iM 4,1-14,4 2011 iMac Graphics Card Upgrade

[an1979]

Hello, I have 21'5" 2011 Mac. Original card died after artefacting for some time.
I bought K2100M.
HP.

Black screen, USB with Linux (from xanderon https://forums.macrumors.com/thread....1596614/page-175?post=28184981#post-28184981 ) and USB with Win 10 PE starts load, I can execute commands, SSH, download/navigate with Putty and WinSCP etc.
RTFM on linux usb, reseted nvrom by holding alt+win+p+r to start clean.

However when I try to save original BIOS it's only 1536 bytes (the same image in Win and Linux).

I didn't try to write modded firmware yet ( ./nvflash_linux --protectoff ./nvflash_linux -6 k2100m.rom )
as I'm afraid the card won't live through it and I don't have a valid copy of original BIOS.
It is different from the only BIOS I found: https://www.techpowerup.com/vgabios/149851/hp-quadrok2100m-2048-130612

Subsystem id is different (Subsystem Id: 103C 197B --- versus mine: --- 103C-2256 ) , and comparing start of the file it's different from my card.


Here's what is outputted by nvflash_linux and nvflash64.exe

root@grml /lib/live/mount/medium/flash # ./nvflash_linux --save ~/original.rom

NVIDIA Firmware Update Utility (Version 5.414.0)
Simplified Version For OEM Only
Adapter: Quadro K2100M (10DE,11FC,103C,2256) H:--:NRM S:00,B:01,D:00,F:00

Identifying EEPROM...
EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page
Reading adapter firmware image...
IFR Data Size : 1208 bytes
IFR CRC32 : 3EF59662
IFR Image Size : 1536 bytes
IFR Image CRC32 : 0F617DA1
IFR Subsystem ID : 103C-2256
Image Size : 0 bytes
Version : Unavailable (Invalid) (IFR-only Image)
~CRC32 : 00000000
Image Hash : N/A
Subsystem ID : 103C-2256
Hierarchy ID : None
Chip SKU : N/A
Project : N/A
CDP : N/A
UEFI Support : No
UEFI Version : N/A
UEFI Variant Id : N/A ( Unknown )
UEFI Signer(s) : Unsigned
InfoROM Version : N/A
InfoROM Backup Exist : NO
License Placeholder : Absent
GPU Mode : N/A
Saving of image completed.

----

root@grml /lib/live/mount/medium/flash # ./nvflash_linux --listpp

NVIDIA Firmware Update Utility (Version 5.414.0)
Simplified Version For OEM Only
Reading VBIOS image for listing power policies....
Adapter: Quadro K2100M (10DE,11FC,103C,2256) H:--:NRM S:00,B:01,D:00,F:00

Identifying EEPROM...
EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page
InfoROM image is not present

-----

root@grml /lib/live/mount/medium/flash # ./nvflash_linux --save ~/test.ifr

NVIDIA Firmware Update Utility (Version 5.414.0)
Simplified Version For OEM Only
Reading VBIOS image for displaying OBD information....
Adapter: Quadro K2100M (10DE,11FC,103C,2256) H:--:NRM S:00,B:01,D:00,F:00

Identifying EEPROM...
EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page
InfoROM image is not present


====
nvflash64.exe --save testnv.rom

NVIDIA Firmware Update Utility (Version 5.567.0)
Copyright (C) 1993-2019, NVIDIA Corporation. All rights reserved.


Adapter: Quadro K2100M (10DE,11FC,103C,2256) H:--:NRM S:00,B:01,D:00,F:00


EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page

Build GUID : Blank
IFR Subsystem ID : 103C-2256
Subsystem Vendor ID : 0x103C
Subsystem ID : 0x2256
Version : Unavailable (Invalid) (IFR-only Image)
Image Hash : N/A
Hierarchy ID : N/A
Build Date : Blank
Modification Date : Blank
UEFI Version : N/A
UEFI Variant ID : N/A ( Unknown )
UEFI Signer(s) : Unsigned
XUSB-FW Version ID : N/A
XUSB-FW Build Time : N/A
InfoROM Version : N/A
InfoROM Backup : Not Present
License Placeholder : Not Present
GPU Mode : N/A

Saving of image completed.


----------

nvflash64.exe --check

NVIDIA Firmware Update Utility (Version 5.567.0)
Copyright (C) 1993-2019, NVIDIA Corporation. All rights reserved.


