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Troubleshooting
14 articles tagged Troubleshooting, newest first.
NetBackup 11 Web UI Errors and RBAC Failures
How to tell a NetBackup 11 Web UI backend error from an RBAC authorization failure, with checks for roles, identity mapping, services and upgrades.
Windows Update Can Break a Proxmox VM on AMD EPYC
A Proxmox forum case reports a Windows Server 2019 VM on AMD EPYC with -cpu host,-hypervisor again failing to boot after the August 2026 update.
Veeam Jobs: Locked Files and Stuck Checkpoints
Locked backup files and failed Hyper-V checkpoint cleanup can turn one Veeam problem into several stuck jobs.
Veeam UI Bug: When an IP Field Blocks Migration
A Veeam migration where the static IPv4 field rejected input after a zero, why it matters for backup servers, and the supported V13 network workarounds.
We Blamed Veeam for Everything Until We Looked at Our Own Setup
Six months of Veeam S3 backup failures spark a debate: is the software broken, is the setup to blame, and are Cohesity, Nakivo, Druva or Rubrik better?
When an Upgrade Warning Says Something Is Broken
A vague unsupported OS agents warning sent an admin auditing everything, the upgrade then failed, and the warning turned out to be only advisory.
Clean Install, Still Broken: When Starting Over Fails
A full wipe-and-reinstall should have ended the problem, but a core Veeam service still refuses to stay up, turning a clean slate into another dead end.
It Shows Up But Won't Pass Through: The ESXi USB WiFi Trap
Why USB WiFi passthrough on ESXi often fails even when devices appear in lsusb and quirks are configured.
Fix VMware Fullscreen Corner Gaps Caused by Resolution Scaling
A quick troubleshooting sequence for VMware fullscreen corner gaps caused by display scaling mismatch.
How a Power Failure and a Broken initramfs Took Down My Proxmox
A power outage turned into a week-long debugging session when initramfs refused to mount the root filesystem. Here's what went wrong and how to fix it.
Zabbix Server Running but No Login? Common Mistakes to Check
Zabbix server running and the frontend loads, but login fails? Check credentials, MySQL port 3306, Docker localhost, SELinux, sockets and logs.
Proxmox 9.1 Upgrade Problems: Kernel, NIC and GPU Crashes
Proxmox 9.1 upgrade problems users reported: kernel panics, netdev crashes on Mellanox NICs, iGPU trouble with Frigate, and the rollbacks that helped.
Veeam Unable to Register Nutanix AHV Cluster: What to Check
Veeam deploys its proxy to a Nutanix AHV cluster, then says unable to register cluster. What I ruled out, what Reddit suggested and six checks worth doing.
Proxmox SSD Disappearing After Reboot: Troubleshooting Guide
Proxmox SSD disappearing after reboot? The community fixes that worked for a vanishing NVMe drive: ASPM, PCIe lanes, card seating, cooling and power.