树莓派连接显示器不亮屏的解决方案
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树莓派连接显示器不亮屏的解决方案
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樹莓派一般可以自動(dòng)檢測目標(biāo)設(shè)備的分辨率。但對(duì)于部分設(shè)備，分辨率可能會(huì)明顯不對(duì)（過大或過?。?。這時(shí)就需要給樹莓派指定一個(gè)分辨率。請(qǐng)將SD卡插入電腦，需要修改樹莓派的config.txt文件。（原來的config.txt可以備份一下。備份是個(gè)好習(xí)慣，以便錯(cuò)誤以后及時(shí)還原）
hdmi_force_hotplug=1 config_hdmi_boost=4 hdmi_group=2 hdmi_mode=9 hdmi_drive=2 hdmi_ignore_edid=0xa5000080 disable_overscan=1
解釋：
hdmi_force_hotplug：強(qiáng)制使用HDMI輸出（強(qiáng)行認(rèn)為HDMI口已經(jīng)插入了設(shè)備）
config_hdmi_boost：HDMI信號(hào)增強(qiáng)。
hdmi_group、hdmi_mode：決定分辨率。group=2, mode=9 代表800×600 @ 60Hz。
（我是怎么知道我電視機(jī)的分辨率的呢，我插上HDMI線的時(shí)候，電視屏幕右上角顯示的000x000，我就根據(jù)官方的那個(gè)對(duì)應(yīng)表，設(shè)置了group和mode值）
hdmi_drive：強(qiáng)制音頻輸出到HDMI口（注意，僅適用于帶音頻的HDMI-VGA轉(zhuǎn)換器?。∪绻胱屢纛l從模擬輸出，則去掉此項(xiàng)?。。?br />hdmi_ignore_edid：強(qiáng)行按hdmi_group和hdmi_mode規(guī)定的分辨率輸出。不檢測顯示器自身的分辨率。
disable_overscan：強(qiáng)行禁止保留黑邊功能。
這個(gè)文件會(huì)命令樹莓派：強(qiáng)制使用800×600分辨率，60Hz刷新率，并強(qiáng)制從HDMI輸出。請(qǐng)先嘗試這樣開機(jī)。如果開機(jī)能成功，就把hdmi_group和hdmi_mode，更改成自己顯示器的分辨率即可。
如果不行，請(qǐng)更改hdmi_mode的值更換以下其他分辨率：
CEA分辨率
以下是CEA規(guī)定的電視規(guī)格分辨率。這些分辨率的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
以下是計(jì)算機(jī)顯示器使用的分辨率。這些分辨率的hdmi_group=2
hdmi_mode=1 640x350 85Hz hdmi_mode=2 640x400 85Hz hdmi_mode=3 720x400 85Hz hdmi_mode=4 640x480 60Hz hdmi_mode=5 640x480 72Hz hdmi_mode=6 640x480 75Hz hdmi_mode=7 640x480 85Hz hdmi_mode=8 800x600 56Hz hdmi_mode=9 800x600 60Hz hdmi_mode=10 800x600 72Hz hdmi_mode=11 800x600 75Hz hdmi_mode=12 800x600 85Hz hdmi_mode=13 800x600 120Hz hdmi_mode=14 848x480 60Hz hdmi_mode=15 1024x768 43Hz DO NOT USE hdmi_mode=16 1024x768 60Hz hdmi_mode=17 1024x768 70Hz hdmi_mode=18 1024x768 75Hz hdmi_mode=19 1024x768 85Hz hdmi_mode=20 1024x768 120Hz hdmi_mode=21 1152x864 75Hz hdmi_mode=22 1280x768 reduced blanking hdmi_mode=23 1280x768 60Hz hdmi_mode=24 1280x768 75Hz hdmi_mode=25 1280x768 85Hz hdmi_mode=26 1280x768 120Hz reduced blanking hdmi_mode=27 1280x800 reduced blanking hdmi_mode=28 1280x800 60Hz hdmi_mode=29 1280x800 75Hz hdmi_mode=30 1280x800 85Hz hdmi_mode=31 1280x800 120Hz reduced blanking hdmi_mode=32 1280x960 60Hz hdmi_mode=33 1280x960 85Hz hdmi_mode=34 1280x960 120Hz reduced blanking hdmi_mode=35 1280x1024 60Hz hdmi_mode=36 1280x1024 75Hz hdmi_mode=37 1280x1024 85Hz hdmi_mode=38 1280x1024 120Hz reduced blanking hdmi_mode=39 1360x768 60Hz hdmi_mode=40 1360x768 120Hz reduced blanking hdmi_mode=41 1400x1050 reduced blanking hdmi_mode=42 1400x1050 60Hz hdmi_mode=43 1400x1050 75Hz hdmi_mode=44 1400x1050 85Hz hdmi_mode=45 1400x1050 120Hz reduced blanking hdmi_mode=46 1440x900 reduced blanking hdmi_mode=47 1440x900 60Hz hdmi_mode=48 1440x900 75Hz hdmi_mode=49 1440x900 85Hz hdmi_mode=50 1440x900 120Hz reduced blanking hdmi_mode=51 1600x1200 60Hz hdmi_mode=52 1600x1200 65Hz hdmi_mode=53 1600x1200 70Hz hdmi_mode=54 1600x1200 75Hz hdmi_mode=55 1600x1200 85Hz hdmi_mode=56 1600x1200 120Hz reduced blanking hdmi_mode=57 1680x1050 reduced blanking hdmi_mode=58 1680x1050 60Hz hdmi_mode=59 1680x1050 75Hz hdmi_mode=60 1680x1050 85Hz hdmi_mode=61 1680x1050 120Hz reduced blanking hdmi_mode=62 1792x1344 60Hz hdmi_mode=63 1792x1344 75Hz hdmi_mode=64 1792x1344 120Hz reduced blanking hdmi_mode=65 1856x1392 60Hz hdmi_mode=66 1856x1392 75Hz hdmi_mode=67 1856x1392 120Hz reduced blanking hdmi_mode=68 1920x1200 reduced blanking hdmi_mode=69 1920x1200 60Hz hdmi_mode=70 1920x1200 75Hz hdmi_mode=71 1920x1200 85Hz hdmi_mode=72 1920x1200 120Hz reduced blanking hdmi_mode=73 1920x1440 60Hz hdmi_mode=74 1920x1440 75Hz hdmi_mode=75 1920x1440 120Hz reduced blanking hdmi_mode=76 2560x1600 reduced blanking hdmi_mode=77 2560x1600 60Hz hdmi_mode=78 2560x1600 75Hz hdmi_mode=79 2560x1600 85Hz hdmi_mode=80 2560x1600 120Hz reduced blanking hdmi_mode=81 1366x768 60Hz hdmi_mode=82 1080p 60Hz hdmi_mode=83 1600x900 reduced blanking hdmi_mode=84 2048x1152 reduced blanking hdmi_mode=85 720p 60Hz hdmi_mode=86 1366x768 reduced blanking
修改完以后保存config.txt文件，重啟樹莓派。
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