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I followed the logic on a Rehabman's post (under Brightness Keys) and used the mapping values on the VoodooPS2 repo. Here are the links to the post and the PS2 to ADB map: https://www.tonymacx86.com/threads/guide-patching-dsdt-ssdt-for-laptop-backlight-control.152659/#post-950676...

Hi! Maybe this guide can help, it has similar hardware. https://www.tonymacx86.com/threads/full-guide-dell-inspiron-15-7548-uhd-big-sur-11-2-opencore.308697/

I do have acceleration working with the 4K internal screen. Some things that might work out are: - Adding enable-max-pixel-clock-override config - Patching framebuffer - Different platform-id - Adding necessary configurations from here - Here is a post about the alternatives for cdfon (if you...

Thanks, glad to help! So let's break everything down to parts. I can't assure you that will work, each laptop has its own issues. And as for the ACPI files the correct stock ones work just great, they only add booting time (almost nothing) and unneeded code. I can only recommend installing...

The reason we need these ACPI renames are due to conflicting with Apple's own USB map. If the checked iOSService returns something, it means the device is loaded (something we do not want to avoid conflicts). Anyway, here is the link to the original post for more info...

Yes it does, under the name of Touchscreen (not pen and multitouch sensor). I haven't tested it for sleep, the main issue was battery related though. It consumes a lot of unnecessary power. I got mine working by mapping the USB and installing the Touchpad kexts as per post 3. Try to find out...

Actually no, it’s at 64mb. If I were to set it to 128mb, should I also patch the framebuffer to match those 128mb? And in that case what values would those be? I’m asking because I already tried changing the dvmt value with no success, but maybe is the framebuffer setting that also needs...

Don't quite know the full specs of your laptop, but could be the issue resolved in this post https://www.tonymacx86.com/threads/solved-guide-workaround-for-cdfon.306154/page-5#post-2210574 Try to download WhateverGreen from the repo of the post above, and add the...

No luck, same as before :cry:

Nah, I didn't post it on the first posts as I want people to create their own hack, but I won't reject the help. Here is the config.plist ;) Thanks in advance! EDIT: found an old thread with all the things I tried to achieve full resolution (unsuccessfully), maybe will help in something.

Thanks!! I don't know why the second post is disabled, there are the enable-max-pixel-clock-override patch and the link to the built WhateverGreen binary with the latest commit. Hope the moderators activate it soon! Still, even after that flag I didn't seem to be able to reach the 3840x2160...

Hi! I made a new guide for Big Sur using OpenCore, check it out https://www.tonymacx86.com/threads/guide-dell-inspiron-15-7548-uhd-macos-11-1-opencore-ful-hotpatch.308697/

Post Post Install 1. Optimizing Power Management For better performance on CPU's power management. Mostly for Find the Inte's ARK site for the processor and get its TDP-down Frequency, 600MH Download CPUFriendFriend and run it LFM (Low Frequency Mode) on CPUFriendFriend, set to 08 (800Mhz)...

Post Install Guide 1. Not Needed ACPI Fixes The next fixes are named to keep track of what was already checked that needs no modification/patch. Embedded Controller. Its ACPI Path is \_SB.PCI0.LPCB.EC . Remove SSDT-EC-LAPTOP from ACPI System Clock. DSDT contains a Device under the name of...

Install Guide 1. Gathering Data This is vital information for creating the installer and for post install, many DDST patches depend on it. The necessary data -the device's ACPI path- can be obtained through Device Manager on Windows, in a property called BIOS device name. Embedded...

Hardware Specifications General Vendor: Dell Model: Inspiron 15 7548 Processor: Intel Core i7-5500U (2 @ 2.4GHz) (15W) (Broadwell-U) Display: 15,6" 4K Truelife Touchscreen panel (3480x2160 @60/48Hz) Hard Drive: 256GB SSD Liteon (SATA AHCI) (LCH-256V2S-11 2.5 7mm) Memory: 16GB DDR3 (1600MHz)...

For those who want to know, this issue was solved in this post. The next new version of WhateverGreen solves the issue entirely. https://www.tonymacx86.com/threads/solved-guide-workaround-for-cdfon.306154/page-5#post-2210574

Hi! I have similar specs, and I highly recommend you to follow @Feartech guide using OpenCore: https://www.tonymacx86.com/threads/guide-booting-the-usb-installer-using-opencore.296375/ Read carefully and you should be able to boot to the installer without any problemas.

I have the same issue in a 3840x2160 internal screen whether I use the screen’s full resolution or 1920x1080 HiDPI. Any lower resolution or HiDPI scaling works fine (but the icons and folders are too big or too small...) If you happen to find a solution please do tell, I will do as well.

You have the VoodooInput twice, disable the one from VoodooPS2