Customize the display resolution of the Raspberry Pi

The Raspberry Pi can typically automatically detect the target device's resolution.
However, for some devices, especially the HDMI-VGA converters, the resolution may be significantly incorrect (too large or too small).
At this point you need to specify a resolution for the Raspberry Pi.

Change the Config.txt in the FAT32 section in front of the Raspberry Pi, and modify or add the following items:

hdmi_group=****hdmi_mode=****hdmi_ignore_edid=0xa5000080

The values for Hdmi_group and Hdmi_mode correspond to the resolution you want to adjust. See the text later.

Another "Hdmi_ignore_edid" is that the command Raspberry Pi does not detect any information on the HDMI device, only the output at the resolution we specify.
If not, the Raspberry Pi may still be "smart" to detect the resolution of the HDMI device, resulting in our set resolution is invalid.
Note that if you use the HDMI-VGA converter, the following failure occurs:
Resolution is incorrect-please refer to below.
Black screen--please refer to: HDMI-VGA converter black screen of the barrier scheme.
Intermittent black screen, system instability-may be a passive converter power consumption is too large, causing the Raspberry Pi power failure. Please use a HDMI-VGA converter with separate power input.

CEA Resolution
The following is the TV spec resolution specified by CEA. The hdmi_group=1 of these resolutions.

Hdmi_mode=1Vgahdmi_mode=2480p 60hzhdmi_mode=3480p 60Hz Hhdmi_mode=4720p 60hzhdmi_mode=51080i 60hzhdmi_mode=6480i 60hzhdmi_mode=7480i 60Hz Hhdmi_mode=8240p 60hzhdmi_mode=9240p 60Hz Hhdmi_mode=10480i 60Hz 4xhdmi_mode=11480i 60Hz 4x Hhdmi_mode=12240p 60Hz 4xhdmi_mode=13240p 60Hz 4x Hhdmi_mode=14480p 60Hz 2xhdmi_mode=15480p 60Hz 2x Hhdmi_mode=161080p 60hzhdmi_mode=17576p 50hzhdmi_mode=18576p 50Hz Hhdmi_mode=19720p 50hzhdmi_mode=201080i 50hzhdmi_mode=21576i 50hzhdmi_mode=22576i 50Hz Hhdmi_mode=23288p 50hzhdmi_mode=24288p 50Hz Hhdmi_mode=25576i 50Hz 4xhdmi_mode=26576i 50Hz 4x Hhdmi_mode=27288p 50Hz 4xhdmi_mode=28288p 50Hz 4x Hhdmi_mode=29576p 50Hz 2xhdmi_mode=30576p 50Hz 2x Hhdmi_mode=311080p 50hzhdmi_mode=321080p 24hzhdmi_mode=331080p 25hzhdmi_mode=341080p 30hzhdmi_mode=35480p 60Hz 4xhdmi_mode=36480p 60Hz 4xhhdmi_mode=37576p 50Hz 4xhdmi_mode=38576p 50Hz 4x Hhdmi_mode=391080i 50Hz Reduced Blankinghdmi_mode=401080i 100hzhdmi_mode=41720p 100hzhdmi_mode=42576p 100hzhdmi_mode=43576p 100Hz Hhdmi_mode=44576i 100hzhdmi_mode=45576i 100Hz Hhdmi_mode=461080i 120hzhdmi_mode=47720p 120hzhdmi_mode=48480p 120hzhdmi_mode=49480p 120Hz Hhdmi_mode=50480i 120hzhdmi_mode=51480i 120Hz Hhdmi_mode=52576p 200hzhdmi_mode=53576p 200Hz Hhdmi_mode=54576i 200hzhdmi_mode=55576i 200Hz Hhdmi_mode=56480p 240hzhdmi_mode=57480p 240Hz Hhdmi_mode=58480i 240hzhdmi_mode=59480i 240Hz HH means16:9 Variant (of a normally 4:3mode). 2x means pixel doubled (i.e. higher clock rate, with each pixel repeated twice) 4x means pixel quadrupled (i.e. Higher clock rate, with each pixel repeated four times)

DMT Resolution
The following is the resolution used by the computer monitor. The hdmi_group=2 of these resolutions.

