m clueless how to extract the needed files from the 1.4.6 BIOS upgrade ISO. Linux and eltorito are the key words here.

Files on the BIOS ISO are invisible in any way I´m aware of.

 

Is anybody here willing and able to create an image of such a thumb drive with the needed files on it?

I could provide a DOS bootable thumbdrive image and the BIOS ISO if that would help.

 

Thanks for caring!

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@galaretka - i posted a new zip with El Cap version of the VoodooPS2Controller so CapsLock works (again)

@x4080 - there are only so many gestures implemented - 4 fingers is not one of them.

@goodguess -

 

i found this script a while back when i was looking at thinkpad ISOs for some reason or another at this link.

the phython code is below and it will extract the "invisible" files. it may be helpful as it can run on your hack to extract/create a bootable flash drive.

 

eltorito-iso-extract.py

#!/usr/bin/env python
import struct
import sys
SECTOR_SIZE = 2048
def find_image(fp):
    # el-torito boot record descriptor
    fp.seek(0x11 * SECTOR_SIZE)
    data = fp.read(SECTOR_SIZE)
    assert data[:0x47] == b'\x00CD001\x01EL TORITO SPECIFICATION' + b'\x00' * 41
    boot_catalog_sector = struct.unpack('<L', data[0x47:0x4B])[0]
    # check the validation entry in the catalog
    fp.seek(boot_catalog_sector * SECTOR_SIZE)
    data = fp.read(0x20)
    assert data[0:1] == b'\x01'
    assert data[0x1e:0x20] == b'\x55\xAA'
    assert sum(struct.unpack('<16H', data)) % 0x10000 == 0
    # Read the initial/default entry
    data = fp.read(0x20)
    (bootable, image_type, load_segment, system_type, sector_count,
     image_sector) = struct.unpack('<BBHBxHL', data[:12])
    image_offset = image_sector * SECTOR_SIZE
    if image_type == 1:
        # 1.2MB floppy
        image_size = 1200 * 1024
    elif image_type == 2:
        # 1.44MB floppy
        image_size = 1440 * 1024
    elif image_type == 3:
        # 2.88MB floppy
        image_size = 2880 * 1024
    elif image_type == 4:
        # Hard disk image.  Read the MBR partition table to locate file system
        fp.seek(image_offset)
        data = fp.read(512)
        # Read the first partition entry
        (bootable, part_type, part_start, part_size) = struct.unpack_from(
            '<BxxxBxxxLL', data, 0x1BE)
        assert bootable == 0x80 # is partition bootable?
        image_offset += part_start * 512
        image_size = part_size * 512
    else:
        raise AssertionError('unhandled image format: %d' % image_type)
    fp.seek(image_offset)
    return fp.read(image_size)
if __name__ == '__main__':
    with open(sys.argv[1], 'rb') as iso, open(sys.argv[2], 'wb') as img:
        img.write(find_image(iso))

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Wow tluck, that really looks like a place to start from and may be the solution for all those 1.49 crippled T420 out there.

The sellers at fleabay usually say that downgrading BIOS is not possible.

 

Seems there is to do some footwork still with Python and El Cap and I´m afraid this thing is above my head. :(

Syntax errors with Python 3.5 - similar issues with the built in 2.7. Would have been a miracle if it was that easy.

 

PY-Errors.rtf

PY-Shell-Errors.rtf

 

Edit: The CD I´m using as source is 83uj28us.iso

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It appears that the _kext-install.command script is missing from the 12/2 zip.   Or it's at least not in the normal /T420/EFI/CLOVER/Kexts location.

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@goodguess -

 

i was able to download and extract the guts of the 83uj30us.iso with this eltorito tool.

 

$ eltorito-iso-extract.py 83uj30us.iso 83uj30us-extract.iso

 

post-954945-0-29631300-1480822690_thumb.png

 

get the extract iso here

 

 

 

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I figured, but I'd really appreciate it if you could provide a little more info.

I've never worked with DSDT patches or manual patching before.

 

I understand that I should take some "code" from your DSDT and put it into mine to get everything working, correct?

Search for NVCAP in the DSDT, find the Device that contains it, start from there

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Thanks a lot for taking a plunge into eltorito, tluck.

I´ll put the files together on a DOS boot stick to try whether pflash does handle the 1.49 BIOS on my "new" T420.

Wish me luck that I won't end up with a big black bookend. ;)

 

Edit: Success!

All went well and I can´t thank you enough that this was made possible by your work.

I had been thinking of returning the T420 to the seller as 1.49 would have been a no go.

