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，建议用Notepad++等代码编辑器打开后找到如下代码：

调节任何参数时，将#号去除即可生效(下面修改的值是默认带#的，请务必去除#）

# 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) modes
hdmi_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