[BUG] Error EACCES(-13): Permission denied opening /dev/i2c-0

[Mshmaitelly]

Read the FAQ first

• I have checked the FAQ but the issue is not covered

Description

With the fastfetch 2.38.0 (x86_64)
I am getting the following errors:

Error(s) opening ddc devices
Error EACCES(-13): Permission denied opening /dev/i2c-0
Error EACCES(-13): Permission denied opening /dev/i2c-1
Error EACCES(-13): Permission denied opening /dev/i2c-2
Error EACCES(-13): Permission denied opening /dev/i2c-3
Error EACCES(-13): Permission denied opening /dev/i2c-4
Error EACCES(-13): Permission denied opening /dev/i2c-5
Error EACCES(-13): Permission denied opening /dev/i2c-6
Error EACCES(-13): Permission denied opening /dev/i2c-7

I added my user account to i2c group (which has su prereligious) but I am still having the same error messages

Version used

fastfetch 2.38.0 (x86_64)

Bug prevalence

Always

Regression

Not sure

Installation

Package manager

Package manager

yay

Screenshots

Configuration

{
    "$schema": "https://github.com/fastfetch-cli/fastfetch/raw/dev/doc/json_schema.json",
    "logo": {
    "type": "auto",
    "source": "/home/mshmaitelly/Pictures/EOS_Logo.png",
    "width": 56,
    "height": 24
    },
    "modules": [
        "title",
        "separator",
        "os",
        "host",
        "bios",
        "board",
        "kernel",
        "uptime",
        "processes",
        "packages",
        "shell",
        "display",
        "brightness",
        "monitor",
        "lm",
        "de",
        "wm",
        "wmtheme",
        "theme",
        "icons",
        "font",
        "cursor",
        "wallpaper",
        "terminal",
        "terminalfont",
        "terminalsize",
        "terminaltheme",
        "cpu",
        "gpu",
        "memory",
        "physicalmemory",
        "disk",
        "poweradapter",
        "player",
        "media",
        "localip",
        "vulkan",
        "opengl",
        "sound",
        "camera",
        "physicaldisk",
        "break",
        "datetime",
        "weather",
        "colors"
    ]
}