Would have been sad to see it go with 4/120GB, WWAN, smartcard reader, no signs of wear, docking station and bag for EUR 230.

Quite a nice testing ground for Sierra, 4GB is not too much, but maybe I´ll make it 6GB for both T420.

 

I´m uploading an image of my thumb drive right now, hoping that someone may find it useful.

Included is a USB image tool for Windows to read/write USB sticks.

I wrote a how to which is on the USB stick, together with the text  editor TE for DOS.

maybe not the most elegant writing, but here it is.

 

READ_ME.txt

Erratum: Viewing the file from the Mac side, I found a weird character in the PFLASH command.

The correct input is: "PFLASH /sa B146.FL1" with a blank (space) behind /sa.

sa stands for skip all (BIOS) checks here, BTW.

 

The thumb drive image is available from Mega.nz, feel free to improve it.

 

The DL is 800MB, mainly zero bytes, as the whole data content is merely 30MB.

I already took the smallest thumb drive (1GB) I could find. :(

I´m not aware of creating a smaller image file in Windows.

 

Regardless of the contrary told at many sites, a BIOS downgrade of a T420 is possible and not too hard to achieve.

If you are located in the EU and are tempted to buy one, this seller can be recommended -

presuming the ThinkPad is in good as new condition like mine : http://stores.ebay.de/jereist/_i.html?_nkw=T420&submit=Finden&_sid=29150972

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@tluck Today came to work, the second monitor connected via VGA, but it does not work. Prior to this, always after connecting everything worked. With what may be due cause. I tried to restart the laptop, try to turn off and turn on. Lenovo T420.

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Hey tluck!

 

Do you remember when you and I figured out that the í and 0 keys are swapped on the keyboard and you've implemented some changes (changing to ANSII maybe?) that solved the problem?

Today I've installed Sierra on my friend's T420 and on his machine these keys are swapped incorrectly :( So "0" key is next to left shift instead of being on the left side of the "1" key. On my machine the keys work fine...

How could this be?

 

Another thing. His machine has a 2540m CPU while mine has 2520m. His fan can run on 2000 RPM flawlessly and he has much lower temperatures.

In HW Monitor my heatsink is around 51 C degrees (124 F), while his is around 43 C (110 F)... That's a huge difference. I checked and he has a different heatsink, although looks the same. The FRU of his heatsink is 04W0627. Both systems were running in idle mode as much as possible, I was constantly checking in Activity Monitor.

I remember you also get 2000 RPM fan speed on idle mode. Do you think you can check the FRU on your heatsink as well to confirm if this is really the key to the lower RPMs?

 

Thanks.

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@kanabiol - hmm no idea? are you using the standard DSDT and config.plist - which defines model as MBP8,1. there is a kextpatch to add VGA port.

 

@somez - LOL -  well no idea on keyboard thing! keyboard kext is compiled with ANSI default  - on mine `i is next to  1 key for Hungarian layout. 

 

post-954945-0-58525100-1481041247_thumb.png

 

on temps - have you replaced the grease under the heatsink to get better heat flow? if it is dry it may not conduct heat as well. will check my FRU when i can shutdown.

 

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@kanabiol - hmm no idea? are you using the standard DSDT and config.plist - which defines model as MBP8,1. there is a kextpatch to add VGA port.

 

 

After a couple of reboots and turn off the VGA cable, as a result of the monitor is connected. But after turning off the monitor appears connected, although physically it is disabled

 

76f493f8a346d775aeb95ad8ada0cf16.png

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well sounds about right -  VGA is passive and not dynamic so the system does not really know if a VGA monitor is attached or not. I bought a DisplayPort to VGA adapter which will allow for dynamic detection. 

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@kanabiol - hmm no idea? are you using the standard DSDT and config.plist - which defines model as MBP8,1. there is a kextpatch to add VGA port.

 

@somez - LOL -  well no idea on keyboard thing! keyboard kext is compiled with ANSI default  - on mine `i is next to  1 key for Hungarian layout. 

 

attachicon.gifScreen Shot 2016-12-06 at 11.22.29 AM.png

 

on temps - have you replaced the grease under the heatsink to get better heat flow? if it is dry it may not conduct heat as well. will check my FRU when i can shutdown.

 

I see the same keyboard layout in preferences but it works differently despite the layout shown.

 

Regarding temps, yes I have applied a new paste a few months ago. I plan to take the machine apart and check if there is any dust blocking the vent exhaust.

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Just to let the community my case.

 

I got this laptop for a Visual Studio Project, because I had only a Macbook Pro Retina

Lenovo T420i (Mexican Laptop) with ñ keyboard (Mexico Style)

Core i5 2520m, 8GB RAM, SSD, Intel 3000 HD (integrated)

Got this laptop for around $150 with bad battery, got new battery extended for $50 and profit.

