#troubleshooting
Every post tagged troubleshooting.
Blog posts
How to Fix 'No Valid Subscription' and Repository Errors in Proxmox VE
Seeing a 'No valid subscription' pop-up or a 401 Unauthorized error when you run apt update on a fresh Proxmox VE install? Here's why it happens and the five-minute fix to switch to the free repository.
How to Fix a Proxmox VE Installer That Won't Boot or Freezes (USB, Secure Boot, and 'No Disks Found' Explained)
The Proxmox VE installer stuck on a black screen, frozen mid-install, or showing no disks at all? Here's how to rebuild your install USB correctly and fix the BIOS, Secure Boot, and storage controller settings that usually cause it.
How to Fix 'Could Not Activate Storage' in Proxmox VE (NFS, CIFS, ZFS, and LVM Explained)
Proxmox throwing 'could not activate storage'? Here's how to diagnose and fix NFS, CIFS/SMB, ZFS pool, and LVM activation failures with the exact pvesm, zpool, and vgs commands, without guessing or rebooting blind.
How to Fix a Black Screen in a Proxmox VE VM (Display Types: std VGA, VirtIO-GPU, and SPICE Explained)
Console showing a black screen or a resolution stuck at 1024x768? Here's what Proxmox VE's display types actually do, how std VGA, VirtIO-GPU, and SPICE differ, and how to fix the console for good.
How to Boot an Older Kernel in Proxmox VE (And Pin It So It Sticks)
A new Proxmox VE kernel broke your GPU passthrough or NIC driver? Here's how to boot back into the kernel that worked, pin it with proxmox-boot-tool so updates stop switching you back, and safely remove the pin once the regression is fixed.
Why Does Proxmox VE Show a Certificate Warning? Fixing "Your Connection Is Not Private"
Opened your fresh Proxmox VE install and got a scary browser warning? Here's why the self-signed certificate triggers it, how to safely proceed, and how to import the CA so it never shows up again.
How to Replace a Failed Disk in a Proxmox VE ZFS Pool (Step-by-Step Guide)
Your ZFS pool just went DEGRADED. Here's exactly how to identify the failed disk, swap it safely, and resilver a mirror or RAIDZ pool back to healthy on Proxmox VE 9.x.
How to Monitor Disk Health With S.M.A.R.T. in Proxmox VE (Catch a Failing Drive Before It Dies)
Proxmox VE can warn you weeks before a drive fails. Here's how to read SMART health data from the GUI and CLI, and set up smartd email alerts for SATA, SAS, and NVMe drives.
How to Install Proxmox VE on a Laptop (Fix No Wi-Fi, Lid-Close Shutdowns, and Single-NIC Networking)
Turning an old laptop into a Proxmox VE host is nearly free, but Wi-Fi won't bridge and the lid switch will suspend your VMs. Here's how to fix both, plus a full beginner install walkthrough.
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