System information

[
  {
    "type": "Title",
    "result": {
    },
    "stat": 0.00279999990016222
  },
  {
    "type": "Separator",
    "error": "Unsupported for JSON format",
    "stat": 0.00021700002253055573
  },
  {
    "type": "OS",
    "result": {
      "buildID": "2023.05.28",
      "codename": "rolling",
      "id": "endeavouros",
      "idLike": "arch",
      "name": "EndeavourOS",
      "prettyName": "EndeavourOS",
      "variant": "",
      "variantID": "",
      "version": "rolling",
      "versionID": ""
    },
    "stat": 0.02740499936044216
  },
  {
    "type": "Host",
    "error": "neither product_family nor product_name is set by O.E.M.",
    "stat": 0.1013000002130866
  },
  {
    "type": "Bios",
    "result": {
      "date": "07/21/2014",
      "release": "4.6",
      "vendor": "American Megatrends Inc.",
      "version": "2501",
      "type": "UEFI"
    },
    "stat": 0.0568869998678565
  },
  {
    "type": "Bootmgr",
    "result": {
      "name": "Linux Boot Manager",
      "firmware": "\\EFI\\systemd\\systemd-bootx64.efi",
      "secureBoot": false
    },
    "stat": 0.7587999999523163
  },
  {
    "type": "Board",
    "result": {
      "name": "P8Z77-V LX",
      "vendor": "ASUSTeK COMPUTER INC.",
      "version": "Rev X.0x",
      "serial": ""
    },
    "stat": 0.07862199936062098
  },
  {
    "type": "Chassis",
    "result": {
      "type": "Desktop",
      "vendor": "Chassis Manufacture",
      "version": "",
      "serial": ""
    },
    "stat": 0.05713700037449598
  },
  {
    "type": "Kernel",
    "result": {
      "architecture": "x86_64",
      "name": "Linux",
      "release": "6.13.5-zen1-1-zen",
      "version": "#1 ZEN SMP PREEMPT_DYNAMIC Thu, 27 Feb 2025 18:09:27 +0000",
      "displayVersion": "",
      "pageSize": 4096
    },
    "stat": 0.006599999964237213
  },
  {
    "type": "InitSystem",
    "result": {
      "name": "systemd",
      "exe": "/usr/lib/systemd/systemd",
      "version": "257.3-1-arch",
      "pid": 1
    },
    "stat": 0.6441999999806285
  },
  {
    "type": "Uptime",
    "result": {
      "uptime": 5495790,
      "bootTime": "2025-03-06T08:35:22.160-0600"
    },
    "stat": 0.08848899975419044
  },
  {
    "type": "Loadavg",
    "result": [
      0.47,
      0.63,
      0.55
    ],
    "stat": 0.04086500033736229
  },
  {
    "type": "Processes",
    "result": 305,
    "stat": 0.6152330003678799
  },
  {
    "type": "Packages",
    "result": {
      "all": 2460,
      "amSystem": 0,
      "amUser": 0,
      "apk": 0,
      "brew": 0,
      "brewCask": 0,
      "choco": 0,
      "dpkg": 0,
      "emerge": 0,
      "eopkg": 0,
      "flatpakSystem": 0,
      "flatpakUser": 0,
      "guixSystem": 0,
      "guixUser": 0,
      "guixHome": 0,
      "hpkgSystem": 0,
      "hpkgUser": 0,
      "linglong": 0,
      "mport": 0,
      "nixDefault": 0,
      "nixSystem": 0,
      "nixUser": 0,
      "opkg": 0,
      "pacman": 2460,
      "pacstall": 0,
      "paludis": 0,
      "pisi": 0,
      "pkg": 0,
      "pkgtool": 0,
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      "qi": 0,
      "macports": 0,
      "rpm": 0,
      "scoop": 0,
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      "sorcery": 0,
      "winget": 0,
      "xbps": 0,
      "pacmanBranch": ""
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    "stat": 0.9276259997859597
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  {
    "type": "Shell",
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      "exeName": "zsh",
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      "pid": 15798,
      "ppid": 15775,
      "processName": "zsh",
      "prettyName": "zsh",
      "version": "5.9",
      "tty": 1
    },
    "stat": 0.14702400006353855
  },
  {
    "type": "Editor",
    "result": {
      "type": "Editor",
      "name": "kate",
      "path": "/usr/bin/kate",
      "exe": "kate",
      "version": ""
    },
    "stat": 0.013788999989628792
  },
  {
    "type": "Display",
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        "name": "DELL U2412M",
        "primary": false,
        "output": {
          "width": 1200,
          "height": 1920,
          "refreshRate": 59.95
        },
        "scaled": {
          "width": 1200,
          "height": 1920
        },
        "preferred": {
          "width": 1920,
          "height": 1200,
          "refreshRate": 59.95
        },
        "physical": {
          "width": 324,
          "height": 518
        },
        "rotation": 90,
        "bitDepth": 0,
        "hdrStatus": "Unsupported",
        "type": "External",
        "manufactureDate": {
          "year": 2011,
          "week": 23
        },
        "serial": 808792140,
        "platformApi": "wayland-kde"
      },
      {
        "id": 875384900,