1 year passed and I finish my project, Trade my MacBook Pro Retina for an Alienware 17 and then I was Macless and don't want to bother with the alienware because of Optimus and my desktop is compatble but I didn't want to bother with my long-term PC. So this laptop was the option for my OSX alternative.

I had the bios with 1.43, one day before trying to hackintosh I upgrade the bios to 1.49, then I realize my problem, after that I downgrade to 1.46 latest modded bios. I got a second hand Atheros Ar5bhb92 (because I don't want to use any kext, and this work oob) for less than $5 shipping included (thank mexico!) and start my journey to this. (I tried before hackintosh like 3 times but never did it like I really want.

 

I did my "own" way of doing this since I got problems so, the first thing is that my two 8gb sticks had problems with clover (it says that I don't have enough space) so I used another one of 64gb. Made my USB Boot with Unibest (Selected sierra) that installed clover, then remplace clover files with the one attached here, Passed boot startup, installed sierra, installed clover on HDD, everything good so far and with better performance than my old MacBook Pro Retina 2014.

 

Installed updated, homebrew and stuff.

 

So far, the only thing not working are the bright keys (up down) and that my keyboard it's mexican spanish with a lot of keys moved so even spanish don't help at all but I can live with that.

 

I did this in 3 nights so I feel really happy about it.

 

Thank you!

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tluck,

 

I was thinking more about this CPU temp/fan issue. And 2 things popped up:

1. Could it be I have a faulty temp sensor in the machine?

2. On my friend's machine I was monitoring the "CPU pack average" value and most of the time it was able to go below 1 GHz. In my case values under 1 GHz are rarely seen or almost never. I've run the SSDT generation script on both machines. Is there a way I can confirm that my machine can use all the CPU power states it's capable of? I'm starting to think it does not go to low level power mode or something like that.

 

Thanks.

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@OscarS - great story. glad everything is working out for you.

 

@Somez- do you have the modded bios where you can change the thermal settings? are they the same settings?

do have the same HD in each machine. a SDD runs a lot cooler. idle while writing this the CPU temps range from 41-44C (106-108F).  the FAN is running around to 1958rpm. 

my son has same computer but his runs a lot hotter for some reason.

post-954945-0-16574900-1481160294_thumb.png

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@OscarS - great story. glad everything is working out for you.

 

@Somez- do you have the modded bios where you can change the thermal settings? are they the same settings?

do have the same HD in each machine. a SDD runs a lot cooler. idle while writing this the CPU temps range from 41-44C (106-108F).  the FAN is running around to 1958rpm. 

my son has same computer but his runs a lot hotter for some reason.

attachicon.gifScreen Shot 2016-12-07 at 8.27.26 PM.png

@OscarS - great story. glad everything is working out for you.

 

@Somez- do you have the modded bios where you can change the thermal settings? are they the same settings?

do have the same HD in each machine. a SDD runs a lot cooler. idle while writing this the CPU temps range from 41-44C (106-108F).  the FAN is running around to 1958rpm. 

my son has same computer but his runs a lot hotter for some reason.

attachicon.gifScreen Shot 2016-12-07 at 8.27.26 PM.png

Thermal settings in the bios? I haven't seen that. There is something like "balanced" and "max performance", but nothing more. What do you have?

 

Both of us have nearly identical ssd and hdd in optibay. Their temps are also the same.

 

post-1647866-0-66888100-1481198786_thumb.png

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      - Name: HD, Format: APFS and Scheme: GUID Partition Map

      Close Disk Utility.
      
      Select "Install macOS", then Continue.
      Follow instructions in screen.

      After install

      After first part install the system will reboot. Maybe you have to press F12 again and select the flash drive.
      
      The second part of the installation will begin. This will take 16 minutes.
       

      Post installation

      Install bootloader
       
      When the second part of install finish, the system will reboot again.

      After performing the user initial setup and go to the desktop, you need to install Clover on internal disk.

      Open the Clover installer inside flash drive that you copied before.

      Use same options above but choose the system partition this time.

      Now you need to replace the config.plist inside your destination disk EFI parittion with config.plist inside flash card EFI partition.

      The flash drive EFI partition is unmounted. Mount with terminal "sudo diskutil mount /dev/rdiskXs1". To know what X is, use "diskutil list", most likely is 1.
       
