Dell 7548 (4K, Sleep, and Clover Resolution)

[mushang98]

Hey, I have successfully installed MacOS High SIerra (10.13.5), with some successes and some problem
What is working :

1. Power Management (Processor and battery)

2. Audio (Internal, Microphone, and HDMI Output)
3. Graphics (HD 5500)

4. Brightness (ACPI keys works)

5. Trackpad and Keyboard

6. Touchscreen

7. Webcam

8. SD Card Reader

9. USB

10. Bluetooth works but wifi doesn't (Intel 7265 unsupported)

 

What doesn't work :

1. 4K Resolution

• I can only turn the display to 4K when the background is solid color. and sometimes flickers.
• If the background is a picture, when 4K is set the screen turns on for some seconds and then goes blank

2. Sleep

• Stuck with blank screen and not sleeping

3. Clover Resolution

• If Legacy support = enable, clover and 1st stage boot logo is in a wrong resolution but 2nd stage is perfect.
• If Legacy support = disabled, clover and 1st stage boot logo is at 4K resolution (not scalled) and 2nd stage boot logo is garbled.
• ( So, I'm sticking with Legacy support enabled )

4. Radeon R7 M270

• Neither I can use it nor turn it off

 

 

 

Specs:

Dell Type    : 7548

Processor  : Core i7 5500U

Graphics    : HD5500 + R7 M270

Resolution : 3840x2160 (doesn't work)

Bios Ver     : A08

[Bronxteck]

have you tried using lilu and intelgraphicsfixup and CoreDisplayFixup plugin.

[Jake Lo]

You'll need to patch SSDT to disable the M270

Boot to Clover, press F4. Continue on to OSX

Compress and attach Clover here

For sleep, could be due to the M270 not disabled.

[mushang98]

Bronxteck, I already have those two kextes in my clover, because without the CoreDisplayFixup, the screen just doesn't work.

 

Jake Lo, OK, i'm attaching the file now.

 

Thanks for both of your replies, much appreciated.

EFI.zip

[Jake Lo]

See if this works, replace contents into /EFI/Clover

Make a backup first

 

7548_A08.zip

[mushang98]

Jack Lo, Awesome, That fixed the R7 M270, it's now disabled. But now every time I plugged a USB device, I got a message "USB Accessory Needs Power" and not mounting

 

Sleep and 4K still doesn't work

 

Oh and, using either my EFI and yours right after booting is done, The laptop randomly freezes for about 10 secs is this normal or symptom of a problem ?

Edited June 29, 2018 by mushang98
A bit more detail

[Jake Lo]

for sleep, run this command to determine issue

log show --style syslog | fgrep "Wake reason"

 

Try this Config. If still issue, post debug files

config.plist.zip

[mushang98]

Nice, USB is now fixed. 

 

log show --style syslog | fgrep "Wake reason"

Returned

2018-06-27 19:29:54.923982+0700  localhost kernel[0]: (AppleACPIPlatform) AppleACPIPlatformPower Wake reason: PWRB HDEF XHC (User)

2018-06-27 19:29:54.923985+0700  localhost kernel[0]: (AppleACPIPlatform) AppleACPIPlatformPower Wake reason: PWRB HDEF XHC (User)

 

It seems that wake reason is because I pressed power button ? I mean it is correct but it didn't go to sleep before I pressed it.

 

I don't know how, but sleep is now working. and wakes, only the screen flashes twice after wake. Thanks Mr. Jack. 

 

Leaving me with only

4K that only works with solid color background and no animation at the screen.

And I can't configure Clover resolution

 

Thanks for your help. So far so great.

[Jake Lo]

What Clover resolution?

[mushang98]

I can't change clover resolution to match my screen resolution. It stuck at 1280x1024 (It's not even in the right aspect ratio).

I've tried changing config.plist with no effect. Also some threads recommend to use CSMVideoDxe-64.efi which doesn't work on this laptop.

 

Any ideas regarding this ?