        "name": "C34J79x",
        "primary": true,
        "output": {
          "width": 3440,
          "height": 1440,
          "refreshRate": 99.982
        },
        "scaled": {
          "width": 3440,
          "height": 1440
        },
        "preferred": {
          "width": 3440,
          "height": 1440,
          "refreshRate": 99.982
        },
        "physical": {
          "width": 797,
          "height": 333
        },
        "rotation": 0,
        "bitDepth": 0,
        "hdrStatus": "Unsupported",
        "type": "External",
        "manufactureDate": {
          "year": 2023,
          "week": 15
        },
        "serial": 809056048,
        "platformApi": "wayland-kde"
      }
    ],
    "stat": 6.698207999579608
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  {
    "type": "Brightness",
    "result": [
      {
        "name": "C34J79x",
        "max": 100.0,
        "min": 0.0,
        "current": 30.0,
        "builtin": true
      }
    ],
    "stat": 742.0821699993685
  },
  {
    "type": "Monitor",
    "error": "Monitor module is an alias of Display module",
    "stat": 0.00205099955201149
  },
  {
    "type": "LM",
    "result": {
      "service": "sddm",
      "type": "Wayland",
      "version": "0.21.0"
    },
    "stat": 0.11888299975544214
  },
  {
    "type": "DE",
    "result": {
      "processName": "plasmashell",
      "prettyName": "KDE Plasma",
      "version": "6.3.2"
    },
    "stat": 0.01279400009661913
  },
  {
    "type": "WM",
    "result": {
      "processName": "kwin_wayland_wrapper",
      "prettyName": "KWin",
      "protocolName": "Wayland",
      "pluginName": "",
      "version": ""
    },
    "stat": 0.0019519999623298645
  },
  {
    "type": "WMTheme",
    "result": "KDE-Story-Blur-Blue-Dark-Aurorae-6",
    "stat": 0.012633999809622765
  },
  {
    "type": "Theme",
    "result": {
      "theme1": "Breeze (KDEStoryBuccaneerBlueDarkColorScheme) [Qt]",
      "theme2": "Material-Black-Mango-LA [GTK2/3/4]"
    },
    "stat": 0.11268100049346685
  },
  {
    "type": "Icons",
    "result": {
      "icons1": "Gradient-KDE-Story-Blue-Dark-Icons [Qt]",
      "icons2": "Gradient-KDE-Story-Blue-Dark-Icons [GTK2/3/4]"
    },
    "stat": 0.0014049997553229332
  },
  {
    "type": "Font",
    "result": {
      "display": "Noto Sans (14pt) [Qt], Noto Sans (14pt) [GTK2/3/4]",
      "fonts": [
        "Noto Sans (14pt)",
        "Noto Sans (14pt)",
        "Noto Sans (14pt)",
        "Noto Sans (14pt)"
      ]
    },
    "stat": 0.009370999410748482
  },
  {
    "type": "Cursor",
    "result": {
      "theme": "Bibata-Rainbow-Modern",
      "size": "24"
    },
    "stat": 0.017202000133693218
  },
  {
    "type": "Wallpaper",
    "result": "/home/mshmaitelly/Pictures/wp4470587-1200x1920-wallpapers.jpg",
    "stat": 0.0006539998576045036
  },
  {
    "type": "Terminal",
    "result": {
      "processName": "konsole",
      "exe": "/usr/bin/konsole",
      "exeName": "konsole",
      "exePath": "/usr/bin/konsole",
      "pid": 15775,
      "ppid": 1981,
      "prettyName": "konsole",
      "version": "24.12.2",
      "tty": ""
    },
    "stat": 0.040156000293791294
  },
  {
    "type": "TerminalFont",
    "result": {
      "font": {
        "name": "MesloLGS Nerd Font Mono",
        "size": "14",
        "styles": [],
        "pretty": "MesloLGS Nerd Font Mono (14pt)"
      },
      "fallback": {
        "name": "",
        "size": "",
        "styles": [],
        "pretty": ""
      }
    },
    "stat": 0.017217999324202538
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  {
    "type": "TerminalSize",
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      "height": 1352
    },
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  {
    "type": "TerminalTheme",
    "result": {
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      "bg": {
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  {
    "type": "CPU",
    "result": {
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    "type": "CPUCache",
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        "memory": {
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        "driver": "amdgpu 3.61",
        "name": "AMD Radeon HD 7800 Series",
        "temperature": 40.0,
        "type": "Discrete",
        "vendor": "AMD",
        "platformApi": "DRM (card2)",
        "frequency": 1000,
        "deviceId": 1000
      },
      {
        "index": null,
        "coreCount": null,
        "coreUsage": null,
        "memory": {
          "dedicated": {
            "total": 0,
            "used": 0
          },
          "shared": {
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            "used": 0
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        },