      Last step
       
      Copy all Kexts from flash drive to /Library/Extensions, with those commands in Terminal:
      sudo cp -R /Volumes/EFI/EFI/CLOVER/kexts/Other/* /Library/Extensions/ sudo chmod -R 755 /Library/Extensions sudo chown -R root:wheel /Library/Extensions sudo kextcache -i / Restart the system.
       
       
      It's done!
       
       
      Updates
       
      System update 10.14.3
       
      - Updated with success;
      - Everything works perfectly after reboot;
       

       
       

       
      And last but not least
       
      I would like to thank the following community members, by making these dream possible:
      @crushers, @snatch, @apianti, @blackosx, @blusseau, @dmazar, @slice2009, @autumnrain, @phpdev32, @EMlyDinEsH, @RehabMan, @Scellow, @mitch_de, @Shailua, @Andy Vandijck, @maxfierke, @ArturXXX, @LexHimself, @brumas, @Shiki and all others members involved directly or indirectly.
       
       
       
       
       
       
      32MB_DRAM-prealloc_config.plist.zip
      128MB_DRAM-prealloc_config.plist.zip
      SSDT-L440.aml
      VoodooHDA.kext.zip
      AppleHDADisabler.kext.zip
    • By Reel
      All work except camera
      You need SwitchResX that the screen does not freeze
         


    • By RougeOne
      Budget Workstation MacOS 10.14.1 build: z370 AORUS Gaming 5 - i5-8600K - RX 580 - UHD 630
      flawless iGPU/dGPU integration, fast FCPX editing/rendering, great overall performance for ~$1200 / ~£1000
       
      Update: updated WhateverGreen and Lilu, then updated OS to 10.14.3 and everything is fine! Even iMessage, which previously I hadn't been able to make work, is now working - possibly the update flushed the NVRAM?
       
      I'm gonna come straight out and admit it - I used newb tools which are considered taboo on InsanelyMac, and so this isn't so much an installation guide as it is a green flag to anyone considering the same hardware. My first and previous Hackintosh project was just over ten years ago and this site was massively helpful, so this is my (very small) way of giving back.
       
      EFI DIRECTORY
      http://s000.tinyupload.com/index.php?file_id=97606131925137056003
       
      HARDWARE
      CPU: Intel i5-8600K 3.6GHz hexacore (contains UHD 630 iGPU)
      CPU Cooler: be quiet! Pure Rock Slim (no paste needed, and fan facing front)
      Mobo: GIGABYTE z370 AORUS Gaming 5 (WIFI)
      RAM: 1x 8GB CORSAIR Vengeance LPX C16 2666MHz (in first slot)
      GFX Card: Sapphire RX 580 NITRO+ SE
      SATA: used ports 0, 1, 3, 5 (HDD problems when connected to port 4)
      HDD: generic
      DVD Drive: generic
      PSU: EVGA 500W Semi Modular (but you should get 650W!)
      Case: CoolerMaster CM590 III
      Fans: 2x stock case fans (one sucky on front, one blowy on back), 3x be quiet! BL046 120mm fans (two blowy on top, one sucky on front). Airflow near-perfectly balanced.
       
      ADVICE
      With the Clover configuration, you want to pay close attention to all things relating to graphics. There are some specific settings for ACPI, Boot, Devices and Graphics which should be copied exactly in order to get the iGPU and dGPU to work in perfect harmony. For instance, make sure you use ig-platform-id 59120003 rather than 59120000 if you want FCPX to be usable. With the right settings, FCPX will not only run, but run flawlessly.
       
      I was not able to figure out how to make NVRAM/PRAM behave itself, and I got errors when I tried to issue relevant commands. As a result, I could not at first get iMessage to work properly. It worked once on my first installation attempt but not from subsequent attempts. This Clover configuration therefore has no consideration whatsoever toward iMessage reliability - however, iMessage ended up working somehow, anyway - I noticed it after I'd updated to 10.14.3 but this may just have been coincidence.
       
      Onboard WiFi does not work. There is no driver for it. I'm using wired ethernet to a bridge router as it was cheaper than getting a compatible PCI card.
       
      Audio is working well after I installed the z370 audio patch, then the ALC1220 codecs, then AppleALC.
       
      With kexts for generic 3rd party SATA and generic 3rd party eSATA, my HDDs and DVD drive work perfectly well.
       
      Sleep/Wake functions run perfectly. iCloud functions run perfectly. Shutdown leaves the mobo LEDs on, annoyingly.
       
      My USB 3 ports seem to suffer from low power output, and I don't know why.
       
      Overall, this system appears to run about as well under MacOS 10.14 Mojave as it does under Windows 7. I would solidly recommend this build to anyone looking to build a computer for workstation purposes, on a budget.
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