Hdmi_mode=1 640x35085hzhdmi_mode=2 640x40085hzhdmi_mode=3 720x40085hzhdmi_mode=4 640x48060hzhdmi_mode=5 640x48072hzhdmi_mode=6 640x48075hzhdmi_mode=7 640x48085hzhdmi_mode=8 800x60056hzhdmi_mode=9 800x60060hzhdmi_mode=10 800x60072hzhdmi_mode=11 800x60075hzhdmi_mode=12 800x60085hzhdmi_mode=13 800x600120hzhdmi_mode=14848x480 60hzhdmi_mode=151024x768 43Hz do not Usehdmi_mode=161024x768 60hzhdmi_mode=171024x768 70hzhdmi_mode=181024x768 75hzhdmi_mode=191024x768 85hzhdmi_mode=201024x768 120hzhdmi_mode=211152x864 75hzhdmi_mode=22 1280x768reduced Blankinghdmi_mode=23 1280x76860hzhdmi_mode=24 1280x76875hzhdmi_mode=25 1280x76885hzhdmi_mode=26 1280x768120Hz Reduced Blankinghdmi_mode=27 1280x800reduced Blankinghdmi_mode=28 1280x80060hzhdmi_mode=29 1280x80075hzhdmi_mode=30 1280x80085hzhdmi_mode=31 1280x800120Hz Reduced Blankinghdmi_mode=32 1280x96060hzhdmi_mode=33 1280x96085hzhdmi_mode=34 1280x960120Hz Reduced Blankinghdmi_mode=35 1280x102460hzhdmi_mode=36 1280x102475hzhdmi_mode=37 1280x102485hzhdmi_mode=38 1280x1024120Hz Reduced Blankinghdmi_mode=39 1360x76860hzhdmi_mode=40 1360x768120Hz Reduced Blankinghdmi_mode=41 1400x1050reduced Blankinghdmi_mode=42 1400x105060hzhdmi_mode=43 1400x105075hzhdmi_mode=44 1400x105085hzhdmi_mode=45 1400x1050120Hz Reduced Blankinghdmi_mode=46 1440x900reduced Blankinghdmi_mode=47 1440x90060hzhdmi_mode=48 1440x90075hzhdmi_mode=49 1440x90085hzhdmi_mode=50 1440x900120Hz Reduced Blankinghdmi_mode=51 1600x120060hzhdmi_mode=52 1600x120065hzhdmi_mode=53 1600x120070hzhdmi_mode=54 1600x120075hzhdmi_mode=55 1600x120085hzhdmi_mode=56 1600x1200120Hz Reduced Blankinghdmi_mode=57 1680x1050reduced Blankinghdmi_mode=58 1680x105060hzhdmi_mode=59 1680x105075hzhdmi_mode=60 1680x105085hzhdmi_mode=61 1680x1050120Hz Reduced Blankinghdmi_mode=621792x1344 60hzhdmi_mode=631792x1344 75hzhdmi_mode=641792x1344 120Hz Reduced Blankinghdmi_mode=651856x1392 60hzhdmi_mode=661856x1392 75hzhdmi_mode=671856x1392 120Hz Reduced Blankinghdmi_mode=68 1920x1200reduced Blankinghdmi_mode=69 1920x120060hzhdmi_mode=70 1920x120075hzhdmi_mode=71 1920x120085hzhdmi_mode=72 1920x1200120Hz Reduced Blankinghdmi_mode=73 1920x144060hzhdmi_mode=74 1920x144075hzhdmi_mode=75 1920x1440120Hz Reduced Blankinghdmi_mode=76 2560x1600reduced Blankinghdmi_mode=77 2560x160060hzhdmi_mode=78 2560x160075hzhdmi_mode=79 2560x160085hzhdmi_mode=80 2560x1600120Hz Reduced Blankinghdmi_mode=811366x768 60hzhdmi_mode=821080p 60hzhdmi_mode=83 1600x900reduced Blankinghdmi_mode=841920x1200 Reduced Blankinghdmi_mode=85720p 60hzhdmi_mode=86 1366x768 Reduced blanking

Link Address: http://shumeipai.nxez.com/2013/08/31/custom-display-resolution-raspberry-pie.html

Customize the display resolution of the Raspberry Pi