树莓派有黑边不能全屏解决方法

在使用树莓派连接HDMI电脑显示器的时候，可能会出现如下图所示的有黑边的情况。这时候需要调节分辨率以适应屏幕。

将树莓派的tf卡插入电脑，在卡的根目录下找到配置文件config.txt，打开后找到如下代码：
调节任何参数时，将#号去除即可生效

# uncomment to force a specific HDMI mode (this will force VGA)hdmi_group=2  //将显示模式切换成DMT（显示器模式）hdmi_mode=82  //1920x1080   60Hz    1080p 如果显示器不是1080P。则可以参考注1参数修改

这时候就将显示设置成1080P的分辨率，但是是不带声音的，如果你的显示器支持HDMI声音输出或者自带音响，则将如下代码参数去除#号解锁强制获取声音。

# uncomment to force a HDMI mode rather than DVI. This can make audio work in# DMT (computer monitor) modeshdmi_drive=2  //HDMI模式

更多设置参考官方配置文档：https://www.raspberrypi.org/documentation/configuration/config-txt.md

注1： DMT模式分辨率参数

hdmi_mode resolution frequency notes 1 640x350 85Hz 2 640x400 85Hz 3 720x400 85Hz 4 640x480 60Hz 5 640x480 72Hz 6 640x480 75Hz 7 640x480 85Hz 8 800x600 56Hz 9 800x600 60Hz 10 800x600 72Hz 11 800x600 75Hz 12 800x600 85Hz 13 800x600 120Hz 14 848x480 60Hz 15 1024x768 43Hz incompatible with the Raspberry Pi 16 1024x768 60Hz 17 1024x768 70Hz 18 1024x768 75Hz 19 1024x768 85Hz 20 1024x768 120Hz 21 1152x864 75Hz 22 1280x768 reduced blanking 23 1280x768 60Hz 24 1280x768 75Hz 25 1280x768 85Hz 26 1280x768 120Hz reduced blanking 27 1280x800 reduced blanking 28 1280x800 60Hz 29 1280x800 75Hz 30 1280x800 85Hz 31 1280x800 120Hz reduced blanking 32 1280x960 60Hz 33 1280x960 85Hz 34 1280x960 120Hz reduced blanking 35 1280x1024 60Hz 36 1280x1024 75Hz 37 1280x1024 85Hz 38 1280x1024 120Hz reduced blanking 39 1360x768 60Hz 40 1360x768 120Hz reduced blanking 41 1400x1050 reduced blanking 42 1400x1050 60Hz 43 1400x1050 75Hz 44 1400x1050 85Hz 45 1400x1050 120Hz reduced blanking 46 1440x900 reduced blanking 47 1440x900 60Hz 48 1440x900 75Hz 49 1440x900 85Hz 50 1440x900 120Hz reduced blanking 51 1600x1200 60Hz 52 1600x1200 65Hz 53 1600x1200 70Hz 54 1600x1200 75Hz 55 1600x1200 85Hz 56 1600x1200 120Hz reduced blanking 57 1680x1050 reduced blanking 58 1680x1050 60Hz 59 1680x1050 75Hz 60 1680x1050 85Hz 61 1680x1050 120Hz reduced blanking 62 1792x1344 60Hz 63 1792x1344 75Hz 64 1792x1344 120Hz reduced blanking 65 1856x1392 60Hz 66 1856x1392 75Hz 67 1856x1392 120Hz reduced blanking 68 1920x1200 reduced blanking 69 1920x1200 60Hz 70 1920x1200 75Hz 71 1920x1200 85Hz 72 1920x1200 120Hz reduced blanking 73 1920x1440 60Hz 74 1920x1440 75Hz 75 1920x1440 120Hz reduced blanking 76 2560x1600 reduced blanking 77 2560x1600 60Hz 78 2560x1600 75Hz 79 2560x1600 85Hz 80 2560x1600 120Hz reduced blanking 81 1366x768 60Hz 82 1920x1080 60Hz 1080p 83 1600x900 reduced blanking 84 2048x1152 reduced blanking 85 1280x720 60Hz 720p 86 1366x768 reduced blanking