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配置与学习树莓派config.txt配置文件

配置树莓派config.txt文件

windows pc下配置

  • 将SD卡通过读卡器连接到PC。
  • 打开config.txt文件，或新建这样一个文件。
  • 配置config.txt。
    • hdmi_force_hotplug=1 强制伪装成HDMI输出
    • hdmi_drive=2 当你选择通过HDMI显示输出时，需要选择2，如果是DVI输出，则该项为1
    • hdmi_group=2 设置HDMI类型，1为CEA，2为DMT
    • hdmi_mode=16 设置屏幕分辨率，见后文
    • config_hdmi_boost=4 设置HDMI接口信号强度，抗干扰
    • sdtv_mode=2 PAL制式
    • arm_freq=800 主频
  • 将SD卡重新插回树莓派并启动。

配置说明

概述

由于树莓派没有传统的BIOS，所以它的各种配置文件被存放在一个名为config.txt的文件中。
树莓派的config.txt会在内核初始化之前被GPU读取。

文件格式

默认的，该文件中任何配置都是通过#来注释的，如果需要配置对应项，则需要将行首的#删除。

配置项

内存

      disable_I2cache     : 禁止ARM访问GPU的二级缓存，相应的需要在内核中关闭二级缓存，默认为0
      gpu_mem     : GPU内存以M为单位，设置ARM和GPU之间的内存分配。ARM会获得剩余所有内存，最小设16，默认64
      gpu_mem_256     : 对于有256MB内存的树莓派的GPU设置，会覆盖gpu_mem，最大设192，默认不设置
      gpu_mem_512     : 对于有512MB内存的树莓派的GPU设置， 会覆盖gpu_mem，最大设448，默认不设置
      disable_pvt     : 禁止每500毫秒调整一次RAM的刷新率（RAM温度测量）

CAM - 动态内存分配

      cma_lwm     : 当GPU可用内存低于cma_lwm所设值，将向ARM请求一些内存
      cma_hwm     : 当GPU可用内存高于cma_hwm所设值，将向ARM释放一些内存
要启动CMA，下边的参数要添加到cmdline.txt文件中：
    

  1. coherent_pool=6M smsc95xx.turbo_mode=N
    2.

