iMac Pro 2010 iMac Graphics Card K2000M flashing failed

[streak8047]

Graphics card upgrade K200M for iMac 2010 21 inch failed on flashing with USB Ubuntu live boot ,the error
getting was I/O ERROR: cannot open file.Saved rom for current vbios was 156KB,while the new vbios file was
(K2100.rom ) was 256KB, don,t know this issue was higher 256KB bios needed or permission issues on Linux
am not try on windows environment.

./nvflash_linux -6 Quadro_Beta1.2/k2000.rom

 

[Ausdauersportler]

I would say even Linux filesystems are case sensitive...

Ever thought posting this in the correct thread instead in the middle of nowhere?

 

[streak8047]

Finally fix the vbios flashing with ch431a USB bios programmer ,fresh installation of mojave using mojave patcher
after the first boot uncheck legacy video patcher on post installation .Opencore is still not used for native brightness. Thanks @Nick [D]vB for vbios & tsialex for the support of experiments on old Apple devices .

 

[Ausdauersportler]

./nvflash_linux -6 Quadro_Beta1.2/K2000.rom

You should have used this command - the filename of the BIOS begins with a capital K

Your K2000M card does not support native brightness and so there is no use for OpenCore - expect you will spoof the iMacPro1,1 ID to come around the recent "black screen" issues with Catalina and High Sierra.

 

[streak8047]

./nvflash_linux -6 Quadro_Beta1.2/K2000.rom

You should have used this command - the filename of the BIOS begins with a capital K

Your K2000M card does not support native brightness and so there is no use for OpenCore - expect you will spoof the iMacPro1,1 ID to come around the recent "black screen" issues with Catalina and High Sierra.

Thanks for point out the mistakes on Linux,not have black screen issues only 5 seconds delay,iMac boot normally with apple logo ,for opencore am try to figure out your advice with iMac1.1

 

[Ausdauersportler]

Hi!

Open remote access, screen sharing and file sharing or have an external display ready. If the latest Mojave Upgrade ends up with a black screen on boot you need a way to add the patched AppleGraphicsControl extension or change the SD card config.

Currently I got no feedback on this on the thread. But who knows...
Most users migrated already to Catalina, so the issues there are more apparent to us.

 

[streak8047]

Am installed mojave 10.14.6 with dosdude1 patcher mojave patcher tool ,which graphics card get native brightness control with opencore ( WX7100 ,GTX 860M)

 

[Ausdauersportler]

List of all current cards listed with native brightness you will find on this thread - first page, first post. This is the place to ask. The GTX860M has no support, the WX7100 has, but is difficult to find a working one.

 

[streak8047]

Patched catalina 10.15.5 has any issue with using & download apple store ,purchased apps .