so the update that broke it was this:
Start-Date: 2025-10-31 15:58:54
Commandline: apt upgrade -y
Requested-By: frederico (1000)
Upgrade: nvidia-l4t-weston:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), containerd.io:arm64 (1.7.28-0\~ubuntu.22.04\~jammy, 1.7.28-1\~ubuntu.22.04\~jammy), docker-compose-plugin:arm64 (2.39.4-0\~ubuntu.22.04\~jammy, 2.40.3-1\~ubuntu.22.04\~jammy), nvidia-l4t-vulkan-sc-samples:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), bind9-host:arm64 (1:9.18.39-0ubuntu0.22.04.1, 1:9.18.39-0ubuntu0.22.04.2), docker-ce-cli:arm64 (5:28.5.0-1\~ubuntu.22.04\~jammy, 5:28.5.1-1\~ubuntu.22.04\~jammy), nvidia-l4t-vulkan-sc-sdk:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libctf-nobfd0:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), libssh-4:arm64 (0.9.6-2ubuntu0.22.04.4, 0.9.6-2ubuntu0.22.04.5), nvidia-l4t-firmware:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), wpasupplicant:arm64 (2:2.10-6ubuntu2.2, 2:2.10-6ubuntu2.3), nvidia-l4t-kernel-oot-headers:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), libxml2-dev:arm64 (2.9.13+dfsg-1ubuntu0.9, 2.9.13+dfsg-1ubuntu0.10), nvidia-l4t-oem-config:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-jetson-multimedia-api:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), xserver-xorg-core:arm64 (2:21.1.4-2ubuntu1.7\~22.04.15, 2:21.1.4-2ubuntu1.7\~22.04.16), nvidia-l4t-libwayland-egl1:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-wayland:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libnvidia-container1:arm64 (1.17.8-1, 1.18.0-1), nvidia-l4t-kernel-oot-modules:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), nvidia-l4t-kernel:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), libbinutils:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), nvidia-l4t-graphics-demos:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), gir1.2-javascriptcoregtk-4.0:arm64 (2.48.5-0ubuntu0.22.04.1, 2.48.7-0ubuntu0.22.04.2), nvidia-l4t-3d-core:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-nvpmodel:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-cuda-utils:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), gir1.2-webkit2-4.0:arm64 (2.48.5-0ubuntu0.22.04.1, 2.48.7-0ubuntu0.22.04.2), libwbclient0:arm64 (2:4.15.13+dfsg-0ubuntu1.8, 2:4.15.13+dfsg-0ubuntu1.10), libssh-gcrypt-4:arm64 (0.9.6-2ubuntu0.22.04.4, 0.9.6-2ubuntu0.22.04.5), nvidia-l4t-tools:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libsmbclient:arm64 (2:4.15.13+dfsg-0ubuntu1.8, 2:4.15.13+dfsg-0ubuntu1.10), nvidia-l4t-core:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libxml2:arm64 (2.9.13+dfsg-1ubuntu0.9, 2.9.13+dfsg-1ubuntu0.10), libcudnn9-samples:arm64 (9.13.1.26-1, 9.14.0.64-1), nvidia-l4t-kernel-dtbs:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), nvidia-l4t-optee:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-cuda:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), poppler-utils:arm64 (22.02.0-2ubuntu0.10, 22.02.0-2ubuntu0.11), nvidia-l4t-dla-compiler:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-nvml:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), docker-ce:arm64 (5:28.5.0-1\~ubuntu.22.04\~jammy, 5:28.5.1-1\~ubuntu.22.04\~jammy), nvidia-l4t-openwfd:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-nvfancontrol:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), xserver-xorg-legacy:arm64 (2:21.1.4-2ubuntu1.7\~22.04.15, 