视频

sdtv_mode 为复合信号输出设置视频制式(默认为0)
sdtv_mode=0 NTSC，日本和美国主要用这个
sdtv_mode=1 日本版NTSC – 无基座
sdtv_mode=2 PAL,国内和欧洲主要用这个
sdtv_mode=3 巴西版PAL – 副载波为525/60而不是625/50
sdtv_aspect 为复合信号输出设置宽高比(默认为1)
sdtv_aspect=1 4:3
sdtv_aspect=2 14:9
sdtv_aspect=3 16:9
sdtv_disable_colourburst 禁止复合信号输出彩色副载波群. 图片会显示为单色, 但是可能会更清晰
sdtv_disable_colourburst=1 禁止输出彩色副载波群
hdmi_safe 使用"安全模式"的设置去尝试用HDMI最大兼容性启动. 这和下面的组合是一个意思: hdmi_force_hotplug=1, config_hdmi_boost=4, hdmi_group=2, hdmi_mode=4, disable_overscan=0
hdmi_safe=1
hdmi_ignore_edid 如果你的显示器是天朝产的垃圾货, 允许系统忽略EDID显示数据
hdmi_ignore_edid=0xa5000080
hdmi_edid_file 当设为1时, 将会从edid.dat文件中读取EDID数据，而不是从显示器.[1]
hdmi_edid_file=1
hdmi_force_edid_audio 伪装成支持所有音频格式播放, 即便报告不支持也允许通过DTS/AC3.
hdmi_force_edid_audio=1
hdmi_force_edid_3d 伪装成全部CEA模式都支持3D, 即便EDID并不支持.
hdmi_force_edid_3d=1
avoid_edid_fuzzy_match 禁止去模糊匹配EDID中描述的模式. 即便遮蔽错误, 也选用匹配分辨率和最接近帧率的标准模式.
avoid_edid_fuzzy_match=1
hdmi_ignore_cec_init 不发送初始化激活源消息. 避免在重启时使(启用CEC)TV结束待机并切换频道.
hdmi_ignore_cec_init=1
hdmi_ignore_cec 伪装成TV不支持CEC. 将不会支持任何CEC功能.
hdmi_ignore_cec=1
hdmi_force_hotplug 伪装成HDMI热插拔信号被检测到, 出现HDMI显示器被接入
hdmi_force_hotplug=1 即便没有检测到HDMI显示器也要使用HDMI模式
hdmi_ignore_hotplug 伪装成HDMI热插拔信号没有被检测到, 出现HDMI显示器未接入
hdmi_ignore_hotplug=1 即便检测到HDMI显示器也要使用混合模式
hdmi_pixel_encoding 强制像素编码模式. 默认情况下会使用EDID请求的模式, 所以不需要修改.
hdmi_pixel_encoding=0 default (limited for CEA, full for DMT)
hdmi_pixel_encoding=1 RGB limited (16-235)
hdmi_pixel_encoding=2 RGB full ( 0-255)
hdmi_pixel_encoding=3 YCbCr limited (16-235)
hdmi_pixel_encoding=4 YCbCr limited ( 0-255)
hdmi_drive 选择HDMI还是DVI模式
hdmi_drive=1 DVI模式 (没声音)
hdmi_drive=2 HDMI模式 (如果支持并已启用将有声音输出)
hdmi_group 设置HDMI类型
不指定组, 或者设为0, 将会使用EDID报告的首选组.
hdmi_group=1 CEA
hdmi_group=2 DMT
hdmi_mode 设置在CEA或DMT格式下的屏幕分辨率
当hdmi_group=1 (CEA)时,下列值有效
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表示16:9比例(正常是4:3).
2x表示双倍像素(即更高的像素时脉, 每个像素重复两次)
4x表示四倍像素(即更高的像素时脉, 每个像素重复四次)
当hdmi_group=2 (DMT)时,下列值有效
警告: 根据这篇帖子所述
像素时脉是有限制的, 最高支持的模式是1920x1200 @60Hz with reduced blanking.
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
overscan_left 左侧跳过像素数
overscan_right 右侧跳过像素数
overscan_top 顶部跳过像素数
overscan_bottom 底部跳过像素数
framebuffer_width 控制台framebuffer宽度, 以像素为单位. 默认是显示器宽度减去超出扫描.
framebuffer_height 控制台framebuffer高度, 以像素为单位. 默认是显示器高度减去超出扫描.
framebuffer_depth 控制台framebuffer深度, 以位为单位. 默认是16位. 8位也是有效的, 但是默认RGB调色板会导致屏幕不可读. 24位效果更好 ,但是2012年6月15号发现有显示混乱问题. 32位没有混乱问题, 但是需要设置framebuffer_ignore_alpha=1, 并在2012年6月15号发现颜色显示错误.
framebuffer_ignore_alpha 设为1将禁用alpha通道. 仅对32位有效.
test_mode 允许在启动时做声音与图像测试.
disable_overscan 设为1将禁用超出扫描.
config_hdmi_boost 设置HDMI接口的信号强度. 默认为0. 如果出现HDMI干扰问题可以试试设为4. 最大为7.
display_rotate 顺时针旋转屏幕显示 (默认为0) 或者翻转显示.
display_rotate=0 正常
display_rotate=1 90度
display_rotate=2 180度
display_rotate=3 270度
display_rotate=0x10000 水平翻转
display_rotate=0x20000 垂直翻转
注意: 旋转90度或者270度额外需要GPU内存, 所以在GPU只分配到16M的时候旋转会无效. 可能的原因:Crashes my RPI before Linux boots if set to "1" -- REW 20120913.

