6 (6 A / 0 W)·All tags
Articles
2026
A China Telecom SIM could use LTE data on a Pixel 7 Pro but had no working voice service. This is the ADB and IMS evidence chain that traced the failure to a missing VoLTE CarrierConfig capability, plus the minimal fix and its reboot verification.
A single click on Stop Extending in the macOS 26 Screen Mirroring menu left a USB-C monitor black and invisible to System Settings and BetterDisplay. Tracing the WindowServer IndependentOutput flag through kernel, CoreGraphics, and persisted config, then clearing it with a SkyLight private API.
How I turned a KubeVirt Ubuntu VM into a four-day temporary egress with OpenSSH remote dynamic forwarding, systemd recovery, an absolute stop timer, observability, and complete key revocation.
Diagnose and fix Microsoft Store initialization failures caused by a missing AppContainer loopback exemption while Clash Verge uses a local system proxy.
2025
A Minisforum N100 used as a DNS server becomes unresponsive after ~1+ day uptime with system-wide stutter and suspected storage drop. This is a troubleshooting template with evidence-driven workflow.
A classic multi-VLAN connectivity incident: ICMP times out while the target clearly replies locally. The real causes are asymmetric routing from a wrong PVE default gateway and an OpenWrt misconfiguration that enables SNAT (masquerade) on the LAN zone. Fixed with hop-by-hop captures and minimal config changes.