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Lenovo ThinkPad T420 with UEFI Only

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@goodguess -

1) TrackPoint on startup - 

yeah i don't know why the TrackPoint does not always work on cold-start. This has been happening on my T420 for as long as I can remember.  sleep/wake always works for me. on my T460, this exact same kext works 99% without issue. 

 

2) Tap to click works - if you set it the TrackPad Preferences 1st tab.

 

@Tophaholic

what happens if you eliminate IntelBacklight.kext?

you could try the config.1600x900.plist - edit it and set DualLink = 0. this one will inject a different EDID to see if that make a difference. 

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2) Tap to click works - if you set it the TrackPad Preferences 1st tab.

 

@Tophaholic

what happens if you eliminate IntelBacklight.kext?

you could try the config.1600x900.plist - edit it and set DualLink = 0. this one will inject a different EDID to see if that make a difference.

Issue resolved. I just wiped out the EFI folder on the HDD and replaced with the EFI folder in your build package. I think something messed up when I installed the latest clover package. All is good now. Thanks for all the support!

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Just in case it is of interest for anyone. Updated my sister´s (my old) T420 with a Intel Core i7 2720QM 2.2GHz Quad. 

 

Temperatures at idle is 36-40º C

Never exceeded 91º C at intensive use

 

Used artic clean thermal remover, surface purifier and Silver 5

post-355016-0-54420100-1483533587_thumb.jpg

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Just in case it is of interest for anyone. Updated my sister´s (my old) T420 with a Intel Core i7 2720QM 2.2GHz Quad. 

 

Temperatures at idle is 36-40º C

Never exceeded 91º C at intensive use

 

Used artic clean thermal remover, surface puriface and Silver 5

Hi trifero!

 

What was the previous CPU and what temps did you get with that one?

Thanks.

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Thanks for your benchmarks!

I was thinking of a 2720QM the other day. May I ask how much cash you had to throw for it?

 

From the days of my MacII I learned that one would hardly notice a cpu upgrade in everyday work unless you would roughly gain the double benchmark wise.

A 2720QM is worth a thought it seems. (Hope this won't spoil second hand prices totally now.)

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goodguess, my pleasure. It´s even more noticeable if you use virtual machines, as my sister does, as you can assign x2 “cpu” to them.

 

Took me not more than an hour.

post-355016-0-64630300-1483548837_thumb.jpg

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Agreed, thats a reasonable price. I don´t see anything similar either except from Latvia or so.

And I kind of hesitate to buy from "foreign" countries.

That and my T420 would be mostly just "waiting faster" thinking of the tasks I throw on it. :)

 

Nice specs tluck, Skylake-U may be the way to go once some affordable leasing returns show up.

Can you still read the forum postings at 1920x1080, fourteen inch? (just kidding)

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yeah! double the performance is pretty good. especially for the price - they seem to be about $75 US on eBay. i have moved on to focus on my T460 right now.

Hey tluck!

 

Does that mean we'll soon lose your support for the T420?

How's the T460 doing with macOS?

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no such luck  :wink_anim: My 8yr old son is still using a T420 ... and I will keep my T420 around for a backup. 

my T460 has a decent full HD LCD.  but since I replaced my T420 orig LCD with a Glossy LG LCD, that screen is much better! seems brighter and whiter. and i prefer 1600 vs 1920 native res on 14inch screen!

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HD300 software "upgrade"?

As many here are using the unlocked T420 BIOS, did anybody manage to assign 512MB RAM to the HD3000?

There is a setting for it in UEFI/BIOS, but I´m clueless how to tell the OS to grab 512MB instead of 384.

Could be a Clover tweaking as well.

Just curiosity on my side, whether 512MB would somehow better things compared to 384.

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HD300 software "upgrade"?

As many here are using the unlocked T420 BIOS, did anybody manage to assign 512MB RAM to the HD3000?

There is a setting for it in UEFI/BIOS, but I´m clueless how to tell the OS to grab 512MB instead of 384.

Could be a Clover tweaking as well.

Just curiosity on my side, whether 512MB would somehow better things compared to 384.

Upgrade your RAM to 8GB

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HD300 software "upgrade"?

As many here are using the unlocked T420 BIOS, did anybody manage to assign 512MB RAM to the HD3000?

There is a setting for it in UEFI/BIOS, but I´m clueless how to tell the OS to grab 512MB instead of 384.

Could be a Clover tweaking as well.

Just curiosity on my side, whether 512MB would somehow better things compared to 384.

 

Or better, to 16GB.

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@goodguess - here is a clover kext patch that give you 512MB with 4GB of memory - I do this on my son's box that only has 4GB

<dict>
    <key>Comment</key>
    <string>HD3000 384 to 512</string>
    <key>Find</key>
    <data>
    x0W8AAAAGA==
    </data>
    <key>Name</key>
    <string>AppleIntelSNBGraphicsFB</string>
    <key>Replace</key>
    <data>
    x0W8AAAAIA==
    </data>
   </dict>

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Many thanks for your guide!

