<< Solved >> HP Compaq Elite 8100 CMT, High Sierra. No USB at all after install.

[Asural]

Does anyone know what is wrong?

In order for the HP8100 to work with USB, you need to delete "/System/Library/Extensions/AppleHPET.kext".
His EFI in your first post should recognize the USB (it worked on my HP8100CMT).

I haven't been able to resolve the phenomenon that USB stops working within a few minutes after booting with OpenCore 0.6.8 or later.
I'm currently using Clover r5142, but if you want to use his OpenCore, use OpenCore 0.6.7.

 

[Santi]

Now I got it!
Thank you very much, @Asural you have given me the key on how to get around the problem.
Thank you very much @trs96, @Edhawk, you gave me a correct EFI and clues to follow until I get it.


The key would be in AppleHPET.kext.
By blocking it, all USBs are working, from startup and after sleep.
I have not deleted "/System/Library/Extensions/AppleHPET.kext"
I have locked in config.plist:
/ Kernel / Block /

<? xml version = "1.0" encoding = "UTF-8"?>
<! DOCTYPE plist PUBLIC "- // Apple // DTD PLIST 1.0 // EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version = "1.0">
<array>
<dict>
<key> Arch </key>
<string> Any </string>
<key> Comment </key>
<string> Disable AppleHPET.kext </string>
<key> Enabled </key>
<true />
<key> Identifier </key>
<string> com.apple.driver.AppleHPET </string>
<key> MaxKernel </key>
<string> </string>
<key> MinKernel </key>
<string> </string>
</dict>
</array>
</plist>

And now the USBs work from the start, no freezes that I have noticed and also after resting.

I don't know if it will be a very orthodox option, but since it is not my main computer I will be able to continue experimenting.
I think that with SSDTTime-master, maybe we could look for a suitable HPET option for this problem, but I don't have much knowledge to know it.


Now I have to solve the problem of making the system reboot.
Currently it does not restart, it freezes when restarting, I will continue testing things because I have pending the security update that requires restart and it could crash the system if it does not restart.

I repeat:
Thank you very much, @Asural, @trs96, @Edhawk.

I put here my current EFI. It needs cleaning of some patches and adds my own, like the one on the graph, but it could help other users.

Grets.
Santiago.

 

[Asural]

The key would be in AppleHPET.kext.
By blocking it, all USBs are working, from startup and after sleep.
I have not deleted "/System/Library/Extensions/AppleHPET.kext"
I have locked in config.plist:

@Santi, thank you very much!
Your response indicates that "OpenCore is continuously available on the HP8000/8100/8200".
(Unfortunately, I haven't successfully booted with OpenCore forms HP8000.)

Rebooting is a future issue with OpenCore, but it works fine with Clover.
I encourage you to try and compare both OpenCore/Clover.
I will continue to experiment with how to deal with his OpenCore.

For sound, Alcid = 17 is the dedicated ID, so it is recommended to change it.

 

[Santi]

Thank you very much @Asural.
I had headaches from the confusion that had formed.
This is a good computer, not my main computer, but bought cheap second hand. That is how I like to be able to tinker with it when my free time allows it.
In another time I will try with Opencore the restart, I think there may be solution here if I guess the paths in DSDT.aml https://dortania.github.io/OpenCore-Post-Install/usb/misc/shutdown.html

I don't know if it would be:

Return (CRES) /* \_SB_.PCI0.LPC_.COM1.CRES */
Return (CRES) /* \_SB_.PCI0.LPC_.COM2.CRES */
Return (PUE1) /* \_SB_.PCI0.EUS1._PRW.PUE1 */
Return (PUE2) /* \_SB_.PCI0.EUS2._PRW.PUE2 */
...etc.

But the syntax I do not master.


On the sound device, I had problems with some version of AppleALC.kext, which lagged on startup until I found a different version of kext. Now I'll try the Alcid 17. Thanks.


And to block AppleHPET.kext otherwise withouth config.plist /Kernel/Block/... Alternatively maybe I could try the multiple options offered by SSDTTime-master:

#######################################################
# Select IRQs To Nullify #
#######################################################

Current Legacy IRQs:

- NCP: [13]
- PIC: [2]
- TIME: [0]
- RTC: [8]
- PS2M: [12]
- KBD: [1]
- ECP0: [7]
- LPT0: [7]
- COM1: [4]
- COM2: [3]
- APIC: [5, 7, 10, 11, 14, 15, 5, 7, 10, 11, 14, 15, 5, 7, 10, 11, 14, 15, 5, 7, 10, 11, 14, 15, 5, 7, 10, 11, 14, 15, 5, 7, 10, 11, 14, 15, 4, 3, 4, 3, 3, 5, 7, 10, 4, 5, 7, 10, 3, 5, 7, 10, 4, 5, 7, 10, 3, 4, 3, 4, 4, 7, 10, 3, 7, 10, 4, 7, 10, 3, 7, 10]

C. Only Conflicting IRQs from Legacy Devices (0,8,11 from IPIC/TMR/RTC)
O. Only Conflicting IRQs (0,8,11)
L. Legacy IRQs (from IPIC, TMR/TIMR, and RTC)

You can also type your own list of Devices and IRQs.
The format is DEV1:IRQ1,IRQ2 DEV2:IRQ3,IRQ4
You can omit the IRQ# to remove all from that device (DEV1: DEV2:1,2,3)
For example, to remove IRQ 0 from RTC, all from IPIC, and 8 and 11 from TMR:

RTC:0 IPIC: TMR:8,11

Please select an option (default is C):

Although I do not know if it would be correct or I am very wrong.
Greetings and thank you very much for everything.
Merry Christmas for all.
Santi.

 

[Asural]

Rebooting is a future issue with OpenCore, but it works fine with Clover.
I encourage you to try and compare both OpenCore/Clover.
I will continue to experiment with how to deal with his OpenCore.

@Santi
The HP8100CMT can now be rebooted and the installer started with the "config.plist Root-> ACPI-> Quirks-> FadtEnableReset = YES" setting.

Merry Christmas for you.
Asural

 

[Santi]

@Santi
The HP8100CMT can now be rebooted and the installer started with the "config.plist Root-> ACPI-> Quirks-> FadtEnableReset = YES" setting.

Wow! The restart works and updated the system.
When applying the updates I got a kernel panic starting after updating.
So I booted from USB using EFI Opencore which doesn't have AppleHPET.kext blocked.
Then it booted up to the boot screen without having kernel panic finishing update.
After that I rebooted from EFI with AppleHPET.kext blocked and started without kernel panic.

In the OpenCore guide I did not find definition for this Quirk you have given me.
This old computer works like an iMac from a few years ago.
Now I'm going to try if I get Dual Boot with Windows on another hard drive (BIOS Legacy). Maybe it's easy to apply Refind.
@Asural Thanks a lot.
Merry Christmas.

 

[Asural]

When applying the updates I got a kernel panic starting after updating.
So I booted from USB using EFI Opencore which doesn't have AppleHPET.kext blocked.
Then it booted up to the boot screen without having kernel panic finishing update.
After that I rebooted from EFI with AppleHPET.kext blocked and started without kernel panic.

I noticed when installing from USB, but it did not start unless I set "config.plist Root-> Kernel-> Emulate-> DummyPowerManagement = YES".
It's hard to decide what to do with the DummyPowerManagement settings after the update is complete, but he's currently testing with DummyPowerManagement = NO.

I will attach the EFI used for the USB installation test, so please modify prev-lang: kbd and Generic to your own and try it.

NOTE:
The keyboard and mouse become unresponsive on the restart request screen.
If you leave it quietly for about 4 seconds, it will restart automatically.