这个配置提供了HDMI的所有故障排除用的保守设置。
请将SD卡插入电脑，将这些内容存为config.txt。（原来的config.txt可以备份一下。）
hdmi_force_hotplug=1 config_hdmi_boost=4 hdmi_group=2 hdmi_mode=9 hdmi_drive=2 hdmi_ignore_edid=0xa5000080 disable_overscan=1
解释：
hdmi_force_hotplug：强制使用HDMI输出（强行认为HDMI口已经插入了设备）
config_hdmi_boost：HDMI信号增强。
hdmi_group、hdmi_mode：决定分辨率。group=2, mode=9 代表800×600 @ 60Hz。
hdmi_drive：强制音频输出到HDMI口（注意，仅适用于带音频的HDMI-VGA转换器！！如果想让音频从模拟输出，则去掉此项！！）
hdmi_ignore_edid：强行按hdmi_group和hdmi_mode规定的分辨率输出。不检测显示器自身的分辨率。
disable_overscan：强行禁止保留黑边功能。
这个文件会命令树莓派：强制使用800×600分辨率，60Hz刷新率，并强制从HDMI输出。
请先尝试这样开机。如果开机能成功，就把hdmi_group和hdmi_mode，更改成自己显示器的分辨率即可。
所有可用的分辨率列表请见：自定义树莓派的显示分辨率。
如果不行，请更改hdmi_mode的值更换以下其他分辨率：
hdmi_mode=4 640×480 60Hz hdmi_mode=9 800×600 60Hz hdmi_mode=16 1024×768 60Hz hdmi_mode=17 1024×768 70Hz hdmi_mode=23 1280×768 60Hz
CEA分辨率
以下是CEA规定的电视规格分辨率。这些分辨率的hdmi_group=1
hdmi_mode=1 VGA hdmi_mode=2 480p 60Hz hdmi_mode=3 480p 60Hz H hdmi_mode=4 720p 60Hz hdmi_mode=5 1080i 60Hz hdmi_mode=6 480i 60Hz hdmi_mode=7 480i 60Hz H hdmi_mode=8 240p 60Hz hdmi_mode=9 240p 60Hz H hdmi_mode=10 480i 60Hz 4x hdmi_mode=11 480i 60Hz 4x H hdmi_mode=12 240p 60Hz 4x hdmi_mode=13 240p 60Hz 4x H hdmi_mode=14 480p 60Hz 2x hdmi_mode=15 480p 60Hz 2x H hdmi_mode=16 1080p 60Hz hdmi_mode=17 576p 50Hz hdmi_mode=18 576p 50Hz H hdmi_mode=19 720p 50Hz hdmi_mode=20 1080i 50Hz hdmi_mode=21 576i 50Hz hdmi_mode=22 576i 50Hz H hdmi_mode=23 288p 50Hz hdmi_mode=24 288p 50Hz H hdmi_mode=25 576i 50Hz 4x hdmi_mode=26 576i 50Hz 4x H hdmi_mode=27 288p 50Hz 4x hdmi_mode=28 288p 50Hz 4x H hdmi_mode=29 576p 50Hz 2x hdmi_mode=30 576p 50Hz 2x H hdmi_mode=31 1080p 50Hz hdmi_mode=32 1080p 24Hz hdmi_mode=33 1080p 25Hz hdmi_mode=34 1080p 30Hz hdmi_mode=35 480p 60Hz 4x hdmi_mode=36 480p 60Hz 4xH hdmi_mode=37 576p 50Hz 4x hdmi_mode=38 576p 50Hz 4x H hdmi_mode=39 1080i 50Hz reduced blanking hdmi_mode=40 1080i 100Hz hdmi_mode=41 720p 100Hz hdmi_mode=42 576p 100Hz hdmi_mode=43 576p 100Hz H hdmi_mode=44 576i 100Hz hdmi_mode=45 576i 100Hz H hdmi_mode=46 1080i 120Hz hdmi_mode=47 720p 120Hz hdmi_mode=48 480p 120Hz hdmi_mode=49 480p 120Hz H hdmi_mode=50 480i 120Hz hdmi_mode=51 480i 120Hz H hdmi_mode=52 576p 200Hz hdmi_mode=53 576p 200Hz H hdmi_mode=54 576i 200Hz hdmi_mode=55 576i 200Hz H hdmi_mode=56 480p 240Hz hdmi_mode=57 480p 240Hz H hdmi_mode=58 480i 240Hz hdmi_mode=59 480i 240Hz H H means 16:9 variant (of a normally 4:3 mode). 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分辨率
以下是计算机显示器使用的分辨率。这些分辨率的 hdmi_group=2
