Ubuntu 无法检测到我的扫描仪

Question

Ubuntu 16.04，GNOME。不知道为什么，但简单扫描停止工作 - 首先，错误“未找到设备”，重新安装最新版本的 hplip 并配置后，这个问题解决了。但在尝试按下扫描按钮或运行 scanimage -L 后，仍然会出现无限等待（简单扫描中带有移动圆圈的动画）。我在 Google 上搜索了很多，但都没有用。

lsusb：

Bus 003 Device 011: ID 03f0:042a Hewlett-Packard LaserJet M1132 MFP

理智查找扫描仪：

  # 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=0x03f0 [Hewlett-Packard], product=0x042a [HP LaserJet Professional M1132 MFP]) at libusb:003:011
could not fetch string descriptor: Pipe error
  # 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.

那么，我该怎么办？据我所见，/etc/hp/hplip.conf 不包含任何有用的信息。文件的所有者是我，而不是 root。