        "driver": "i915",
        "name": "2nd Generation Core Processor Family Integrated Graphics Controller",
        "temperature": null,
        "type": "Integrated",
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        "deviceId": 20
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  {
    "type": "Memory",
    "result": {
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      "used": 8646238208
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  {
    "type": "PhysicalMemory",
    "error": "Failed to get SMBIOS data",
    "stat": 0.0076500000432133675
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  {
    "type": "Swap",
    "result": {
      "total": 0,
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  {
    "type": "Disk",
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        "filesystem": "ext4",
        "mountpoint": "/mnt/eos_spare",
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    "type": "Btrfs",
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  {
    "type": "Zpool",
    "error": "dlopen libzfs.so failed",
    "stat": 0.17347500007599592
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  {
    "type": "Battery",
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    "stat": 0.008816000074148178
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  {
    "type": "PowerAdapter",
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    "stat": 0.004735999740660191
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  {
    "type": "Player",
    "error": "Player module is an alias of Media module",
    "stat": 0.0003920001909136772
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  {
    "type": "Media",
    "result": {
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        "name": "Whitney Houston - I Wanna Dance With Somebody (Official 4K Video)",
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        "status": "Paused"
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      "player": {
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    "type": "PublicIp",
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    "stat": 0.03409499954432249
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    "type": "LocalIp",
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      {
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  {
    "type": "DNS",
    "result": [
      "192.168.1.254",
      "2600:1702:528a:ae00::1"
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    "stat": 0.012309999205172062
  },
  {
    "type": "Wifi",
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    "stat": 0.04814799968153238
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  {
    "type": "DateTime",
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  {
    "type": "Locale",
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    "stat": 0.0012240000069141388
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  {
    "type": "Vulkan",
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  {
    "type": "OpenCL",
    "error": "clGetPlatformIDs() failed: CL_PLATFORM_NOT_FOUND_KHR",
    "stat": 0.15775500051677227
  },
  {
    "type": "Users",
    "result": [
      {
      }
    ],
    "stat": 0.052949000149965286
  },
  {
    "type": "Bluetooth",
    "result": [],
    "stat": 0.005021999590098858
  },
  {
    "type": "BluetoothRadio",
    "error": "Failed to open /sys/class/bluetooth",
    "stat": 0.0020739994943141937
  },
  {
    "type": "Sound",
    "result": [
      {
        "active": true,
        "main": true,
        "volume": 34,
        "name": "fifine Headset Analog Stereo",
        "identifier": "alsa_output.usb-3142_fifine_Headset-00.analog-stereo",
        "platformApi": "PipeWire 1.2.7"
      },
      {
        "active": true,
        "main": false,
        "volume": 52,
        "name": "Oland/Hainan/Cape Verde/Pitcairn HDMI Audio [Radeon HD 7000 Series] Digital Stereo (HDMI)",
        "identifier": "alsa_output.pci-0000_01_00.1.hdmi-stereo",
        "platformApi": "PipeWire 1.2.7"
      }
    ],
    "stat": 5.695787999778986
  },
  {
    "type": "Camera",
    "result": [
      {
        "name": "Depstech webcam: Depstech webca",
        "vendor": "",
        "colorSpace": "sRGB",
        "id": "usb-0000:00:1d.0-1.6.2",
        "width": 3840,
        "height": 2160
      }
    ],
    "stat": 57.90133299957961
  },
  {
    "type": "Gamepad",
    "result": [],
    "stat": 0.04458000045269728
  },
  {
    "type": "Mouse",
    "result": [
      {
        "serial": "",
        "name": "CX 2.4G Receiver Mouse"
      },
      {
        "serial": "",
        "name": "Nordic 2.4G Wireless Receiver Mouse"
      }
    ],
    "stat": 0.1439730003476143
  },
  {
    "type": "Keyboard",
    "result": [
      {