hdmi_mode=1 640×350 85Hz hdmi_mode=2 640×400 85Hz hdmi_mode=3 720×400 85Hz hdmi_mode=4 640×480 60Hz hdmi_mode=5 640×480 72Hz hdmi_mode=6 640×480 75Hz hdmi_mode=7 640×480 85Hz hdmi_mode=8 800×600 56Hz hdmi_mode=9 800×600 60Hz hdmi_mode=10 800×600 72Hz hdmi_mode=11 800×600 75Hz hdmi_mode=12 800×600 85Hz hdmi_mode=13 800×600 120Hz hdmi_mode=14 848×480 60Hz hdmi_mode=15 1024×768 43Hz DO NOT USE hdmi_mode=16 1024×768 60Hz hdmi_mode=17 1024×768 70Hz hdmi_mode=18 1024×768 75Hz hdmi_mode=19 1024×768 85Hz hdmi_mode=20 1024×768 120Hz hdmi_mode=21 1152×864 75Hz hdmi_mode=22 1280×768 reduced blanking hdmi_mode=23 1280×768 60Hz hdmi_mode=24 1280×768 75Hz hdmi_mode=25 1280×768 85Hz hdmi_mode=26 1280×768 120Hz reduced blanking hdmi_mode=27 1280×800 reduced blanking hdmi_mode=28 1280×800 60Hz hdmi_mode=29 1280×800 75Hz hdmi_mode=30 1280×800 85Hz hdmi_mode=31 1280×800 120Hz reduced blanking hdmi_mode=32 1280×960 60Hz hdmi_mode=33 1280×960 85Hz hdmi_mode=34 1280×960 120Hz reduced blanking hdmi_mode=35 1280×1024 60Hz hdmi_mode=36 1280×1024 75Hz hdmi_mode=37 1280×1024 85Hz hdmi_mode=38 1280×1024 120Hz reduced blanking hdmi_mode=39 1360×768 60Hz hdmi_mode=40 1360×768 120Hz reduced blanking hdmi_mode=41 1400×1050 reduced blanking hdmi_mode=42 1400×1050 60Hz hdmi_mode=43 1400×1050 75Hz hdmi_mode=44 1400×1050 85Hz hdmi_mode=45 1400×1050 120Hz reduced blanking hdmi_mode=46 1440×900 reduced blanking hdmi_mode=47 1440×900 60Hz hdmi_mode=48 1440×900 75Hz hdmi_mode=49 1440×900 85Hz hdmi_mode=50 1440×900 120Hz reduced blanking hdmi_mode=51 1600×1200 60Hz hdmi_mode=52 1600×1200 65Hz hdmi_mode=53 1600×1200 70Hz hdmi_mode=54 1600×1200 75Hz hdmi_mode=55 1600×1200 85Hz hdmi_mode=56 1600×1200 120Hz reduced blanking hdmi_mode=57 1680×1050 reduced blanking hdmi_mode=58 1680×1050 60Hz hdmi_mode=59 1680×1050 75Hz hdmi_mode=60 1680×1050 85Hz hdmi_mode=61 1680×1050 120Hz reduced blanking hdmi_mode=62 1792×1344 60Hz hdmi_mode=63 1792×1344 75Hz hdmi_mode=64 1792×1344 120Hz reduced blanking hdmi_mode=65 1856×1392 60Hz hdmi_mode=66 1856×1392 75Hz hdmi_mode=67 1856×1392 120Hz reduced blanking hdmi_mode=68 1920×1200 reduced blanking hdmi_mode=69 1920×1200 60Hz hdmi_mode=70 1920×1200 75Hz hdmi_mode=71 1920×1200 85Hz hdmi_mode=72 1920×1200 120Hz reduced blanking hdmi_mode=73 1920×1440 60Hz hdmi_mode=74 1920×1440 75Hz hdmi_mode=75 1920×1440 120Hz reduced blanking hdmi_mode=76 2560×1600 reduced blanking hdmi_mode=77 2560×1600 60Hz hdmi_mode=78 2560×1600 75Hz hdmi_mode=79 2560×1600 85Hz hdmi_mode=80 2560×1600 120Hz reduced blanking hdmi_mode=81 1366×768 60Hz hdmi_mode=82 1080p 60Hz hdmi_mode=83 1600×900 reduced blanking hdmi_mode=84 2048×1152 reduced blanking hdmi_mode=85 720p 60Hz hdmi_mode=86 1366×768 reduced blanking