2:21.1.4-2ubuntu1.7\~22.04.16), nvidia-l4t-libwayland-client0:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-nvsci:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-init:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-gbm:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-jetsonpower-gui-tools:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-vulkan-sc:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-display-kernel:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), libpoppler-glib8:arm64 (22.02.0-2ubuntu0.10, 22.02.0-2ubuntu0.11), nvidia-l4t-configs:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-pva:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-multimedia:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), xserver-common:arm64 (2:21.1.4-2ubuntu1.7\~22.04.15, 2:21.1.4-2ubuntu1.7\~22.04.16), xwayland:arm64 (2:22.1.1-1ubuntu0.19, 2:22.1.1-1ubuntu0.20), nvidia-l4t-multimedia-utils:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-x11:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), docker-ce-rootless-extras:arm64 (5:28.5.0-1\~ubuntu.22.04\~jammy, 5:28.5.1-1\~ubuntu.22.04\~jammy), nvidia-l4t-apt-source:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libctf0:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), libpoppler118:arm64 (22.02.0-2ubuntu0.10, 22.02.0-2ubuntu0.11), nvidia-l4t-kernel-headers:arm64 (5.15.148-tegra-36.4.4-20250616085344, 5.15.148-tegra-36.4.7-20250918154033), libcudnn9-cuda-12:arm64 (9.13.1.26-1, 9.14.0.64-1), nvidia-l4t-bootloader:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), snapd:arm64 (2.68.5+ubuntu22.04.1, 2.71+ubuntu22.04), nvidia-l4t-gstreamer:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), binutils-aarch64-linux-gnu:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), libjavascriptcoregtk-4.0-18:arm64 (2.48.5-0ubuntu0.22.04.1, 2.48.7-0ubuntu0.22.04.2), distro-info-data:arm64 (0.52ubuntu0.9, 0.52ubuntu0.11), linux-firmware:arm64 (20220329.git681281e4-0ubuntu3.39, 20220329.git681281e4-0ubuntu3.40), binutils-common:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), libnvidia-container-tools:arm64 (1.17.8-1, 1.18.0-1), nvidia-l4t-camera:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), xserver-xephyr:arm64 (2:21.1.4-2ubuntu1.7\~22.04.15, 2:21.1.4-2ubuntu1.7\~22.04.16), nvidia-l4t-libwayland-cursor0:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), bind9-libs:arm64 (1:9.18.39-0ubuntu0.22.04.1, 1:9.18.39-0ubuntu0.22.04.2), nvidia-l4t-nvpmodel-gui-tools:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), samba-libs:arm64 (2:4.15.13+dfsg-0ubuntu1.8, 2:4.15.13+dfsg-0ubuntu1.10), libcudnn9-dev-cuda-12:arm64 (9.13.1.26-1, 9.14.0.64-1), nvidia-l4t-initrd:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-container-toolkit:arm64 (1.17.8-1, 1.18.0-1), nvidia-container-toolkit-base:arm64 (1.17.8-1, 1.18.0-1), libwebkit2gtk-4.0-37:arm64 (2.48.5-0ubuntu0.22.04.1, 2.48.7-0ubuntu0.22.04.2), libcudnn9-static-cuda-12:arm64 (9.13.1.26-1, 9.14.0.64-1), nvidia-l4t-libwayland-server0:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-xusb-firmware:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), nvidia-l4t-jetson-io:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), libcudnn9-headers-cuda-12:arm64 (9.13.1.26-1, 9.14.0.64-1), binutils:arm64 (2.38-4ubuntu2.8, 2.38-4ubuntu2.10), nvidia-l4t-vulkan-sc-dev:arm64 (36.4.4-20250616085344, 36.4.7-20250918154033), linux-libc-dev:arm64 (5.15.0-157.167, 5.15.0-161.171)
End-Date: 2025-10-31 16:03:41
$ uname -r
5.15.148-tegra
$ free
total used free shared buff/cache available
Mem: 7802808 374480 6835356 26864 592972 7191996
Swap: 3901392 0 3901392
Is it possible to boot the previous kernel, like grub allows you to on the jetson? that would be a simple way to check