        "serial": "",
        "name": "Nordic 2.4G Wireless Receiver"
      },
      {
        "serial": "",
        "name": "CX 2.4G Receiver"
      }
    ],
    "stat": 0.18847199995070696
  },
  {
    "type": "Weather",
    "result": "+48°F - Overcast (Dallas, Texas, United States)",
    "stat": 0.0755179999396205
  },
  {
    "type": "NetIO",
    "result": [
      {
        "name": "enp3s0",
        "defaultRoute": true,
        "txBytes": 992,
        "rxBytes": 1430,
        "txPackets": 13,
        "rxPackets": 9,
        "rxErrors": 0,
        "txErrors": 0,
        "rxDrops": 0,
        "txDrops": 0
      }
    ],
    "stat": 0.3663459997624159
  },
  {
    "type": "DiskIO",
    "result": [
      {
        "name": "WD_BLACK SN850X 1000GB",
        "devPath": "/dev/nvme0n1",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      },
      {
        "name": "ATA OCZ-VERTEX3 MI",
        "devPath": "/dev/sdd",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      },
      {
        "name": "ATA WDC  WDS100T2B0A",
        "devPath": "/dev/sdb",
        "bytesRead": 0,
        "bytesWritten": 49152,
        "readCount": 0,
        "writeCount": 2
      },
      {
        "name": "HL-DT-ST BD-RE  WH12LS30",
        "devPath": "/dev/sr0",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      },
      {
        "name": "SanDisk Cruzer",
        "devPath": "/dev/sde",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      },
      {
        "name": "ATA WDC WD1002FAEX-0",
        "devPath": "/dev/sdc",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      },
      {
        "name": "ATA Samsung SSD 870",
        "devPath": "/dev/sda",
        "bytesRead": 0,
        "bytesWritten": 0,
        "readCount": 0,
        "writeCount": 0
      }
    ],
    "stat": 0.32174200005829334
  },
  {
    "type": "PhysicalDisk",
    "result": [
      {
        "name": "WD_BLACK SN850X 1000GB",
        "devPath": "/dev/nvme0n1",
        "interconnect": "NVMe",
        "kind": "SSD",
        "size": 1000204886016,
        "serial": "24171D800018",
        "removable": false,
        "readOnly": false,
        "revision": "620361WD",
        "temperature": 27.85
      },
      {
        "name": "ATA OCZ-VERTEX3 MI",
        "devPath": "/dev/sdd",
        "interconnect": "ATA",
        "kind": "SSD",
        "size": 120034123776,
        "serial": "",
        "removable": false,
        "readOnly": false,
        "revision": "2.25",
        "temperature": null
      },
      {
        "name": "ATA WDC  WDS100T2B0A",
        "devPath": "/dev/sdb",
        "interconnect": "ATA",
        "kind": "SSD",
        "size": 1000204886016,
        "serial": "",
        "removable": false,
        "readOnly": false,
        "revision": "40WD",
        "temperature": null
      },
      {
        "name": "HL-DT-ST BD-RE  WH12LS30",
        "devPath": "/dev/sr0",
        "interconnect": "ATA",
        "kind": "SSD",
        "size": 1073741312,
        "serial": "",
        "removable": true,
        "readOnly": false,
        "revision": "1.00",
        "temperature": null
      },
      {
        "name": "SanDisk Cruzer",
        "devPath": "/dev/sde",
        "interconnect": "USB",
        "kind": "HDD",
        "size": 8004304896,
        "serial": "",
        "removable": true,
        "readOnly": false,
        "revision": "1.26",
        "temperature": null
      },
      {
        "name": "ATA WDC WD1002FAEX-0",
        "devPath": "/dev/sdc",
        "interconnect": "ATA",
        "kind": "HDD",
        "size": 1000204886016,
        "serial": "",
        "removable": false,
        "readOnly": false,
        "revision": "1D05",
        "temperature": null
      },
      {
        "name": "ATA Samsung SSD 870",
        "devPath": "/dev/sda",
        "interconnect": "ATA",
        "kind": "SSD",
        "size": 1000204886016,
        "serial": "",
        "removable": false,
        "readOnly": false,
        "revision": "2B6Q",
        "temperature": null
      }
    ],
    "stat": 0.8371919998899102
  },
  {
    "type": "TPM",
    "error": "TPM device is not found",
    "stat": 0.004676999524235725
  },
  {
    "type": "Version",
    "result": {
      "projectName": "fastfetch",
      "sysName": "Linux",
      "architecture": "x86_64",
      "version": "2.38.0",
      "versionGit": "",
      "cmakeBuiltType": "RelWithDebInfo",
      "compileTime": "Mar  3 2025, 07:33:04",
      "compiler": "gcc 14.2.1",
      "debugMode": false,
      "libc": "glibc 2.41"
    },
    "stat": 0.001249999739229679
  },
  {
    "type": "Break",
    "error": "Unsupported for JSON format",
    "stat": 0.0006869994103908539
  },
  {
    "type": "Colors",
    "error": "Unsupported for JSON format",
    "stat": 0.0002849996089935303
  }
]

