Boot stuck in emergency mode after fstab comment and network changes; LVM pve/vg_proxmox, Radeon GPU, cursor freezes

resuloztas

New Member
Oct 31, 2025
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Hi,


Proxmox VE 8.x boot stuck in emergency mode ("Failed to start" errors, garbled text, cursor freezes – see screenshots). No network, can't access web UI. Suspect Radeon GPU (512 MB VRAM) graphics issue. Help needed!


System Specs:


  • Hardware: [CPU e.g. Intel i5, RAM 16GB, Motherboard, GPU: Radeon RX 500 series (512 MB VRAM), Disks: /dev/sdb 118GB SSD (system LVM), /dev/sda 1TB HDD (data, commented in fstab)]
  • Version: 8.x (ISO USB Rufus DD, UEFI boot)
  • Kernel: 6.2 (from boot log)

What happened:


  1. Network broken (WiFi issue), chrooted via Ubuntu Live USB to edit /etc/network/interfaces for Ethernet (enp2s0 dhcp).
  2. Commented data disk (/dev/sda) in fstab (system /dev/sdb only visible).
  3. Rebooted without umount (cable plugged, gateway 192.168.2.1).
  4. Boot detects LVM VG "pve" and "vg_proxmox" active (/dev/mapper/pve-root clean), but services (networking, mounts) timeout.

Tried:


  • Rescue/debug: dmesg clean.
  • Ubuntu chroot: fsck root (clean), proxmox-boot-tool refresh, update-grub, added nomodeset.
  • BIOS: Secure Boot off, CSM on.
  • Ethernet cable plugged, LED on.

Current /etc/network/interfaces:


text

<span><span>auto lo</span></span><br><span><span>iface lo inet loopback</span></span><br><span><span></span></span><br><span><span>iface enp2s0 inet manual</span></span><br><span><span></span></span><br><span><span>auto vmbr0</span></span><br><span><span>iface vmbr0 inet dhcp</span></span><br><span><span> bridge-ports enp2s0</span></span><br><span><span> bridge-stp off</span></span><br><span><span> bridge-fd 0</span></span>



Current /etc/fstab (data disk commented):


text

<span><span>/dev/pve/root / ext4 errors=remount-ro 0 1</span></span><br><span><span> /dev/pve/swap none swap sw 0 0</span></span><br><span><span> /dev/sdb2 /boot/efi vfat defaults,nofail 0 1</span></span><br><span><span> /dev/sdb1 /boot ext4 defaults,nofail 0 2</span></span><br><span><span> # /dev/sda1 /mnt/data ext4 defaults 0 2</span></span><br><span><span> proc /proc proc defaults 0 0</span></span>



Logs:


  • Boot screen (LVM OK, services failed, cursor freeze – attached 1.png, 2.png, 3.png).
  • journalctl -xb: [Paste if accessible].

vg_proxmox conflict? Umount error? Fresh install last resort, data important. Thanks!