chrome://device-log is a built-in log viewing tool in Chrome browser, used to troubleshoot hardware-related problems. 1. It records events and errors in the interaction between the browser and hardware such as camera, microphone, USB devices; 2. When using it, you can enter chrome://device-log/ in the address bar to enter the page; 3. Locate problems by refreshing the page, filtering keywords, paying attention to error information and checking timestamps; 4. Common applications include troubleshooting problems such as USB devices not recognized, audio and video devices cannot be used, external monitors are not working; 5. Suitable for use in scenarios such as device insertion without response, web page function abnormal, system normal but browser recognition failed.

Chrome's chrome://device-log page is a practical tool for troubleshooting hardware-related problems, especially when encountering peripheral connections, driver exceptions, or device identification issues. It will display log information related to hardware devices (such as cameras, microphones, USB devices, etc.) to help you quickly locate the problem.

What is chrome://device-log?

Open the Chrome browser address bar and enter chrome://device-log/ to enter this page. It is a built-in log viewer for Chrome, which specializes in recording events and errors during browser interaction with hardware devices. For example, if you insert a USB flash drive but it is not recognized, or if the sound does not switch over after the headphones are plugged in, you can see the corresponding log prompt here.

If you encounter some hardware devices that cannot be used normally and are not sure whether it is a system or browser problem, you can first see if there is any error message reported.

How to troubleshoot problems using chrome://device-log?

When you open this page, only partial logs will be displayed by default. In order to check the problem more comprehensively, it is recommended that you do the following:

• Refresh the page : Refresh the hardware before and after each operation to facilitate comparison and changes.
• Filter keywords : Enter the device name in the search box, such as "camera", "microphone", "usb", etc., to quickly find relevant entries.
• Follow the error message : If a log shows "failed", "error", or "not found", it means there may be a problem.
• Check the timestamp : Based on the time points you operate, find records for the corresponding time period.

For example: If you fail to call the camera on a web page, you can search for "video" or "camera" in chrome://device-log/ to see if the permission is denied and the device is not available.

Frequently Asked Questions and Coping Methods

The USB device is not recognized

• A prompt like "device not enumerated" or "unsupported device class" may appear in the log.
• Try replacing the USB socket or cable.
• Check if the driver is required.
• Confirm whether USB debugging mode is enabled (for Android devices).

Audio/video devices are not available

• Check whether the prompt "Permission denied" is prompted - it may be that the browser permissions are closed.
• If the prompt "Device is in use", another application is consuming the device.
• Check the operating system audio settings to make sure the default device is correct.

External monitor or projector not working

• There may be no direct error in the log, but you can determine whether it is recognized by the log changes before and after the connection.
• Use shortcut keys such as Win P or Cmd Option F2 to try to switch the display mode.
• Make sure the graphics card driver is the latest version.

When should I use this tool?

• When you plug in the device, the browser does not respond;
• Some web page functions rely on hardware but cannot function normally (such as video conferencing, scanner upload, etc.);
• There is no problem at the system level, but the browser just can't recognize it;
• The developer wants to confirm the status of the underlying device when debugging a web application.

Basically these scenarios and usages. Although it is not a universal diagnostic tool, chrome://device-log is a very practical entry point when troubleshooting some basic hardware compatibility or access permissions. Next time you encounter similar situations, you might as well try it.

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