Hi,
After the step:
$ export INSTALL_MOD_PATH=<install-path>/Linux_for_Tegra/rootfs/
$ sudo -E make modules_install
The files are in wrong path:
rootfs/usr/lib/modules/5.15.148-tegra/updates/nvidia-drm.ko
rootfs/usr/lib/modules/5.15.148-tegra/updates/nvidia.ko
rootfs/usr/lib/modules/5.15.148-tegra/updates/nvidia-modeset.ko
Please manually copy to
rootfs/usr/lib/modules/5.15.148-tegra/updates/opensrc-disp/nvidia-drm.ko
rootfs/usr/lib/modules/5.15.148-tegra/updates/opensrc-disp/nvidia.ko
rootfs/usr/lib/modules/5.15.148-tegra/updates/opensrc-disp/nvidia-modeset.ko
And then continue the steps.
There may be potential issues if wrong ko files are loaded. Please manually copy the files and try again.