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Awesome! Pic of the build? I'm back on the T440P too. It's just so comfortable to type on a mechanical keyboard with the Thinkpad Trackpoint on macOS.

I have the same with the 4910MQ and it gets a bit warm, but tolerable. Absolutely shreds most tasks. I'm thinking of undervolting the CPU a little. Could you share your VOLTA settings?

Is everything working on Big Sur?

Will test it out

Did you update the values in the config? Install Mojave first.

I've already posted my EFI. Big Sur isn't something I'm interested in for now - I would rather have a stable OS. If there ever is a real reason to upgrade, it will be through Opencore.

...and then failed again. :banghead: @endoudaiki Can you share the exact steps you are using to get this working?

...and then failed again. :banghead:

If anyone still has distortion using their headphone jack, this fixed it for me on Mojave 10.14.6 (to be tested on Catalina) https://github.com/jardenliu/ALC298PlugFix

You the man! This looks to have solved the distortion

Tried it, but looks to be a different codec to my machine. :wave:

Did Sniki's update solve it completely?

I have identified a temporary fix within the OS. Select 'Line In' under System Preferences - this clears up the distortion. Sometimes the distortion comes back if you click this window away, so minimize the window while keeping 'Line In' highlighted. I am using layout-id 29. Have tried...

I played around with this again today. You can clean up the distortion by selecting 'Line In' within Systems Preferences. A temporary fix, as the input jack/headphones sometimes it goes back to distortion.

Yep, definitely selecting 'Line In' makes the headphone output clean. Sometimes it goes back to distorted signal again, but re-selecting it always fixes it.

Adding the layout-id under properties doesn't make any difference on my Lenovo X270. I already have 29 injected. What I have found in troubleshooting.... Each time the audio becomes distorted, selecting 'Line In' in System Preferences makes the audio clean again with headphones. Can someone...

I just used my posted EFI on a new x270 Catalina install - works flawlessly. However, I did spend sometime trying to work out why the copy of the OS I made to the same SSD wasn't booting. When I ran verbose, I do believe I ran into your error code. Try going to BIOS, Security, I/O port access...

I triple boot Mojave, Catalina and Windows 10 on the 7300u. I don't imagine there would be any difference with the 7200u CPU. Both are Kaby Lake. Take a look at my EFI on the Mojave thread.

I dual boot Mojave and Catalina and can confirm the card works for wifi and bluetooth on both OS. It should run natively. Use the kexts in my EFI here: https://www.tonymacx86.com/threads/x270-catalina-time-for-optimization.288150/post-2086151

@P420394M You ok to have @Feartech split out this issue into the Mojave forum so we can troubleshoot it there?