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| Original file line number | Diff line number | Diff line change |
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| ### Mouse Hiding | ||
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| **Goals** | ||
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| * We don't want a mouse pointer floating around the screen at all times | ||
| * We can use `unclutter` command line tool to hide the mouse adter `0.5s` of | ||
| inactivity | ||
| * Again we can use `systemd` to define a service which only starts `unclutter` | ||
| when the GUI is ready | ||
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| **Installing** | ||
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| 2. Create a new systemd service at `/lib/systemd/system/hidemouse.service` | ||
| 3. Copy the file below | ||
| 4. Reload the `systemctl` daemon using `sudo systemctl daemon-reload` | ||
| 5. Enable our `hidemouse.service` to be run on boot using `sudo systemctl enable hidemouse.service` | ||
| 6. Reboot the Raspberry Pi using `sudo reboot` | ||
| 7. Testing Locally Without Rebooting | ||
| * `sudo systemctl start hidemouse.service` | ||
| * `sudo systemctl stop hidemouse.service` | ||
| * `sudo systemctl restart hidemouse.service` | ||
| * `journalctl -u hidemouse -b --no-pager` to show the `hidemouse.service` logs since the | ||
| last boot `-b` and now use a pager to view the output `--no-pager` | ||
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| ```systemd | ||
| # hidemouse.service | ||
| [Unit] | ||
| Description=RC TV Hide Mouse | ||
| Wants=graphical.target | ||
| After=graphical.target | ||
| [Service] | ||
| Type=simple | ||
| Environment=DISPLAY=:0.0 | ||
| Environment=XAUTHORITY=/home/rctv/.Xauthority | ||
| ExecStart=/usr/bin/bash -c "/usr/bin/unclutter -idle 0.5 -root > /home/rctv/rctv-kiosk/hidemouse.log 2>&1" | ||
| Restart=on-abort | ||
| User=rctv | ||
| Group=rctv | ||
| [Install] | ||
| WantedBy=graphical.target | ||
| ``` | ||
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| **Debugging** | ||
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| - see [systemd-service.md](./systemd-service.md) |
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| ### Custom RCTV Systemd Service | ||
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| **Goals** | ||
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| * On startup, launch `/usr/bin/chromium-browser` in `--kiosk` mode | ||
| * Ensure that the Raspberry Pi never puts the display to sleep | ||
| * Relaunch the service if it was aborted | ||
| * Only launch the service once the GUI is ready | ||
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| **Installing** | ||
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| 1. Ensure that `$DISPLAY` is set even when connecting over SSH `echo "export | ||
| DISPLAY=:0.0 >> ~/.bashrc` | ||
| 2. Create a new systemd service at `/lib/systemd/system/rctv.service` | ||
| 3. Copy the file below | ||
| 4. Reload the `systemctl` daemon using `sudo systemctl daemon-reload` | ||
| 5. Enable our `rctv.service` to be run on boot using `sudo systemctl enable rctv.service` | ||
| 6. Reboot the Raspberry Pi using `sudo reboot` | ||
| 7. Testing Locally Without Rebooting | ||
| * `sudo systemctl start rctv.service` | ||
| * `sudo systemctl stop rctv.service` | ||
| * `sudo systemctl restart rctv.service` | ||
| * `journalctl -u rctv -b --no-pager` to show the `rctv.service` logs since the | ||
| last boot `-b` and now use a pager to view the output `--no-pager` | ||
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| **Debugging** | ||
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| 1. Use `systemd-analyze verify rctv.service` to see any issues with the service | ||
| file | ||
| 2. To see logs from systemd immediately after boot, view the file `sudo tail -f | ||
| /var/log/boot.log` and search for `rctv.service` | ||
| 3. If `systemd-analyze` shows a cyclic dependency (e.g. `multi-user.target` | ||
| requires `graphical.target` which requires `multi-user.target`), this may be | ||
| solved by removing symlinks to `rctv.service` in | ||
| `/etc/systemd/system/multi-user.target.wants` or | ||
| `/etc/systemd/system/graphical.target.wants` | ||
| 4. Lots of googling | ||
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| ```systemd | ||
| # rctv.service | ||
| [Unit] | ||
| Description=RC TV Startup | ||
| Wants=graphical.target | ||
| After=graphical.target | ||
| [Service] | ||
| Type=simple | ||
| Environment=DISPLAY=:0.0 | ||
| Environment=XAUTHORITY=/home/rctv/.Xauthority | ||
| ExecStartPre=/home/rctv/rctv-kiosk/kiosk.sh | ||
| ExecStart=/usr/bin/chromium-browser --no-sandbox --noerrdialogs --disable-infobars --kiosk https://rctv.recurse.com | ||
| Restart=on-abort | ||
| User=rctv | ||
| Group=rctv | ||
| [Install] | ||
| WantedBy=graphical.target | ||
| ``` |