Features built-in

threads
vulkan
wayland
xcb-randr
xrandr
drm
drm_amdgpu
gio
dconf
dbus
imagemagick7
chafa
zlib
xfconf
egl
glx
osmesa
opencl
libpulse
libddcutil
libelf
libzfs
Directx Headers
System yyjson
linux/videodev2
linux/wireless

[CarterLi]

We use libddcutil to talk with monitors. Please test if command ddcutil works.

[Mshmaitelly]

Yes, ddcutil works fine.

dcutil -v detect                                                                                                                                                                                                                                                                     
Display 1
   I2C bus:  /dev/i2c-3
      DRM connector:                         card1-HDMI-A-1
      /sys/class/drm/card1-HDMI-A-1/dpms     On
      /sys/class/drm/card1-HDMI-A-1/enabled  enabled
      /sys/class/drm/card1-HDMI-A-1/status   connected
      /sys/class/drm/card1-HDMI-A-1/connector_id67
      Driver:                                i915
      EDID exists:                           true 
      I2C address 0x37 (DDC)  responsive:    true 
      Is LVDS or EDP display:                false
      Is laptop display by EDID:             false
      Is laptop display:                     false
      /sys/bus/i2c/devices/i2c-3/name        i915 gmbus dpc
      PCI device path:                       /sys/devices/pci0000:00/0000:00:02.0/i2c-3
   EDID synopsis:
      Mfg id:               DEL - Dell Inc.
      Model:                DELL U2412M
      Product code:         41082  (0xa07a)
      Serial number:        M2GCR161050L
      Binary serial number: 808792140 (0x3035304c)
      Manufacture year:     2011,  Week: 23
      EDID version:         1.3
      Extra descriptor:        
      Video input definition:    0x80 - Digital Input
      Supported features:
         DPMS standby
         DPMS suspend
         DPMS active-off
         Digital display type: RGB 4:4:4 + YCrCb 4:4:4
         Standard sRGB color space: False
      White x,y:        0.313, 0.329
      Red   x,y:        0.640, 0.330
      Green x,y:        0.300, 0.600
      Blue  x,y:        0.150, 0.060
      Extension blocks: 0
   EDID source: SYSFS
   EDID hex dump:
        +0          +4          +8          +c            0   4   8   c   
+0000   00 ff ff ff ff ff ff 00 10 ac 7a a0 4c 30 35 30   ..........z.L050
+0010   17 15 01 03 80 34 20 78 ea ee 95 a3 54 4c 99 26   .....4 x....TL.&
+0020   0f 50 54 a1 08 00 81 40 81 80 a9 40 b3 00 d1 c0   .PT....@...@....
+0030   01 01 01 01 01 01 28 3c 80 a0 70 b0 23 40 30 20   ......(<..p.#@0 
+0040   36 00 06 44 21 00 00 1a 00 00 00 ff 00 4d 32 47   6..D!........M2G
+0050   43 52 31 36 31 30 35 30 4c 0a 00 00 00 fc 00 44   CR161050L......D
+0060   45 4c 4c 20 55 32 34 31 32 4d 0a 20 00 00 00 fd   ELL U2412M. ....
+0070   00 32 3d 1e 53 11 00 0a 20 20 20 20 20 20 00 9a   .2=.S...      ..
   VCP version:         2.1
   Controller mfg:      RealTek
   Firmware version:    0.0
   Monitor uses invalid feature flag in DDC reply packet to indicate unsupported feature.
   Current dynamic sleep adjustment multiplier:  1.60
   Monitor Model Id:  DEL-DELL_U2412M-41082
   Feature definition file DEL-DELL_U2412M-41082.mccs not found.

