#troubleshooting

8 posts.

Fixing Chromium virtual backgrounds on NVIDIA + Wayland - 4 May 2026
Meet's background blur turns your video into a solid white rectangle on NVIDIA + Wayland Chromium. The cause is a Chromium ↔ NVIDIA EGL interop bug in the canvas captureStream path. Two flags work around it; pick based on monitor setup.
Making CoolerControl's GUI start on login - 3 May 2026
CoolerControl ships a system daemon and a separate Qt GUI. The daemon controls fans at boot regardless of login, but the rpm doesn't install an autostart .desktop for the GUI, so the tray icon never appears. Drop one in `~/.config/autostart/` (or use Plasma's System Settings → Autostart) to fix it.
Making KopiaUI start on login when installed as a Flatpak - 28 April 2026
KopiaUI's built-in "Launch at startup" toggle silently fails under Flatpak. The sandbox can't write to host `~/.config/autostart/`. Fix is a hand-rolled autostart `.desktop` file with a minimal `flatpak run` Exec line.
Running rsync from a systemd timer on Bazzite (SELinux rsync_t domain) - 28 April 2026
You'll probably never need this exact setup. The reason it's written down is the SELinux mechanics underneath: domain transitions, audit2allow's blind spots, dontaudit, label inheritance, and how to actually figure out why SELinux is blocking you instead of just flipping a boolean.
Escaping the AWS SSM AppArmor profile with systemd-run - 25 April 2026
On Ubuntu, SSM Session Manager shells inherit the snap-amazon-ssm-agent AppArmor profile. Even root hits silent EACCES on writes. Escape via systemd-run.
Why your MCP server cannot see env vars from .bashrc - 25 April 2026
Claude Code spawns MCP servers as plain child processes. They never source .bashrc. Set MCP env vars in environment.d or the MCP env config, not your shell rc files.
Making 1Password browser extensions talk to the Flatpak desktop app - 25 April 2026
Browser extension can't see a Flatpak 1Password desktop app via native messaging. Sandbox isolation is the cause. Fix is the explicit cross-sandbox bridge 1Password ships.
Persistent CLI flags for Vivaldi on Linux - 25 April 2026
Vivaldi's launcher reads extra command-line flags from a config file in your home directory on every launch. That's where `--disable-gpu-compositing` and friends belong. Don't edit the .desktop file.