TVSERVICE - Online Linux Manual PageSection : 1
NAMEtvservice − get and set information from attached displays
SYNOPSIStvservice [ −a ] [ −c mode aspect p ] [ −d filename ] [ −e group mode drive ] [ −j ] [ −l ] [ −m group ] [ −M ] [ −n ] [ −o ] [ −p ] [ −s ] [ −t ] [ −v id ] tvservice−h
tvservice−−help
DESCRIPTIONtvservice is a command line application used to get and set information about the display, targeted mainly at HDMI video and audio. Typing tvservice by itself will display a list of available command line options.
OPTIONS −a, −−audio Shows the current settings for the audio mode, including channels, sample rate and sample size. −c, −−sdtvon "mode aspect [P]" Power on the SDTV (composite output) with the specified mode, PAL or NSTC, and the specified aspect, 4:3, 14:9, 16:9. The optional ‟P” parameter can be used to specify progressive mode. −d, −−dumpid filename Save the current EDID to the specified filename. You can then use edid-decode(1) to display the data in a human readable form. See [EDID] for more information on the EDID contents. −e, −−explicit "group mode drive" Power on the HDMI display with the specified settings. The group option can be one of CEA, DMT, CEA_3D_SBS, CEA_3D_TB, CEA_3D_FP, or CEA_3D_FS; mode is one of the modes returned from the −−modes option. Finally, drive can be HDMI or DVI. −j, −−json When used in combination with the −−modes option, displays the mode information in JSON format. −l, −−list Lists all attached displays and their display ID. −m, −−modes group Shows a list of display modes available in the specified group, which can be either CEA or DMT. −M, −−monitor Monitors for any HDMI events, for example unplugging or attaching. −n, −−name Extracts the display name from the EDID data and shows it. −o, −−off Powers off the display output. Important Note: Powering off the output using this command will also destroy any framebuffers/dispmanx layers associated with the display. These are NOT re-established with a subsequent power on, so will result in a blank screen. A better option is to use the vcgencmd(1) display_power option, as this will retain any framebuffers, so when the power is turned back on the display will be the returned to the previous power on state. −p, −−preferred Power on the HDMI output with preferred settings. −s, −−status Shows the current settings for the display mode, including mode, resolution, and frequency. −t, −−ntsc Use 59.94Hz (NTSC frequency) rather than 60Hz for HDMI mode. −v, −−device id Specifies the ID of the device to use; see the output of −−list for available IDs.
SEE ALSOvcgencmd(1), edid-decode(1) Full documentation at [SOURCE].
REFERENCES[EDID] https://en.wikipedia.org/wiki/Extended_Display_Identification_Data [SOURCE] https://www.raspberrypi.org/documentation/raspbian/applications/tvservice.md 0
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