Displays Information module

Collects some relevant information from the output of system_profiler -xml SPDisplaysDataType

Configuration

Displays infomation module has two settings that can be managed by adding them to the server environment variables or the .env file.

keep_previous_displays=TRUE
show_virtual_displays=TRUE

Table Schema

This is the table of values for 'displays':

• type (bool) Wether the display is internal (built-in) or external
• display_serial (string) Serial number of the display
• serial_number (string) Serial number of the computer it's connected to
• vendor (string) Public name translated by the model from hex value
• model (string) Model reported
• manufactured (string) Approximate date when it was manufactured
• native (string) Native resolution
• timestamp (int) UNIX timestamp
• ui_resolution (string) Resolution of the user interface
• current_resolution (string) Current resolution
• color_depth (string) Color depth in use by the framebuffer
• display_type (string) Type of display; LCD/CRT/Projector
• main_display (boolean) Is main display
• mirror (boolean) Is Mirrored
• mirror_status (string) Mirroring status
• online (boolean) Display online
• interlaced (boolean) Interlacing in use
• rotation_supported (boolean) Supports rotation
• television (boolean) Is a television
• display_asleep (boolean) Is display asleep
• ambient_brightness (boolean) Ambient brightness set
• automatic_graphics_switching (boolean) Automatic graphics switching in use
• retina (boolean) Is Retina display
• edr_enabled (boolean) EDR enabled
• edr_limit (float) EDR limit
• edr_supported (boolean) Supports EDR
• connection_type (string) Type of display connection in use
• dp_dpcd_version (string) Version of DisplayPort
• dp_current_bandwidth (string) Current bandwidth of DisplayPort
• dp_current_lanes (int) Current number of lanes in use by DisplayPort
• dp_current_spread (string) Current DisplayPort spread
• dp_hdcp_capability (boolean) Supports HDCP
• dp_max_bandwidth (string) Maximum DisplayPort bandwidth
• dp_max_lanes (int) Maximum DisplayPort lanes
• dp_max_spread (string) Maximum DisplayPort spread
• virtual_device (boolean) Is virtual display device
• dynamic_range (string) Dynamic range currently in use
• dp_adapter_firmware_version (string) Firmware version of DisplayPort adapter

Remarks

The default configuration of the module is to delete any previous display information it had for the computer. Also be advised that system_profiler does not return any display information when the client is at the login window.

Nonetheless you can configure it to keep old data by adding this to your config.php $conf['keep_previous_displays'] = TRUE;. Some examples of what to expect in each case:

Example of default behaviour:

• Scenario 1:

  • Laptop1 reports in the morning about the built-in display and an external display --> mr-php stores and displays both

  • Laptop1 reports later in the day about only the built-in display --> mr-php deletes any info display info it had for the laptop and stores the new data

• Scenario 2:

  • Laptop1 reports in the morning about the built-in display and an external display --> mr-php stores and displays both

  • Laptop1 is turned off and stored in a shelve.

  • Computer2 reports it's built-in display and the same external display --> mr-php stores both. At this point mr-php displays four entries, including a duplicate one for the display.

Example of preserving historic data:

• Scenario 1:

  • Laptop1 reports in the morning about the built-in display and an external display --> mr-php stores and displays both.

  • Laptop1 reports later in the day about only the built-in display --> mr-php overwrites the info it had for the built-in display but keeps the external display info. Both are displayed with the date when they were last seen.

• Scenario 2:

  • Laptop1 reports in the morning about the built-in display and an external display --> mr-php stores and displays both.

  • Laptop1 is turned off and stored in a shelve.

  • Computer2 reports it's built-in display and the same external display --> mr-php both under computer2's s/n overwriting the external display info it had. Computer2 becomes the last-seen-in computer. Three entries are displayed, possibly matching the number of company assets.

• Scenario 3:

  • Laptop1 reports in the morning about the built-in display and an external display --> mr-php stores and displays both
  • The display is broken/stolen/etc.
  • The display remains associated with Laptop1 until you remove Laptop1 from MR