wanpo@bazzite:~$ cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Tue Sep  2 22:22:23 2025
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
# Updated by bootc-fstab-edit.service
#UUID=5b009648-6163-494a-a3d4-d78cddc1eb65 / btrfs subvol=root,noatime,lazytime,commit=120,discard=async,compress-force=zstd:1,space_cache=v2,ro 0 0
UUID=9c500d5b-d9e7-4d1b-98f5-0040d68d092e /boot                   ext4    defaults        1 2
UUID=C099-4785          /boot/efi               vfat    umask=0077,shortname=winnt 0 2
UUID=5b009648-6163-494a-a3d4-d78cddc1eb65 /home                   btrfs   subvol=home,noatime,lazytime,commit=120,discard=async,compress-force=zstd:1,space_cache=v2 0 0
UUID=5b009648-6163-494a-a3d4-d78cddc1eb65 /var                    btrfs   subvol=var,noatime,lazytime,commit=120,discard=async,compress-force=zstd:1,space_cache=v2 0 0
wanpo@bazzite:~$ journalctl -b | grep -i 'remount\|overlay\|fstab'
Sep 02 19:45:14 bazzite systemd[1]: fips-crypto-policy-overlay.service - Bind-mount FIPS crypto-policy in FIPS mode was skipped because of an unmet condition check (ConditionKernelCommandLine=fips=1).
Sep 02 19:45:14 bazzite systemd[1]: Starting systemd-remount-fs.service - Remount Root and Kernel File Systems...
Sep 02 19:45:14 bazzite systemd[1]: Finished systemd-remount-fs.service - Remount Root and Kernel File Systems.
Sep 02 19:45:15 bazzite systemd[1]: fips-crypto-policy-overlay.service - Bind-mount FIPS crypto-policy in FIPS mode was skipped because of an unmet condition check (ConditionKernelCommandLine=fips=1).
Sep 02 19:45:15 bazzite systemd[1]: Starting ostree-remount.service - OSTree Remount OS/ Bind Mounts...
Sep 02 19:45:15 bazzite systemd[1]: Finished ostree-remount.service - OSTree Remount OS/ Bind Mounts.
Sep 02 19:45:15 bazzite audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=ostree-remount comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Sep 02 19:45:16 bazzite systemd[1]: fips-crypto-policy-overlay.service - Bind-mount FIPS crypto-policy in FIPS mode was skipped because of an unmet condition check (ConditionKernelCommandLine=fips=1).
Sep 02 19:45:16 bazzite ublue-os-media-automount.py[1302]: Skipping /dev/nvme0n1p2: already in fstab
Sep 02 19:45:16 bazzite ublue-os-media-automount.py[1302]: Skipping /dev/nvme0n1p3: already in fstab
Sep 02 19:45:30 bazzite kernel: evm: overlay not supported
wanpo@bazzite:~$ cat /proc/cmdline
BOOT_IMAGE=(hd0,gpt2)/ostree/default-ffc5319b4f2255300071441bf9ba56f2ee6470ed6b92ce651d77329ad3befa8c/vmlinuz-6.15.9-116.bazzite.fc42.x86_64 ostree=/ostree/boot.1/default/ffc5319b4f2255300071441bf9ba56f2ee6470ed6b92ce651d77329ad3befa8c/0 rhgb quiet root=UUID=5b009648-6163-494a-a3d4-d78cddc1eb65 vconsole.keymap=br rootflags=subvol=root rw bluetooth.disable_ertm=1