Pnp0ca0 Now

It manages power negotiation, allowing your device to charge at high speeds (up to 100W) or act as a power source for other gadgets.

Enabling protocols like DisplayPort or Thunderbolt over the USB-C connector. pnp0ca0

ls /sys/bus/acpi/devices/PNP0CA0:00/ </code></pre> <h3>Driver binding</h3> <p>Usually handled by <code>industrialio</code> or platform-specific drivers:</p> <pre><code class="language-bash">cat /sys/bus/acpi/devices/PNP0CA0:00/modalias </code></pre> <h3>Read lux value (if exposed)</h3> <pre><code class="language-bash">cat /sys/bus/iio/devices/iio:device0/in_illuminance_input </code></pre> <h3>Debugging missing ALS</h3> <ul> <li>Update BIOS</li> <li>Check kernel config: <code>CONFIG_ACPI_ALS</code></li> <li>Force reload: <code>modprobe industrialio</code> and <code>modprobe acpi-als</code></li> </ul> <h3>Common issue</h3> <p>If <code>pnp0ca0</code> appears in <code>lspnp</code> but no ALS interface → ACPI firmware may not implement <code>_ALR</code> or <code>_ALI</code> methods.</p> <pre><code> --- It manages power negotiation, allowing your device to

Despite this, some users may still encounter issues with PNP0CA0, such as: It manages power negotiation