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SS机场常用服务器线路微普及

原文link：https://www.duyaoss.com/archives/57/   为何写这么个帖子？ 更新时间：2019-11-29 由于机场用户增多，很多新用户压根不懂节点上面的名字代表什么，也不知道什么服务器比较适合自己，不懂什么是原生，等等。 所以开一个小帖，稍微介绍一下比较常见的服务器， 专业知识有限，所以只是给小白们介绍一下，其实我也很白，各位大佬见笑了。 在这里尤其感谢 Sukka 苏卡卡大佬和喵酱指导，以及 Nexitally 佩奇提供的资料介绍，否则我真不知道从哪儿开始动笔。后面地区内容都是佩奇帮忙码出来的。时间有限，慢慢再继续填充和修整 本文仅仅是抛砖引玉写一些机场主们告知我的 ISP、IDC 的体验，仅供参考。网络环境每天都在变化，今天飞快的服务器明天有可能龟速，有写的不对或者过时的地方还望大家指正。所以本文也算是一些机场主们把曾经踩过的坑分享给大家吧。（本来是想给小白写服务器介绍的，佩奇大佬写着写着就专业惯性的转到了商家哈哈哈，这是一个悲伤的故事） 测速图 Telegram 频道： https://t.me/DuyaoSS 主用链接： DuyaoSS - 毒药机场简介博客 常见名词： IPLC: "International Private Leased Circuit"的缩写，即“国际专线”。不过大部分机场通常看到的iplc，都只是阿里的经典网络，跨数据中心内网互通，阿里内网，并不是严格意义的iplc专线；当然也有其他渠道的，或真iplc，不过比较少。阿里云的内网互通底层原理是通过采购多个点对点的iplc专线，来连接各个数据中心，从而把各个数据中心纳入到自己的一套内网里面来。这样做有两个好处，其一是iplc链路上的带宽独享，完全不受公网波动影响，其二是过境的时候不需要经过GFW，确保了数据安全且不受外界各种因素干扰。但是需要注意一下阿里云的iplc也是有带宽上限的，如果过多的人同时挤到同一条专线上，峰值带宽超过专线的上限的话也同样会造成网络不稳定。其他渠道购买到的iplc价格很高，阿里云内网这种性价比超高这种好东西且用且珍惜。 IEPL国际以太网专线（International Ethernet Private Line,简称IEPL)，构建于MSTP设备平台上...
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产品随想 | 周刊 第130期：集结信徒，而非官僚

On Dyson, techno-centric design and social consumption   https://2earth.github.io/website/20250707.html 如何創造偉大的事物   https://ryolu.notion.site/1610a94b9c108079a95be4362afd4a26 集結信徒，而非官僚 Reflections on OpenAI   https://calv.info/openai-reflections 创业架构 Shui   https://github.com/rock-zhang/Shui 好好喝水 https://www.ghibli.jp/works/ 吉卜力作品的高清图 From Skeuomorphic to Liquid Glass: Apple's Strategic Bet on the Post-Touch Future   https://omc345.substack.com/p/from-skeuomorphic-to-liquid-glass 迄今为止关于苹果Liquid Glass变革的解读，最好的一篇 The Nueva School   https://en.wikipedia.org/wiki/The_Nueva_School?useskin=vector 看起来是很酷的一个学校 The Barbican   https://arslan.io/2025/05/12/barbican-estate/ 史蒂夫·乔布斯希望你阅读的 9 本书   https://www.douban.com/doulist/147158849/ 《禅者的初心》里有句话：“做任何事，其实都是在展示内心的天性，这是我们存在的唯一理由。” Chuck Feeney was one of the greatest philanthropists ever   https://www.gatesnotes.com/Remembering-Chuck-Feeney 慈善家 My new deadline: 20 years to give away virtually all my wealt...
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Interview with Steve Jobs, WGBH, 1990

Interviewer: what is it about this machine? Why is this machine so interesting? Why has it been so influential? Jobs: Ah ahm, I'll give you my point of view on it. I remember reading a magazine article a long time ago ah when I was ah twelve years ago maybe, in I think it was Scientific American . I'm not sure. And the article ahm proposed to measure the efficiency of locomotion for ah lots of species on planet earth to see which species was the most efficient at getting from point A to point B. Ah and they measured the kilocalories that each one expended. So ah they ranked them all and I remember that ahm...ah the Condor, Condor was the most efficient at [CLEARS THROAT] getting from point A to point B. And humankind, the crown of creation came in with a rather unimpressive showing about a third of the way down...
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