 

After having converted two Lenovo X220's (without any troubles following the instructions at http://x220.mcdonnelltech.com),I now started converting my own T520, following this guide, since the hardware seems to be nearly identical. As with the X220, I got a BIOS with removed whitelist, and replaced the WiFi with a Dell 1510. Installation was easy thanks to the provided files, thanks again!

 

Only place where I had to get away from the tutorial was where it came to the screen resolution - I renamed config.1600x900.plist, but updated it inside to 1920x1080 (using the standard plist editor on my iMac, replaced resolution in two places).

 

Now the T520 is up and running, with just a "tiny" but highly visual problem: my desktop appears multiple times on my screen!

Clover is showing 1920x1080, the monitor system settings do show 1920x1080 as well, and switching resolutions will only switch resolution in their existing "frame".

 

post-1940124-0-35637900-1483651809_thumb.jpg

 

Any idea what I can do about this would be quite welcome :)

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@CCRDude - the difference between the config.1600 and config.1366 files are 2 things:

 

1) 1600 = injects a custom EDID to fix a problem with bios T420 EDID

2) 1600 = has DualLink =1

 

so restart start with the 1366 config and then if you need DualLink=1 edit and reboot.

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Could anyone please tell me how do I go about removing the whitelist from bios on a T430? I like the laptop but can't seem to do anything with it yet because of the whitelist. Also if this guide for the T420 is identical in order to get the OS to install on the T430? Thanks in advance guys.

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Thanks for the ultra fast answer, tluck!

 

I copied the 1366 config. but only got what I also had when booting from my X220 pre-configured USB stick. I get the left half of the desktop filling my whole screen, with some psychedelic colours:

 

post-1940124-0-71210200-1483652942_thumb.jpg

 

post-1940124-0-51253300-1483652947_thumb.jpg

 

(btw, the 1920x1080 resolution works fine from Windows boot stick and Ubuntu boot stick, so I'm sure the display specs are correct)

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@CCRdude - so now that you removed the bogus EDID from the 1600 config, you probably need change DualLink=0 to DualLink=1

 

@Blaggah - T430 bios - prolly need find one at the T430 guide or from Bios-Mods.com? most of the steps are the same except not all kexts will work - for example Audio and GFX will be different.

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Is there a T430 guide on here? I'd love to take a dab at it soon. The laptop is just there collecting dust.

No, but you can take reference on here. I still have the files for the T430, including the modded bios file. For bios mod, you have to use external programmer to mod it though

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no such luck  :wink_anim: My 8yr old son is still using a T420 ... and I will keep my T420 around for a backup. 

my T460 has a decent full HD LCD.  but since I replaced my T420 orig LCD with a Glossy LG LCD, that screen is much better! seems brighter and whiter. and i prefer 1600 vs 1920 native res on 14inch screen!

 

Thanks for your continued support tluck!

I also prefer the 1600 over the 1920 resolution LCD at 14" screen size. My company Dell machine is at 1920 and it's very tiring to look at.

I guess you forgot to reply to my question about how does Sierra perform on the T460. Was the intentional? :) I'm truly interested.

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      Credits: RehabMan, Shmilee, vusun123, TimeWalker, Mieze from which, much of their work and help is/was was used to get the T460 to this point.
      Devices and aspects working:
      Ethernet -  Intel I219LM is enabled via IntelMausiEthernext.kext WiFi/BT - substitute the Intel WiFi/BT with a compatible Broadcom or Atheros chip Audio - ALC293 codec implemented via AppleALC.kext (the old AppleHDA_ALC293 and CodecCommander kexts are not needed) PS2 - ClickPad + TrackPoint + all 3 buttons - using a modified VoodooPS2Controller to support new layouts - and added some custom Fn key maps based on 440/450 dsdt USB - implemented via custom SSDT + USBInjectAll kext. All USB3/USB2 ports are intel-based and work -  3 external USB and internal Camera, BT, etc  Sleep/Wake - the sleepwatcher package and custom sleep/wake scripts are used to help with sleep/wake for BT and PS2 devices. Note: have not tried to implement the SD card reader - no driver found.
      ACPI Files
      New Installation - Steps and Details
      Part 1 - OS Installation
      Part 2- Post OS Installation and Setup
      Notes on Custom Kexts
       
    • By Jancey
      I used this command: diskutil info disk0s2 | grep -i "Partition UUID" | rev | cut -d' ' -f 1 | rev

      But I accidentally removed the wrong disk and now my main windows drive is not appearing in the bootloader. I can't figure out how to get it back. I tried resetting my windows drive, but I kept getting an error. I also reset my mac and reinstalled Catalina.
    • By gengstapo
      @Hervé
       
      Im having similar issue with my HS setup, dell latitute 3480, i5-7200U
      Once the hdmi plugged in, the laptop display went blank, only could see the external tv
      But, when i put my laptop to sleep & wake up again, both screen got display (hdmi still connected)
      Even the hdmi could be plugged off & in (after sleep), the laptop display is fine
       
      What could be the culprit?
      Dell’s MacBook Pro IORegistry.zip
      config.plist.zip
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