Adapter: Quadro K2100M (10DE,11FC,103C,2256) H:--:NRM S:00,B:01,D:00,F:00


EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page


Please make sure to connect external power for proper operation.

-------------

The last one is interesting.

Is it possible that previous card destroyed something with power? Is there some power line like is in desktop PC that supply extra power and if not connected card won't start? Or is it a red herring (I would've thought that BIOS should be readable all the time)?

 

[cirnolol]

you're right.

i use Imac 27 2011 + GTX 780m with the lastest vbios provided by Nick DVB.
i am familiar with the dismantling of my imac and i think i did it well.
i hope the card is still working...

PRAM reset (command-option-p-r) didnt resolved the case...

I had same situation. The reason was in bad GPU flash first time, and maybe one damaged connector. After one more flash and recompile everything was fine.

 

[Machist]

Why asking this question when you already found the answer?
Regarding the kernel panic I cannot help right now. But if you go back to the first page and first post you will find the "sleep issue" known to happen with 2011 models using Mojave or Catalina. This is the only situation where I can push my systems into a kernel panic. Apply these extensions, too - if not done before.

I install kexts and something goes wrong.
Now I get "No Entry sign" when try to boot.

Now I get kernel panics (reboot) when try to reinstall..
I think motherboard is faulty? this Machine randomly shutdown before I change GPU. I already change PSU.

 

[r6mile]

Have I killed part of the logic board? I get four LEDs but no backlight (haven't tried again), no hard drive, and fans spin up pretty quickly. I can boot the USB grml Linux image from the guide and see it on a second monitor. Anything I should check before I give up?

This is what I get on my 2010 27', and I'm pretty sure I've damaged something near the MXM slot, as well as the LCD sensor cable (hence the fans in my case). Try a few SMC and PRAM resets, but if that doesn't fix it then perhaps your logic board is damaged too...

 

[Ausdauersportler]

I install kexts and something goes wrong.
Now I get "No Entry sign" when try to boot.

Now I get kernel panics (reboot) when try to reinstall..
I think motherboard is faulty? this Machine randomly shutdown before I change GPU. I already change PSU.

Before I would give up a complete system board I would try to check the memory. Get a linux memtest boot stock image and check all the modules or put the in one by one and boot MacOS or try to find the ASD (no open source) or run the internal AHT with the old GPU. This has a memory test included, too. I would try the linux method.
[automerge]1594806639[/automerge]

Hello, I have 21'5" 2011 Mac. Original card died after artefacting for some time.
I bought K2100M.
HP.

Black screen, USB with Linux (from xanderon https://forums.macrumors.com/thread....1596614/page-175?post=28184981#post-28184981 ) and USB with Win 10 PE starts load, I can execute commands, SSH, download/navigate with Putty and WinSCP etc.
RTFM on linux usb, reseted nvrom by holding alt+win+p+r to start clean.

However when I try to save original BIOS it's only 1536 bytes (the same image in Win and Linux).

-------------

The last one is interesting.

Is it possible that previous card destroyed something with power? Is there some power line like is in desktop PC that supply extra power and if not connected card won't start? Or is it a red herring (I would've thought that BIOS should be readable all the time)?

HP notebooks run with a video card holding no VBIOS because the needed VBIOS is loaded on boot from the laptop BIOS (it is contained and managed by HP updates there). So it is really likely that you get a HP card having no valid VBIOS loaded. Just flash the version @Nick [D]vB published and go on.
If you cannot write to the BIOS chip on the card than you may have another (hardware related) problem with the card.
[automerge]1594806952[/automerge]

So I got 80% through with putting a K2100M into a 2011 21.5" iMac, and found that I have fried my SSD in the process. I did get a nasty shock at one point when I thought I had pulled the power cord but hadn't . I tried plugging in an old hard drive but it doesn't seem to be recognized by the Mac or when booted into Linux. Have I killed part of the logic board? I get four LEDs but no backlight (haven't tried again), no hard drive, and fans spin up pretty quickly. I can boot the USB grml Linux image from the guide and see it on a second monitor. Anything I should check before I give up?

If you have no hard drive installed the HDD fan will run at max RPM by default unless you install another original HDD, an SDD which will be recognised like the original HDD or you have a MacOS/Windows running with an app like Mac Fan Control (free).
Having no internal LCD may be related to the current non custom VBIOS loaded on the K2100M. Please flash the card, reinstall the SSD, boot from a @dosdude1 patcher stick or High Sierra USB boot stick and reinstall MacOS. Please check with HS first before moving on to Catalina. Most people struggle when trying four steps in one jump instead one by one...

