After installation with Ventoy rdinit=/vtoy/vtoy

I had the same problem. I installed Proxmox 8.3 using Ventoy and "GRUB mode". On Proxmox I was/am on GRUB, not Systemd-boot. Somehow "rdinit=/vtoy/vtoy" was automatically inserted every time, even though it did not show in GRUB_CMDLINE_LINUX_DEFAULT at /etc/default/grub and even though I was doing "update-grub" before rebooting. I could only boot if, while at GRUB menu edit mode, I deleted "rdinit=/vtoy/vtoy" (select boot entry, press "e", use cursors and delete, then CTRL+X).

Then I checked:

Code:
/boot/grub/grub.cfg
/etc/default/grub.d/init-select.cfg
/etc/default/grub.d/installer.cfg
/etc/default/proxmox-ve.cfg
/etc/default/grub.ucf-dist

and there were some instances of "rdinit=/vtoy/vtoy" in some places. I manually removed them using nano, did update-grub and after reboot I could boot successfully.
 
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