installed scanimage and newly compiled sane-find-scanner finds scanner but newly compiled scanimage does not

I have compiled from the latest source.

The pre-installed scanimage in /usr/bin works fine, but the version I just compiled does not detect the scanner, even when run as root from the compilation directory, e.g. frontend/scanimage. I have compiled with the proper driver that I need, and when I run frontend/sane-find-scanner from the compilation directory it finds the scnaner.

I don’t want to install this version because I am just doing some testing, but I am concerned whether this could be the reason for the failure.

Lubuntu 18.04 LTS 64 bit: ricoh sp 211 scanner not working

I have a problem with multifunction printer-scanner ricoh sp 211 su. I installed the driver r78188en.exe that is a Linux SANE Scanner Driver and contains sp-200series_Scanner-1.01-noarch. The printer is detected and it works after that I installed it by adding a printer with a generic driver. The scanner does not work and both xsane and simple-scan do not detect it. The device is detected as stated by lusb and sane-find-scanner:

lsusb  Bus 002 Device 002: ID 058f:a001 Alcor Micro Corp.  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 05ca:044f Ricoh Co., Ltd  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub  sudo 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=0x05ca [RICOH ], product=0x044f [RICOH SP 211SU]) at libusb:001:002 # 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. 

while it is not detected by

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). 

I already installed sudo apt install libsane-extras and manually changed the file /lib/udev/rules.d/60-libsane1.rules by adding the following lines:

# Ricoh SP 211 ATTRS{idVendor}=="05ca", ATTRS{idProduct}=="044f", MODE="664", GROUP="scanner", ENV{libsane_matched}="yes" 

and the file /etc/sane.d/ricoh.conf by adding:

usb 0x05ca 0x044f 

The scanner still does not work. Do you have any idea?

Thank you in advance.

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What does Finder (10.12) and IP Scanner require to run?

I am working on creating a macOS 10.12 Live USB, and need to know what /System/Library/Frameworks/ frameworks Finder and IP Scanner requires (and how do I install them/track all of their files down)?

I’m making a macOS 10.12 Live creator based on dosdude1’s macOS Sierra Patcher, with a few changes (such as what gets moved onto the installer). Any help would be greatly appreciated.

Zxing QR code scanner code is not working in a fragment

I am trying to develop QR code scanner App using Zxing library in Kotlin. I am able to open the camera and scan the QR code but not getting response.

I also tried this tutorials https://tutorialwing.com/implement-android-qr-code-scanner-using-zxing-library-in-kotlin/ for implementation but did not got helped.

     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {         return inflater.inflate(R.layout.fragment_home, container, false)     }     override fun onActivityCreated(savedInstanceState: Bundle?) {         super.onActivityCreated(savedInstanceState)         val mScanner = IntentIntegrator(activity)         mScanner.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)         mScanner.setBeepEnabled(true)         mScanner.initiateScan()      }     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {         val result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data)         if (result != null) {             if (result.contents == null) {                 Toast.makeText(activity, "Cancelled", Toast.LENGTH_LONG).show()             } else {                 Toast.makeText(activity, "Scanned: " + result.contents, Toast.LENGTH_LONG).show()             }         } else {             super.onActivityResult(requestCode, resultCode, data)         }     } }  I want to get response in a toast but when I tried to use debugger I am unable to go to onActivityResult() and the camera closes quickly. 

Network scanner no longer visible on Ubuntu 18.04

After installing recent updates my network scanner (Samsung MFC) stopped working. My scanner was working until few days ago.

Now the scanner cannot be detected by any scanning program (gscan2pdf, xsane, etc.):

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). 

However addressing the network device directly works:

scanimage -d "smfp:net;192.168.100.5" --format tiff > /tmp/a.tiff  

It properly scans a page.

What can I do to make the detection work again?