Thank you for the report, and sorry for your angst.

Do we understand that the installation went to end, and the problem showed on first reboot?
From a Live ISO? ("does work when the use proprietary driver boot option is selected")
From the Classic ISO? ("the video configuration test feature seems to have been removed")
Are you able to get to a virtual console (Ctl/Alt/F2 or more)? Or boot to the command line? If so, post if you can the output of:
 $ inxi -G
to describe your system's graphics.

CC'ing Morgan, Frank & Martin who know more what to expect in this GeoForce area.

CC: (none) => fri, mageia, sturm-fr

Do we understand that the installation went to end, and the problem showed on first reboot? - This is correct. sort of.  see comments on live ISO
When booting, the screen blanks when the boot process starts.
I also noticed that the network also dies when the screen is blanked.  The network status/activity light turns off.  
Note on booting from the live ISO.  The screen does blank on the live ISO as well as the network activity light turning off.  The screen remains blanked for several minutes until the setup screens pop up, select language, etc.  After that, the graphics work normally.  Below is the output of inxi -G when booted from the live ISO.  I cannot get a result when booting from the hard drive as Ctl/Alt/F2 does not work (or at least nothing shows on screen. I cannot tell if the computer is actually responding to the keyboard.), and I cannot ssh into the machine due to the network failing during the screen blank.

Graphics:
  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics
    driver: i915 v: kernel
  Device-2: NVIDIA GP107 [GeForce GTX 1050 Ti] driver: nvidia v: 535.86.05
  Display: x11 server: X.org v: 1.21.1.8 with: Xwayland v: 22.1.9 driver: X:
    loaded: nvidia,v4l gpu: i915,nvidia resolution: 3840x2160~30Hz
  API: OpenGL v: 4.6.0 NVIDIA 535.86.05 renderer: NVIDIA GeForce GTX 1050
    Ti/PCIe/SSE2

PS: ("the video configuration test feature seems to have been removed") This may be incidental to the main issue?  It is an annoyance I noticed though.

Thank you for these clarifications.

Ping the CCs !

What is the boot command line on your installed system? (press 'e' in the GRUB menu to see it)

Here is the contents of the grub boot edit screen screen with line wrap exactly as shown:

setparams 'Mageia'

        savedefault
        set gfxpayload=text
        insmod gzio
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt2'
        if [x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=h\
d0,gpt2 --hint-baremetal=ahci0,gpt2 b536ae87-51d9-40f2-b690-65ac42a9c42c
        else
          search --no-floppy --fs-uuid --set=root b536ae87-51d9-40f2-b690-65ac42a9c\
42c
        fi
        echo       'Loading Linux 6.4.9-desktop-4.mga9 ...'
        linux      /boot/vmlinuz-6.4.9-desktop-4.mga9 root=UUID=b536ae87-51d9-40f\
2-b690-65ac42a9c42c ro  ro nokmsboot splash quiet noiswmd root=UUID=b536ae87-51d9-4\
0f2-b690-65ac42a9c42c audit=0 resume=UUID=157f6997-8c6d-4e49-85f5-3148bb68df7a vga=\
791
        echo      'Loading initial ramdisk ...'

(In reply to David Savolainen from comment #2)
 
> Note on booting from the live ISO.  The screen does blank on the live ISO as
> well as the network activity light turning off.  The screen remains blanked
> for several minutes until the setup screens pop up, select language, etc. 
> After that, the graphics work normally.

From the Live boot menu, did you select to use proprietary driver or not?

@David
Did you succeed in the end? Have you given up?

"Booting the live .iso does work when the use proprietary driver boot option is selected" answers the previous question.
"booting from the live ISO.  The screen does blank on the live ISO as well as the network activity light turning off.  The screen remains blanked for several minutes until the setup screens pop up, select language, etc.  After that, the graphics work normally"
This problem is just nothing visible until the Installer gets going, which is disconceting but harmless - and quite common.

The main problem of no graphics on the installed system - whether from a Live or Classic ISO -is of course serious. It may well be that the particular graphics card is not supported.
CC'd people might suggest things to try (different video modes, nouveau).

@Martin
Did comment 5 help?

CC: (none) => lewyssmith

From Comment 6:  Yes, I did select the use proprietary driver option

From Comment 7:  Yes, I gave up.  I attempted to use the live .iso without the proprietary driver, and it worked perfectly.  I did an install from the regular .iso without installing the proprietary driver, and it worked as well.  So currently, I am running Mageia 9 without the proprietary driver, and it is working sufficiently to meet my expectations.

Thank you for this feedback.

Assigning to Drivers maintainers, since it appears that nvidia v: 535.86.05 does not work with NVIDIA GP107 [GeForce GTX 1050 Ti]. I do not know whether it should, or whether a different nVidia driver would be more appropriate.

Assignee: bugsquad => kernel
CC: lewyssmith => (none)

Have you tried to boot the live ISO nonfree mode passing the option nouveau.modeset=0 to the boot (grub) cmdline?

What if you install the proprietary drivers after the installation or the live boot with the persistent partition, i.e. after having installed all the updates (kernel, etc.)?

Note that:

GeForce 1050Ti is one of the few cards supported by 5 series of drivers:

- nvidia-current (GeForce 735 and beyond in drakx11)
- nvidia470
- modesetting
- nouveau
- nvidia-newfeature

there is also actually a new series of drivers in nonfree/updates_testing.

nvidia-current: 535.129.03
nvidia470: 470.223.02
nvidia-newfeature: 545.29.02

CC: (none) => ghibomgx