从此处的 Brother 站点下载并安装了 linux 驱动程序。
但扫描仪仍然无法识别。
可以看到，驱动安装成功：
$ dpkg -l | grep Brother
ii brother-cups-wrapper-common 1.0.0-10-0ubuntu6 amd64 Common files for Brother cups wrapper packages
ii brother-udev-rule-type1 1.0.0-1 all Brother udev rule type 1
ii brscan-skey 0.2.4-1 amd64 Brother Linux scanner S-KEY tool
ii brscan2 0.2.5-1 amd64 Brother Scanner Driver
ii printer-driver-brlaser 3-5~ubuntu1 amd64 printer driver for (some) Brother laser printers
ii printer-driver-ptouch 1.4-1 amd64 printer driver Brother P-touch label printers
在这里，您可以看到已安装的驱动程序认为它未“注册”：
$ brscan-skey -l
DCP-350C : brother2:bus3;dev1 : …我有佳能 Pixma G3012 多合一无线墨水盒彩色打印机
我正在尝试使用简单的扫描软件从安装了 Linux Ubuntu 18 的 PC 扫描文档。
通过 USB 将设备连接到 PC 并打开电源。打开简单的扫描软件并尝试扫描文档。但收到消息“没有可用的扫描仪，请连接扫描仪”
已安装名为scangearmp2-3.30-1-deb.tar.gz.
使用命令sane-find-scanner并得到以下结果
found USB scanner (vendor=0x04a9 [Canon], product=0x183b [G3010 series]) at libusb:001:004
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
发出命令 scanimage -L并得到以下结果。
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on …lsusb 和 sane-find-scanner 的输出如下：
janos@AndrasXubuntu:~/Desktop$ 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.
found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
could not open USB …使用 Xubuntu 15.10、Simple Scan 3.18.1，默认文件类型是 PDF，即使对于图像也是如此。我想将其设置为 PNG，可以吗？
有一个相关的旧问题，使用解决方案从 JPG 更改为 PDF，将扫描从图像 (JPG) 切换到文本 (PDF)简单扫描 - 将默认输出文件类型更改为 PDF 并改进压缩？但我已经使用过图像，JPG 也不是解决方案。
我在 ~/.config 中没有找到一个看起来负责简单扫描的配置文件，并且设置菜单非常少。