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jloisel / t440p

Thinkpad T440p Hackintosh (macOS Mojave 10.14.x / Catalina 10.15.x) - Clover config.plist + kexts
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Can't get 4k out of mini displayport #30

Closed pangklee closed 4 years ago

pangklee commented 4 years ago

Output appears to be maxed out at 1080p under Mojave. 4k output works on windows and linux.

tiltroom commented 4 years ago

@pangklee Did you manage to get a fix for this?

pangklee commented 4 years ago

@pangklee Did you manage to get a fix for this?

I did not. Tried updating to Catalina and still running into the same situation, resolution maxes out at 1080

tiltroom commented 4 years ago

@pangklee Did you manage to get a fix for this?

I did not. Tried updating to Catalina and still running into the same situation, resolution maxes out at 1080

Do you by any chance use an internal 1080p panel?

I also have an X1 carbon running Catalina and it also has this issue with external monitors but I realized the X1 can output up to 2560x1440 which coincidentally is the same resolution as the internal panel. At this point, I believe it's either an OS limitation or a Whatevergreen.kext thing

tiltroom commented 4 years ago

I've managed to get 4K@60 over mini display port by adjusting the BIOS "Boot Display Selection" to "Digital on ThinkPad", at this point the internal LCD was disabled and my external monitor was boosting the full resolution

pangklee commented 4 years ago

I've managed to get 4K@60 over mini display port by adjusting the BIOS "Boot Display Selection" to "Digital on ThinkPad", at this point the internal LCD was disabled and my external monitor was boosting the full resolution

Yeah I’m using an internal 1080p panel. It’s def an issue with whatevergreen not patching the graphics correctly for mobile chips... i can do dual display (internal 1080, external 4K) no problem running win10 or a few different flavors of Linux.

jloisel commented 4 years ago

That's a compromise you have to accept. The people contributing to those open-source projects, which enable you to install macOS on third party hardware, are doing it for free on their spare-time.

Should you have tried building an hackintosh just 5 years earlier, and you would have experienced much more pain. The community and the tools around it definitively improved a lot. Sure, some things are still broken. But, overall, i'm quite happy with the result. It's not perfect, but it's not awful either.