In ubuntu, how does one forcibly set a 1920*1080 resolution for a computer connected to a TV through hdmi?

In ubuntu, how does one forcibly set a 1920*1080 resolution for a computer connected to a TV through hdmi xrandroid to only set some existing ones? What if the selected list does not exist? Xrandroid can view all the resolutions in the current system. if you do not need to create this new mode, and add how to set a 1920*1080 resolution for the computer connected to the TV through hdmi under ubuntu
Xrandroid can only set some existing ones. what if it does not exist in the selection list? Xrandroid can view all the resolutions in the current system. if you do not need to create the new mode, add it to the corresponding device, and then apply it. However, after the machine is restarted, the resolution will be restored. Therefore, you need to configure the three-step command in usr/bin/startFX. sh here. Then restart the machine. The details are as follows: (1) obtain the required resolution data: cvt 1920 1080 #1440x900 59.89Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHzModeline "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909-hsync + vsync (2) create this mode: xrandroid -- newmode "1920x1080" xxx Xxx uses the content after "1440x900_60.00". 60.00 indicates the resolution. if the resolution fails, you can also set it to 50.00 and try again $ xrandroid -- newmode "1920x1080_60.00" 106.50 1440 1528 1672 1904 900 903-hsync + vsync (3) add this mode to system resolution. Rate group xrandroid -- addmode plus the name displayed in the first step of the system resolution plus 1920*1080 if VGA, write VGA1, if yes, write DIV1 $ xrandroid -- addmode DVI1 "1920x1080_60.00" (4) reference this mode to take effect xrandroid -- output and display name 1920*1080 (with that resolution) change the current resolution. $ Xrandroid -- output DVI1 -- mode "1920x1080_60.00" (5) restart the machine. if the screen changes, the setting is successful. If there is no change, the setting fails. it may be because the input text is incorrect, or the TV itself does not support the resolution. At this time, you can change it to a slightly lower resolution and try again. for example, if "1600*900" is successful, it indicates it is a problem with the TV. if it is still unsuccessful, it indicates that there is an error in writing.