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[Guide] Lenovo Yoga C930-13IKB (4K/i7-8550u) 99% working, updated 7 Feb

Joined
Oct 31, 2014
Messages
134
Motherboard
Lenovo LNVNB161216
CPU
i7-8550U
Graphics
UHD 620 (3840x2160)
Mobile Phone
  1. Android
Short and sad update. I flashed the bios twice and somehow killed it completely. The bios chip is fine but the laptop refuses to power on at all and had that awful burning smell of a capacitor that has just popped.
I'm so sad. I really loved this laptop. Thanks navaira for inspiring me to get it and to everyone else who supported me along the way.
****. I'm so sorry to hear that :/ Do you happen to still have warranty? MAYBE Lenovo will do something for you…

I'm keeping the 48Hz for now, until someone figures out a way for lazy people to get 60Hz ;) (or until I buy the 14" Mx Macbook Pro when it comes out) I have no problems and don't notice any difference.
 
Joined
Jun 21, 2012
Messages
30
Motherboard
LNVNB161216
CPU
i7-8550u
Graphics
UHD 620 (3840x2160)
Elvisior, that is terrible news! I hope you find a decent replacement.

MrGeque when I updated to the newest version of Lilu, the computer did boot and it appeared that it was running at 60Hz, but I would need to perform tests to verify that as it no longer listed the frequency under Displays in System Reports. I'm still on OC 0.6.4 and may experiment with updating at some point to see if anything improves.
The two places the machine would hang in startup were AppleHDAEngineInput: PerformFormatChange (not an issue for whatever reason before updating WEG and Lilu) and IODisplayWrangler ('busy timeout'). I could include more code related to the long hangtime but I haven't seen anyone else with these issues and feel that I may need to improve my OC folder before proceeding.
 
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Joined
Oct 31, 2014
Messages
134
Motherboard
Lenovo LNVNB161216
CPU
i7-8550U
Graphics
UHD 620 (3840x2160)
Mobile Phone
  1. Android
I think I'm just going to keep 48Hz. I don't notice any difference at all. The laptop runs cooler and I wonder if it's related – less work for that excuse for a CPU.
 
Joined
Jun 20, 2013
Messages
92
Motherboard
Gigabyte X299X Designare-10G
CPU
i9-10940X
Graphics
Radeon VII
Hiya, got the same model and picked up the latest EFI folder by Silent99, page 12, here.

I could install the latest Big Sur no problem, directly to the original SSD. Yet, when I login I have trouble with the touchpad for some reason. When I use the left click on the touchpad on the bottom bar, it actually does a gesture swipe, the triple swipe down. So, when I click Firefox on the bottom bar, it shows FireFox' windows, rather than just opening Firefox.

Is there a way to edit the gestures, per VoodooIC, or something? I thought you would all have that set up, or is it a problem I'm facing?

What do you use to remap keyboard keys?

The macOS loading also is slowed down significantly by Busy timeout[0], (60s): 'BAT1', 'IODisplayWrangler'. I also don't see battery status.

I'm running the latest BIOS, I think 21' of January. OpenCore 0.6.8. All latest kexts.

Did anyone get Thunderbolt working? I would like to invest some time in it, when no one has yet.
 
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Joined
Oct 31, 2014
Messages
134
Motherboard
Lenovo LNVNB161216
CPU
i7-8550U
Graphics
UHD 620 (3840x2160)
Mobile Phone
  1. Android
I think the latest BIOS might be the problem :/ but let me see what I've got here.

Screen Shot 2021-04-10 at 13.58.24.png


(The SMC sensor kexts don't work, but I was too lazy to remove them, I don't like changing things that work.)

The battery status is handled by the DSDT for me, same as the trackpad. But your DSDT is going to be different, especially since you've updated the BIOS. I'm afraid you might (MIGHT) have to rip it again and reapply all my patches from the original post. I know OpenCore manual goes into great pains to explain how very much you don't need the DSDT, well, I do…
 
Joined
Jun 20, 2013
Messages
92
Motherboard
Gigabyte X299X Designare-10G
CPU
i9-10940X
Graphics
Radeon VII
Small update: I found the BAT1 fix, didn't notice it on Page 13. It reinstates battery life, the battery button in SysPrefs, the Bluetooth functionality (and SysPref) as well. It seems it fixed the power management issue as well, yes.

My remaining issues would be the trackpad malfunctioning a bit, and the occassional flickering of the screen, also related to the 48Hz refresh rate? It seems prevalent for everyone?

I managed to get the trackpad troubles down to only when I normally click (left / tap) something on the bottom app bar, it tries to show the windows of the selected app rather than opening it freshly or whatever is active. I believe it's triple swipe down, but I can't seem to turn it off. Something similar happens when in Finder and double-clicking, it tries to rename rather than open the file.

I did get trackpad settings back after fixing BAT1 as well, which is quite nice.

Update: I fixed the flickering, it seems, by choosing a different scaling resolution than 1080p (2048x1152). Still at 48Hz, regardless of the settings applied from post #127 (page 13, Mrgeque)
 
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Joined
Oct 31, 2014
Messages
134
Motherboard
Lenovo LNVNB161216
CPU
i7-8550U
Graphics
UHD 620 (3840x2160)
Mobile Phone
  1. Android
I'm on 1504x846, my old eyes prefer that. No flickering.

The trackpad, weirdly, used to have issues for me – it would sometimes stop working after sleep and I'd need to use a mouse to reboot the laptop – but they fixed themselves somehow by using @Silent99's set of files, then replacing the DSDT/SSDTs. I am not complaining, but I have no idea why it works.

Aha, I am using BetterTouchTool for right-click and I have only the bottom-right corner set (not the 1/4 of the trackpad Lenovo decided was the right solution, making me constantly right-click things without wanting to). And for key remapping I use Karabiner-Elements.
 
Joined
Jun 20, 2013
Messages
92
Motherboard
Gigabyte X299X Designare-10G
CPU
i9-10940X
Graphics
Radeon VII
I'm at a loss still why my normal left click wouldn't work on the (standardly) bottom icon bar. It just goes to the 'windows of the program' screen, not just a simple left click. Is it fixable? Where should I look?

With BetterTouchTool I don't yet understand how to segment the trackpad and add different functionality to each part.
 
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