Display 2
   I2C bus:  /dev/i2c-17
      DRM connector:                         card2-DP-4
      /sys/class/drm/card2-DP-4/dpms         On
      /sys/class/drm/card2-DP-4/enabled      enabled
      /sys/class/drm/card2-DP-4/status       connected
      /sys/class/drm/card2-DP-4/connector_id 56
      Driver:                                amdgpu
      EDID exists:                           true 
      I2C address 0x37 (DDC)  responsive:    true 
      Is LVDS or EDP display:                false
      Is laptop display by EDID:             false
      Is laptop display:                     false
      /sys/bus/i2c/devices/i2c-17/name       card2-DP-4
      PCI device path:                       /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card2/card2-DP-4/i2c-17
   EDID synopsis:
      Mfg id:               SAM - Samsung Electric Company
      Model:                C34J79x
      Product code:         3869  (0x0f1d)
      Serial number:        HNTW400793
      Binary serial number: 809056048 (0x30393730)
      Manufacture year:     2023,  Week: 15
      EDID version:         1.4
      Extra descriptor:        
      Video input definition:    0xa5 - Digital Input (DisplayPort), Bit depth: 8
      Supported features:
         DPMS active-off
         Digital display type: RGB 4:4:4 + YCrCb 4:4:4 + YCrCb 4:2:2
         Standard sRGB color space: True
      White x,y:        0.313, 0.329
      Red   x,y:        0.680, 0.312
      Green x,y:        0.262, 0.662
      Blue  x,y:        0.149, 0.058
      Extension blocks: 1
   EDID source: SYSFS
   EDID hex dump:
        +0          +4          +8          +c            0   4   8   c   
+0000   00 ff ff ff ff ff ff 00 4c 2d 1d 0f 30 37 39 30   ........L-..0790
+0010   0f 21 01 04 a5 50 21 78 3b 02 75 ae 50 43 a9 26   .!...P!x;.u.PC.&
+0020   0e 50 54 bf ef 80 71 4f 81 00 81 c0 81 80 95 00   .PT...qO........
+0030   a9 c0 b3 00 01 01 4e d4 70 a0 d0 a0 46 50 30 20   ......N.p...FP0 
+0040   3a 00 1d 4d 31 00 00 1a 00 00 00 fd 00 30 64 98   :..M1........0d.
+0050   98 37 01 0a 20 20 20 20 20 20 00 00 00 fc 00 43   .7..      .....C
+0060   33 34 4a 37 39 78 0a 20 20 20 20 20 00 00 00 ff   34J79x.     ....
+0070   00 48 4e 54 57 34 30 30 37 39 33 0a 20 20 01 78   .HNTW400793.  .x
   VCP version:         2.1
   Controller mfg:      Novatek
   Firmware version:    1.32
   Monitor uses invalid feature flag in DDC reply packet to indicate unsupported feature.
   Current dynamic sleep adjustment multiplier:  1.30
   Monitor Model Id:  SAM-C34J79x-3869
   Feature definition file SAM-C34J79x-3869.mccs not found.

[Mshmaitelly]

What ddcutil commands should I test?