 

[meggle]

Hi!

I just received a replacement WX7100 from my vendor. I had tried a 00D model a few weeks back with no success, the computer booted into OSX but did not detect the GPU at all. Nothing helped including OpenCore, VBIOS, Bootrom, etc.

This new GPU is a 00C variant and unfortunately it does not work also. I flashed it with WX7100_GOP.rom and this time the fan spins for a few seconds but the computer does not boot. I am attaching original VBIOS and pictures below.

I will receive my Desktop PC in a few weeks and might try using the card in there with a PCIe riser. If I do that I will report if it works. Apart from that I think I'll give up on the Mac or convert it into a Monitor. :~)

All the best to all of you!

P.S.: I had a close encounter with the PSU when the CPU cooler touched some of the contacts! It made a huge flash but nothing happened to me or the computer. Please always be careful and always unplug the computer when working on it!!

 

[Ausdauersportler]

Hi!

I just received a replacement WX7100 from my vendor. I had tried a 00D model a few weeks back with no success, the computer booted into OSX but did not detect the GPU at all. Nothing helped including OpenCore, VBIOS, Bootrom, etc.

This new GPU is a 00C variant and unfortunately it does not work also. I flashed it with WX7100_GOP.rom and this time the fan spins for a few seconds but the computer does not boot. I am attaching original VBIOS and pictures below.

I will receive my Desktop PC in a few weeks and might try using the card in there with a PCIe riser. If I do that I will report if it works. Apart from that I think I'll give up on the Mac or convert it into a Monitor. :~)

All the best to all of you!

P.S.: I had a close encounter with the PSU when the CPU cooler touched some of the contacts! It made a huge flash but nothing happened to me or the computer. Please always be careful and always unplug the computer when working on it!!

Thanks for reporting. Unfortunately we have the same success rate using some of the other AMD cards. Possibly we need to find a vendor doing a pre check on an iMac before sending cards out to customers, otherwise it will remain a gamble. Recently I found the first seller on Ali refusing to send our cards to Apple owners completely and another asking for the K2100M variant choosing from iMac and HP Unfortunately the K2100M will work in any case, as long as you flash the card before trying it.

 

[jovonov]

Hi @Nick [D]vB, not sure if I missed some information but does the newest update of post #1 mean that we can no longer expect to get a new vBios for 780m with e.g. Brightness Control?
Thanks for all your fantastic work!

 

[Ausdauersportler]

Hi @Nick [D]vB, not sure if I missed some information but does the newest update of post #1 mean that we can no longer expect to get a new vBios for 780m with e.g. Brightness Control?
Thanks for all your fantastic work!

This is a glass ball question. The announcement @Nick [D]vB made is still there on the thread, but we decided to reflect the current status of all the cards on post #1 - not what will be or may be in future. Sorry, nothing has changed, just the view through the first post on it.

 

[Ivan_B]

Hello everyone, with the little knowledge of English that I have, I have ventured to update the gpu of my imac mid 2011 21.5, using a k1100m, I have already changed the vbios using the ch314a mini programmer, but when I turn on my imac it only listens boot sound and no picture. I have doubts about what to do.

sorry for my English.

 

[Ausdauersportler]

Hello everyone, with the little knowledge of English that I have, I have ventured to update the gpu of my imac mid 2011 21.5, using a k1100m, I have already changed the vbios using the ch314a mini programmer, but when I turn on my imac it only listens boot sound and no picture. I have doubts about what to do.

sorry for my English.

Which OS you are booting right now?

There is a black screen issue with High Sierra, Mojave and Catalina 10.15.4 and later solved by using a patched extension linked on the first page.
Try to boot with alt/option pressed to see the apple boot picker - if this works the card is fine, just the OS needs to be patched.

 

[Machist]

Before I would give up a complete system board I would try to check the memory. Get a linux memtest boot stock image and check all the modules or put the in one by one and boot MacOS or try to find the ASD (no open source) or run the internal AHT with the old GPU. This has a memory test included, too. I would try the linux method.
[automerge]1594806639[/automerge]

I already run (several times) AHT with old GPU -> all passed.
Also I run memtest86 and remember -> all passed

With old GPU iMac randomly shutdown and I need to unplug power or it won't start again.
New GPU it reboots randomly.

