GatorGeek

I wonder if there is any chance of Mojave running on this model laptop?

https://osxlatitude.com/index.php?/topic/5966-details-about-the-smart-touchpad-driver-features/ has some interesting values for various settings. Some of them align (more or less) with items in the Cypress panel. I've also been looking around to see if there's any possibility of swapping the Cypress touchpad for a Synaptics or Alps that is more compatible with MacOS. Can't seem to find anything that definitively says this one or that one will fit the XPS 13 L321X, though.

Anything in this post helpful for us to figure out how to tweak this Cypress touchpad into actually being useable? http://forum.notebookreview.com/threads/voila-hacked-dell-drivers-for-u300s-cypress-trackpad.665303/

Thanks Jake. I'll give that a try. PS: Sleep seems to work OK for me when Sleep-ing from the menu it wakes up when I open the lid. I notice that it does take a good minute or two to get to sleep after the menu is chosen. Suppose that's normal/expected.

I'm curious, do either of you have the brightness controls working (Fn+F4 and Fn+F5)? It's not a big deal for me, but would be nice to have. Thanks!

I'm using DW1510 Broadcom BCM94322HM8L in mine. Have to confess I've not even tested Sleep yet. Perhaps I should do that soon

You've all been very helpful, patient and kind. Please accept my sincere thanks for your assistance.

Followed your directions again tonight Jake but had no luck...just kept getting same results I've been getting. Decided to Google around to see if I could find a fresh copy of the ALC275 kext to download...thinking maybe the copy I have is corrupted. In my searches, I came across https://github.com/insanelydeepak/Patched-AppleHDA-for-Mac-OS-Sierra-10.12 which led me to download the kext for Audio ID 28 from here https://bitbucket.org/insanelydeepak/hdaenablers-applehda-for-hackintosh/downloads/ Upon installing the kext, look what happened

Yes...I restarted Also tried using Kext Wizard Same results

I also keep getting this alert Updating perms & cache doesn't seem to make it go away.

Uninstalled VoodooHDA Replace my DSDT with Jake's DSDT Copied AppleHDA_ALC275.kext to S/L/E Fixed perms and rebuilt cache with the following results locals-MBP:~ localuser$ sudo chmod -Rf 755 /L*/E* locals-MBP:~ localuser$ sudo chown -Rf 0:0 /L*/E* locals-MBP:~ localuser$ sudo touch -f /L*/E* locals-MBP:~ localuser$ sudo touch -f /L*/E* locals-MBP:~ localuser$ sudo touch -f /L*/E* locals-MBP:~ localuser$ sudo chmod -Rf 755 /S*/L*/E* locals-MBP:~ localuser$ sudo chown -Rf 0:0 /S*/L*/E* locals-MBP:~ localuser$ sudo touch -f /S*/L*/E* locals-MBP:~ localuser$ sudo kextcache -Boot -U / rebuilding //System/Library/PrelinkedKernels/prelinkedkernel kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext EAPDFix.kext KernelCache ID: 49C8B53C168CEA1F2AC096D9697E5C48 File at path '/System/Library/PrelinkedKernels/prelinkedkernel' changed, cannot be used Child process /usr/sbin/kextcache[689] exited with status 77. Error 107 rebuilding /System/Library/PrelinkedKernels/prelinkedkernel locals-MBP:~ localuser$

Aren't you using the i5 version of the L321x? I have the i7 version. I didn't think I could use your DSDT (or SSDT) files if we have different hardware/CPU configs.

Perhaps I need to redo my DSDT from scratch and retry the 275 audio kext. Which patches do you recommend?

Thanks guys. I punted to VoodooHDA last night. Audio seems to work well so far with it. I'm keen to try the Cypress touchpad kext. One question though, how do I install the prefpane? Not sure I've ever encountered one of those before.

No luck with AppleHDA275.kext