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理智，即使我添加了 udev 规则，也找不到我的扫描仪（权限问题），除非我使用 sudo

tag-icon • tag-icon sudo udev scanner sane canon
理智，即使我添加了 udev 规则，也找不到我的扫描仪（权限问题），除非我使用 sudo

我的 AIO 打印机/扫描仪是 Canon E400，但我作为普通用户找不到我的扫描仪，只能使用 sudo & scan 也可以使用 sudo

~ cincinmasukmangkok@orangepizero
< sane-find-scanner                                                                                                       <<<

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

could not open USB device 0x1d6b/0x0001 at 008:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 005:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 007:001: Access denied (insufficient permissions)
could not open USB device 0x04a9/0x177a at 004:007: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 004:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 006:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 003:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 002:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 001:001: Access denied (insufficient permissions)
  # No USB scanners found. If you expected something different, make sure that
  # you have loaded a kernel driver for your USB host controller and have setup
  # the USB system correctly. See man sane-usb for details.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.

~ cincinmasukmangkok@orangepizero
> scanimage -L

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).

~ cincinmasukmangkok@orangepizero
< sudo sane-find-scanner                                                                                                  <<< [sudo] password for cincinmasukmangkok:

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x04a9 [Canon], product=0x177a [E400 series]) at libusb:004:007
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

~ cincinmasukmangkok@orangepizero
< sudo scanimage --format=png > test.png                                                                                  <<<

~ cincinmasukmangkok@orangepizero 33s
>

我还将其添加到 /lib/udev/rules.d/60-libsane.rules 但它仍然不起作用

SUBSYSTEM=="usb", ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="177a", MODE="0664", GROUP="scanner", ENV{libsane_matched}="yes"

答案1

通过添加这一行来解决这个问题/lib/udev/rules.d/10-local.rules

ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="177a", MODE="0666"

答案2

我将帐户添加到scanner，，lp。saned但仅此一点并没有帮助。我没有任何这些规则文件，所以我的解决方案是sudo chmod -R a+w /dev/bus/usb。然后您可以检查一下sane-find-scanner是否可以使用普通用户帐户找到它。

然后我添加/创建了rc.local包含以下内容的文件：

#!/bin/sh -e
chmod -R a+w /dev/bus/usb
exit 0

然后我设置了sudo chmod +x rc.local。

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