Linux live usb -> no reboot/shutdown issues yet.

Also I format HDD+SSD and install Linux, after installation I only get black screen? Live USB work fine.

EDIT:

Ok, I installed Linux again and now screen is ok -> it was Nvidia driver problem.
Linux seems to work fine so this is only Mac OS issue?

 

[Ausdauersportler]

I already run (several times) AHT with old GPU -> all passed.
Also I run memtest86 and remember -> all passed

With old GPU iMac randomly shutdown and I need to unplug power or it won't start again.
New GPU it reboots randomly.

Linux live usb -> no reboot/shutdown issues yet.

Also I format HDD+SSD and install Linux, after installation I only get black screen? Live USB work fine.

EDIT:

Ok, I installed Linux again and now screen is ok -> it was Nvidia driver problem.
Linux seems to work fine so this is only Mac OS issue?

Random shutdowns are highly unlikely a MacOS problem. Because of the encapsulation of user land apps I cannot imagine in these days of an app causing a random shutdown. You may have bad installer fiies or an hardware issue. Reinstall MacOS on a separat partition using freshly installed USB installers (probably a new stick) and check this on your own.

 

[Murometc]

About the security content of macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra 15 July 2020

No test has been done yet, what are the implications of this regarding the issue under discussion?
If, of course, such consequences can occur.

 

[Pacific1972]

MXM Patch - Information

Video card VBIOS patch inside of a Laptop, Windows based PC with
MXM Port or an iMac with Windows or Linux partition is often the last
choice !

I've disassemble A1311 series iMacs for checking various MXM cards
estimated 50 times in the last three month...

Alternatively I have a HP 8300 USDT PC with large external power supply
(over 200W instead of 145W) - because I thought (stupid) that the power
consumption of the internal MXM slot is higher if putting NVIDIA cards in
than using HPs recommended ATI MXM Type B card with 35W. But the
internal MXM port have another power restriction which are limited by
mainboard hardware / PSU or BIOS - damned !!!

The overall method for patch MXM cards inside of a machine with Win or
Linux is often real stress ******** if trying out 3rd party Video cards with
BIOS chip.

I've printed out paper lists with NVFlash attributes for WINDOWS Terminal
and about the configuration of Linux, the Nvidia programs and the attributes
I don't want to think anymore to readout MXM cards...

1st flash with ROM file and perhaps 2nd flash for the right frequencies - or worst,
flashing over remote SSH with a second computer and black screen at the targeted
iMac Display - solving patch problems in hours long term ? NO THANKS !!!

Since a few weeks I've now using the USB BIOS programmer with cable clamp
and in comparation to the other methods this method is nearly perfect and
simple, if you know what to do and having the correct roadmap in your head...

CH341A Black series - how to use these hardware you can find on a few videos on youtube.

Search for the CH341A Serial to USB driver and CH341A Software. You only can install drivers
with yellow Bridge shortened PIN1 & PIN2. Install the cable Adapter (small green PCB) from
the USB stick how the software explain and connect the cable with the clamp on the
green PCB (cable-to-USB adapter in the picture at the right side in the middle) !

The red cable from cable clamp is No.1 and you must connect it to the pin1 of the small
green PCB). The clamp and the red cable you must connect at the dot point / Pin1 of the
SOP8 BIOS chip.

Then you can, if correctly installed drivers and fitting clamp, define and readout the BIOS chip
with the CH341A software. For correct clamp connection a red LED is glowing and on software
action you see the red LED and a yellow LED (read/write) like a HDD LED on the USB Stick.

If readout the BIOS correctly (from Laptop cards sometimes the SOP8 BIOS chip is blank !)
you can save the original BIOS. Please note that you have 128KB or 256KB SOP8 RAM and
compare this with the size of the ROM file. Than you can load the ROM file into CH341A
Software (Hex Editor) and go to the Button "WRITE". After compare ROM file with written
BIOS file ("ROM File is equal") the flashing process finished.

Sometimes you must open the clamp and connect it again for reinitialize, then compare
ROM File with BIOS file again (the red LED must glowing for correct connection) and after
readout the original BIOS you can erase the BIOS chip first before flashing new file...

THIS IS EASY with WINDOWS 10 !

