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Jul 6th, 2014
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  1.  
  2. Udevadm info starts with the device specified by the devpath and then
  3. walks up the chain of parent devices. It prints for every device
  4. found, all possible attributes in the udev rules key format.
  5. A rule to match, can be composed by the attributes of the device
  6. and the attributes from one single parent device.
  7.  
  8. looking at device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.2/input/input7/js0':
  9. KERNEL=="js0"
  10. SUBSYSTEM=="input"
  11. DRIVER==""
  12.  
  13. looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.2/input/input7':
  14. KERNELS=="input7"
  15. SUBSYSTEMS=="input"
  16. DRIVERS==""
  17. ATTRS{phys}=="usb-0000:00:1d.0-1.5/input2"
  18. ATTRS{uniq}==""
  19. ATTRS{properties}=="0"
  20.  
  21. looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.2':
  22. KERNELS=="2-1.5:1.2"
  23. SUBSYSTEMS=="usb"
  24. DRIVERS=="usbhid"
  25. ATTRS{bInterfaceClass}=="03"
  26. ATTRS{bInterfaceSubClass}=="00"
  27. ATTRS{bInterfaceProtocol}=="00"
  28. ATTRS{bNumEndpoints}=="01"
  29. ATTRS{supports_autosuspend}=="1"
  30. ATTRS{bAlternateSetting}==" 0"
  31. ATTRS{bInterfaceNumber}=="02"
  32.  
  33. looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5':
  34. KERNELS=="2-1.5"
  35. SUBSYSTEMS=="usb"
  36. DRIVERS=="usb"
  37. ATTRS{bDeviceSubClass}=="00"
  38. ATTRS{bDeviceProtocol}=="00"
  39. ATTRS{devpath}=="1.5"
  40. ATTRS{idVendor}=="045e"
  41. ATTRS{speed}=="12"
  42. ATTRS{bNumInterfaces}==" 3"
  43. ATTRS{bConfigurationValue}=="1"
  44. ATTRS{bMaxPacketSize0}=="64"
  45. ATTRS{busnum}=="2"
  46. ATTRS{devnum}=="3"
  47. ATTRS{configuration}==""
  48. ATTRS{bMaxPower}=="100mA"
  49. ATTRS{authorized}=="1"
  50. ATTRS{bmAttributes}=="a0"
  51. ATTRS{bNumConfigurations}=="1"
  52. ATTRS{maxchild}=="0"
  53. ATTRS{bcdDevice}=="0757"
  54. ATTRS{avoid_reset_quirk}=="0"
  55. ATTRS{quirks}=="0x0"
  56. ATTRS{version}==" 2.00"
  57. ATTRS{urbnum}=="85947"
  58. ATTRS{ltm_capable}=="no"
  59. ATTRS{manufacturer}=="Microsoft"
  60. ATTRS{removable}=="removable"
  61. ATTRS{idProduct}=="07a5"
  62. ATTRS{bDeviceClass}=="00"
  63.  
  64. looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1':
  65. KERNELS=="2-1"
  66. SUBSYSTEMS=="usb"
  67. DRIVERS=="usb"
  68. ATTRS{bDeviceSubClass}=="00"
  69. ATTRS{bDeviceProtocol}=="01"
  70. ATTRS{devpath}=="1"
  71. ATTRS{idVendor}=="8087"
  72. ATTRS{speed}=="480"
  73. ATTRS{bNumInterfaces}==" 1"
  74. ATTRS{bConfigurationValue}=="1"
  75. ATTRS{bMaxPacketSize0}=="64"
  76. ATTRS{busnum}=="2"
  77. ATTRS{devnum}=="2"
  78. ATTRS{configuration}==""
  79. ATTRS{bMaxPower}=="0mA"
  80. ATTRS{authorized}=="1"
  81. ATTRS{bmAttributes}=="e0"
  82. ATTRS{bNumConfigurations}=="1"
  83. ATTRS{maxchild}=="8"
  84. ATTRS{bcdDevice}=="0000"
  85. ATTRS{avoid_reset_quirk}=="0"
  86. ATTRS{quirks}=="0x0"
  87. ATTRS{version}==" 2.00"
  88. ATTRS{urbnum}=="34"
  89. ATTRS{ltm_capable}=="no"
  90. ATTRS{removable}=="fixed"
  91. ATTRS{idProduct}=="0024"
  92. ATTRS{bDeviceClass}=="09"
  93.  
  94. looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2':
  95. KERNELS=="usb2"
  96. SUBSYSTEMS=="usb"
  97. DRIVERS=="usb"
  98. ATTRS{bDeviceSubClass}=="00"
  99. ATTRS{bDeviceProtocol}=="00"
  100. ATTRS{devpath}=="0"
  101. ATTRS{idVendor}=="1d6b"
  102. ATTRS{speed}=="480"
  103. ATTRS{bNumInterfaces}==" 1"
  104. ATTRS{bConfigurationValue}=="1"
  105. ATTRS{bMaxPacketSize0}=="64"
  106. ATTRS{authorized_default}=="1"
  107. ATTRS{busnum}=="2"
  108. ATTRS{devnum}=="1"
  109. ATTRS{configuration}==""
  110. ATTRS{bMaxPower}=="0mA"
  111. ATTRS{authorized}=="1"
  112. ATTRS{bmAttributes}=="e0"
  113. ATTRS{bNumConfigurations}=="1"
  114. ATTRS{maxchild}=="2"
  115. ATTRS{bcdDevice}=="0313"
  116. ATTRS{avoid_reset_quirk}=="0"
  117. ATTRS{quirks}=="0x0"
  118. ATTRS{serial}=="0000:00:1d.0"
  119. ATTRS{version}==" 2.00"
  120. ATTRS{urbnum}=="24"
  121. ATTRS{ltm_capable}=="no"
  122. ATTRS{manufacturer}=="Linux 3.13.0-30-generic ehci_hcd"
  123. ATTRS{removable}=="unknown"
  124. ATTRS{idProduct}=="0002"
  125. ATTRS{bDeviceClass}=="09"
  126. ATTRS{product}=="EHCI Host Controller"
  127.  
  128. looking at parent device '/devices/pci0000:00/0000:00:1d.0':
  129. KERNELS=="0000:00:1d.0"
  130. SUBSYSTEMS=="pci"
  131. DRIVERS=="ehci-pci"
  132. ATTRS{irq}=="23"
  133. ATTRS{subsystem_vendor}=="0x1458"
  134. ATTRS{broken_parity_status}=="0"
  135. ATTRS{class}=="0x0c0320"
  136. ATTRS{companion}==""
  137. ATTRS{enabled}=="1"
  138. ATTRS{consistent_dma_mask_bits}=="32"
  139. ATTRS{dma_mask_bits}=="32"
  140. ATTRS{local_cpus}=="00000000,00000000,00000000,00000000,00000000,00000000,00000000,0000000f"
  141. ATTRS{device}=="0x1e26"
  142. ATTRS{uframe_periodic_max}=="100"
  143. ATTRS{msi_bus}==""
  144. ATTRS{local_cpulist}=="0-3"
  145. ATTRS{vendor}=="0x8086"
  146. ATTRS{subsystem_device}=="0x5006"
  147. ATTRS{numa_node}=="-1"
  148. ATTRS{d3cold_allowed}=="1"
  149.  
  150. looking at parent device '/devices/pci0000:00':
  151. KERNELS=="pci0000:00"
  152. SUBSYSTEMS==""
  153. DRIVERS==""
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