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## Environment Ubuntu 22.04 laptops running Firefox 116 and Chrome 117. System udev rules were recently modified centrally (config management) to change ownership/permissions for a set of HID devices. FIDO2 keys (YubiKey, Solo) present as /dev/hidra...
## Environment Ubuntu 22.04 LTS VM (cloud image) running systemd 249; custom service moved from /lib/systemd/system/myapp.service to /etc/systemd/system/myapp.service; ExecStart=/usr/local/bin/myapp-start.sh; script owned by root:root, mode 750; ser...
## Environment Ubuntu 22.04 desktop upgraded kernel recently; camera is a UVC webcam exposed as /dev/video0; application installed as a snap (example: snap 'cheese' or a snap-packaged videoconferencing client). ## Symptoms Snap application shows a...
## Environment Debian 12 server with mdadm RAID1 composed of two 2TB SATA disks: one internal (sda) and one in an external USB hot-swap enclosure (sdb). mdadm 4.2, kernel 6.1. After accidental power loss to the enclosure while OS running, the extern...
## Environment Ubuntu 22.04 LTS host running Docker Engine 24.0.2, containers running nginx:stable with a host bind mount /etc/nginx/conf.d/site.conf -> /etc/nginx/conf.d/site.conf inside container. Host edits done via VS Code's default save (atomic...
## Environment Debian 11 guest running on KVM/QEMU host (libvirt). Guest restored from a saved snapshot while host was migrated between physical nodes. Services include nginx, systemd-timedated, and several scheduled cron jobs for backups. ## Sympt...
## Environment Ubuntu 22.04 desktop with NetworkManager 1.40 (recently upgraded from 1.38), systemd-resolved acting as local stub resolver (127.0.0.53), multiple VPN and wired connections with per-connection 'search' and 'dns' settings intended to p...
## Environment Ubuntu 22.04 LTS host with LXD 5.12 running unprivileged LXC containers attached to an lxdbr0 bridge; host uses NetworkManager to manage physical NICs; host kernel 5.15.0-56; containers use bridged veth interfaces with predictable nam...
## Environment Ubuntu 22.04 LTS server, ZFS-on-Linux (zfsutils-linux from distro packages), pool created on another machine with ZFS 2.1.x, kernel upgraded from 5.15 to 5.19 via HWE kernel upgrade, system uses DKMS zfs module build, machine has 8 TB...
## Environment Ubuntu 22.04 server running systemd 249 with /var moved to a dedicated ext4 LVM logical volume (fstab updated). A critical internal service uses systemd socket activation (mydaemon.socket → mydaemon.service). ## Symptoms After reboo...