...and the other methods ? You need hours to assemble and disassemble computers for the
video card flashing process inside of a machine (Laptop, MXM PC, iMac) and sometimes you
must handle various SSD / HDD to find correct OS to patch and this is chaotic...

Think about your patch method !

 

[herrdude]

...and the other methods ? You need hours to assemble and disassemble computers for the
video card flashing process inside of a machine (Laptop, MXM PC, iMac) and sometimes you
must handle various SSD / HDD to find correct OS to patch and this is chaotic...

Think about your patch method !

I am just curious. How do you intend to get the graphics card into the machine after you have flashed it?

 

[Ausdauersportler]

Just for the records:

Today I installed a K610M using @nikey22's BIOS in one 27" mid 2011, could install High Sierra to one APFS container (currently without the latest updates) and Catalina 10.15.6 to another container using the @dosdude1 patcher version 1.4.4. Doing this I first created the new APFS container using the disk utility, then starting up the patcher to download the latest Apple Catalina installer file and finally choose the install to disk method selecting the newly created container as a target. This works only for 2011 systems because you cannot opt out the automatic patch installation. On a 2009/2010 system this ends up having the highly unwanted legacy video patch installed.

Using the @highvoltage12v patch set gave the system the sleep back and QuickSync support, as well. Everything as usual...and I do not have the black screen issue, even without using a second display and without using the patched AppleGraphicsControl extension. Possibly the latest versions of Whatevergreen and Lilu are helping around this.

To be honest I did the complete installation having a second display connected. After getting the Catalina Loader and it's injection of Whatevergreen and Lilu I disconnected the external display. After months I do not know what triggers this black screen?

Screen shot attached...

Edit:
Installed the latest patches of High Sierra (as of July, 2020) and it worked. System is running without the patched AppleGraphicsControl.kext and without a black screen on boot.

 

[ZenSurfeur]

Can we upgrade catalina 10.15.5 to 10.15.6 using the catalina 10.15.6 combo updates or it's better to download the last version using dosdude1?
I suppose, I will need to patch again the ktext.
any feedbacks?

 

[Ausdauersportler]

Can we upgrade catalina 10.15.5 to 10.15.6 using the catalina 10.15.6 combo updates or it's better to download the last version using dosdude1?
I suppose, I will need to patch again the ktext.
any feedbacks?

Regardless which way you go you will have to reapply all the patches needed for your particular system. To make the update process working on Catalina you need other patches, right?

 

[herrdude]

Can we upgrade catalina 10.15.5 to 10.15.6 using the catalina 10.15.6 combo updates or it's better to download the last version using dosdude1?
I suppose, I will need to patch again the ktext.
any feedbacks?

In this thread : https://forums.macrumors.com/threads/macos-10-15-catalina-on-unsupported-macs.2183772/page-471

It seems that some have got it working using Dosdude1 installer. I am guessing you will have to install the Sandybridge kexts again.

 

[Pacific1972]

I am just curious. How do you intend to get the graphics card into the machine after you have flashed it?

Nerd , I flashed it now with CH341A USB Programmer

But originally I had more than one IMac and HP 8300 USDT PC for resolving my
patch problems. There was WIN10, WIN7, ubuntu Studio Linux 20.04 on various HDD
also for iMac available (MBR - no Bootcamp) - but often I don't know which OS was
on which HDD 😄 - sometimes I like Linux or WIN on IMac, random principle...

But here in my little "Home Office" room (perhaps 3m x 3m / 10feet x 10feet) I have
normally 2-3 iMacs (2010-2011), my HP PC with WIN10 and at minimum 5-10 HDDs
flying around im my workshop - and of course an external HDD copy station with
"click-on-demand" - here was all time "Spheres of Chaos"...

😄 😄 😄 😄 😄 😄

 

[Fernando Cardone]

Hi my friends,
I´m checking back. In resume i ordered k1100m. I flashed the card via ssh thanks to xanderon method.
The first boot showed artifacts in the screen that shows no system installed (imgs attached)
I went over to check if the board components were touching the heatsink metal, and assembled again.
The second and subsequent boots were black. Then i tried to flash again the board to see if it was still there, but showed "detecting gpu failed" so i guess its fried.

