A40 / displaymodeselector --gpumode graphics / Specified GPU mode not supported on this device 0x2235?

Seeing this same issue still.

Display Mode Selector Tool Version: 1.67.0
Card: Nvidia RTX A5000
OS: Debian Linux, kernel 6.2

17:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA102GL [RTX A5000] [10de:2231] (rev a1)
        Subsystem: Lenovo GA102GL [RTX A5000] [17aa:147e]
        Kernel driver in use: vfio-pci
        Kernel modules: nvidiafb, nouveau
17:00.1 Audio device [0403]: NVIDIA Corporation GA102 High Definition Audio Controller [10de:1aef] (rev a1)
        Subsystem: Lenovo GA102 High Definition Audio Controller [17aa:147e]
        Kernel driver in use: vfio-pci
        Kernel modules: snd_hda_intel
NVIDIA Display Mode Selector Utility (Version 1.67.0)
Copyright (C) 2015-2021, NVIDIA Corporation. All Rights Reserved.


WARNING: This operation updates the firmware on the board and could make
         the device unusable if your host system lacks the necessary support.

Are you sure you want to continue?
Press 'y' to confirm (any other key to abort):
y
Specifed GPU Mode "physical_display_disabled"


Update GPU Mode of all adapters to "physical_display_disabled"?
Press 'y' to confirm or 'n' to choose adapters or any other key to abort:
y

Updating GPU Mode of all eligible adapters to "physical_display_disabled"

Graphics Device      (10DE,2231,17AA,147E) S:00,B:17,D:00,F:00

Specified GPU mode not supported on this device 0x2231.

Can only attmpt once before the tool stops working with message:

ERROR: A system restart might be required before running the utility.
 Nvflash CPU side error Code:2Error Message: Falcon In HALT or STOP state, abort uCode command issuing process.

after this system must be powered off and disconnected from mains to let capacitors drain.

Interactive mode shows all 3 options:

NVIDIA Display Mode Selector Utility (Version 1.67.0)
Copyright (C) 2015-2021, NVIDIA Corporation. All Rights Reserved.


WARNING: This operation updates the firmware on the board and could make
         the device unusable if your host system lacks the necessary support.

Are you sure you want to continue?
Press 'y' to confirm (any other key to abort):
y
Select a number:
<0> physical_display_enabled_256MB_bar1
<1> physical_display_disabled
<2> physical_display_enabled_8GB_bar1

Select a number (ESC to quit):
1

Specifed GPU Mode "physical_display_disabled"


Update GPU Mode of all adapters to "physical_display_disabled"?
Press 'y' to confirm or 'n' to choose adapters or any other key to abort:
y

Updating GPU Mode of all eligible adapters to "physical_display_disabled"

Apply GPU Mode <4> corresponds to "physical_display_disabled"


ERROR: A system restart might be required before running the utility.
 Nvflash CPU side error Code:2Error Message: Falcon In HALT or STOP state, abort uCode command issuing process.

Possible cause:

GPU and other devices in the same iommu group get bound to other drivers after nvidia, nvidiafb etc… have been blacklisted

17:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA102GL [RTX A5000] [10de:2231] (rev a1)
        Subsystem: Lenovo GA102GL [RTX A5000] [17aa:147e]
        Kernel driver in use: vfio-pci <---------------
        Kernel modules: nvidiafb, nouveau
17:00.1 Audio device [0403]: NVIDIA Corporation GA102 High Definition Audio Controller [10de:1aef] (rev a1)
        Subsystem: Lenovo GA102 High Definition Audio Controller [17aa:147e]
        Kernel driver in use: vfio-pci <------------
        Kernel modules: snd_hda_intel

I used driverctl to manually unbind those device by setting overrides to “none”

sudo driverctl set-override 0000:17:00.0 none
sudo driverctl set-override 0000:17:00.1 none
sudo driverctl list-overrides
0000:17:00.0 (none)
0000:17:00.1 (none)

output of lspci -nnk

17:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA102GL [RTX A5000] [10de:2231] (rev a1)
        Subsystem: Lenovo GA102GL [RTX A5000] [17aa:147e]
        Kernel modules: nvidiafb, nouveau
17:00.1 Audio device [0403]: NVIDIA Corporation GA102 High Definition Audio Controller [10de:1aef] (rev a1)
        Subsystem: Lenovo GA102 High Definition Audio Controller [17aa:147e]
        Kernel modules: snd_hda_intel

After these steps I was able to run the displaymode selector tool in interractive mode and update the bios

    sudo ./displaymodeselector --gpumode

NVIDIA Display Mode Selector Utility (Version 1.67.0)
Copyright (C) 2015-2021, NVIDIA Corporation. All Rights Reserved.


WARNING: This operation updates the firmware on the board and could make
         the device unusable if your host system lacks the necessary support.

Are you sure you want to continue?
Press 'y' to confirm (any other key to abort):
y
Select a number:
<0> physical_display_enabled_256MB_bar1
<1> physical_display_disabled
<2> physical_display_enabled_8GB_bar1

Select a number (ESC to quit):
1

Specifed GPU Mode "physical_display_disabled"


Update GPU Mode of all adapters to "physical_display_disabled"?
Press 'y' to confirm or 'n' to choose adapters or any other key to abort:
y

Updating GPU Mode of all eligible adapters to "physical_display_disabled"

Apply GPU Mode <4> corresponds to "physical_display_disabled"

Reading EEPROM (this operation may take up to 30 seconds)

Reading EEPROM (this operation may take up to 30 seconds)

[==================================================] 100 %
Reading EEPROM (this operation may take up to 30 seconds)

Reading EEPROM (this operation may take up to 30 seconds)

Successfully updated GPU mode to "physical_display_disabled" ( Mode 4 ).

A reboot is required for the update to take effect.