1st flash 3 root@grml /lib/live/mount/medium/flash # ./nvflash_linux -6 Quadro_Beta1.2/K1100.rom NVIDIA Firmware Update Utility (Version 5.414.0) Simplified Version For OEM Only Checking for matches between display adapter(s) and image(s)... Adapter: Quadro K1100M (10DE,0FF6,103C,2256) H:--:NRM S:00,B:01,D:00,F:00 WARNING: Firmware image PCI Subsystem ID (1028.15CC) does not match adapter PCI Subsystem ID (103C.2256). Please press 'y' to confirm override of PCI Subsystem ID's: y Overriding PCI subsystem ID mismatch Current - Version:80.07.EF.00.03 ID:FFFF:0FF6:103C:2256 GK107 Board - 20390502 (Normal Board) Replace with - VersionE.AD.00.BE.EF ID:10DE:0FF6:1028:15CC Quadro K1100M by Nick[D]vB (Normal Board) Update display adapter firmware? Press 'y' to confirm (any other key to abort): y Identifying EEPROM... EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page Storing updated firmware image... ................................................................ Verifying update... Update successful. Firmware image has been updated from version 80.07.EF.00.03 to DE.AD.00.BE.EF. A reboot is required for the update to take effect. ./nvflash_linux -6 Quadro_Beta1.2/K1100.rom 53.12s user 3.04s system 68% cpu 1:22.44 total root@grml /lib/live/mount/medium/flash # ./nvflash_linux --verify Quadro_Beta1.2/K1100.rom NVIDIA Firmware Update Utility (Version 5.414.0) Simplified Version For OEM Only Adapter: Quadro K1100M (10DE,0FF6,103C,2256) H:--:NRM S:00,B:01,D:00,F:00 Identifying EEPROM... EEPROM ID (EF,3012) : WBond W25X20A 2.7-3.6V 2048Kx1S, page Reading adapter firmware image... Current - VersionE.AD.00.BE.EF ID:10DE:0FF6:1028:15CC Quadro K1100M by Nick[D]vB (Normal Board) Compare with - VersionE.AD.00.BE.EF ID:10DE:0FF6:1028:15CC Quadro K1100M by Nick[D]vB (Normal Board) ERROR: Size difference between file(262144) and adapter firmware (101376)

2nd flash 2 root@grml /lib/live/mount/medium/flash # ./nvflash_linux -6 Quadro_Beta1.2/k1100.rom NVIDIA Firmware Update Utility (Version 5.414.0) Simplified Version For OEM Only Checking for matches between display adapter(s) and image(s)... Adapter: Quadro K1100M (10DE,0FF6,0000,0000) H:--:NRM S:00,B:01,D:00,F:00 Results: Index | Match | Flash | Name <00> Quadro K1100M (10DE,0FF6,0000,0000) S:00, B:01 Nothing changed! ERROR: Detecting GPU failed. 2 root@grml /lib/live/mount/medium/flash #

Dont´t want to derail your posts, but anyone here have a spare flashed board willing to sell?

 

[swm]

Bump. Thanks.

did you finally try it?

 

[Pacific1972]

Just for the records:

Today I installed a K610M using @nikey22's BIOS in one 27" mid 2011, could install High Sierra to one APFS container (currently without the latest updates) and Catalina 10.15.6 to another container using the @dosdude1 patcher version 1.4.4. Doing this I first created the new APFS container using the disk utility, then starting up the patcher to download the latest Apple Catalina installer file and finally choose the install to disk method selecting the newly created container as a target. This works only for 2011 systems because you cannot opt out the automatic patch installation. On a 2009/2010 system this ends up having the highly unwanted legacy video patch installed.

Using the @highvoltage12v patch set gave the system the sleep back and QuickSync support, as well. Everything as usual...and I do not have the black screen issue, even without using a second display and without using the patched AppleGraphicsControl extension. Possibly the latest versions of Whatevergreen and Lilu are helping around this.

To be honest I did the complete installation having a second display connected. After getting the Catalina Loader and it's injection of Whatevergreen and Lilu I disconnected the external display. After months I do not know what triggers this black screen?

Screen shot attached...

Oh, it's compareable with ATI HD4670M

 

[Ivan_B]

Which OS you are booting right now?

There is a black screen issue with High Sierra, Mojave and Catalina 10.15.4 and later solved by using a patched extension linked on the first page.
Try to boot with alt/option pressed to see the apple boot picker - if this works the card is fine, just the OS needs to be patched.

You were right, the problem was OS Catalina 15.4, I am already writing to you using my k1100m.
Thank you!