N6350 is not found by Ubuntu sane.

[ErnyCowan]

I cannot get my N6350 recognized by my UBUNTU 24.04 LTS system.

It uses sane to handle scanners.
sane-find-scanner can see the N6350 when it i attached via USB but scanimage -L does not.

I have added to /etc/udev/rules.d to give permission for access to the N6350. That worked. But still scanimage -L cannot se it. Even sudo scanimage-l does not work.

I also added usb 0x3f0 0x4805 to /etc./rules.d/hp.conf. Didn't help.

I had an HP-8250 that worked very well for a long time.

[M_Salman]

Hi @ErnyCowan,

If your HP Scanjet N6350 is not recognized by scanimage -L on your Ubuntu system despite being detected by sane-find-scanner, follow these troubleshooting steps carefully:

Step 1: Verify USB Connection

• Ensure that the USB cable is securely connected to both the scanner and the computer.
• Try using a different USB port on your computer to see if the issue persists.

Step 2: Check Udev Rules

• Verify that you have the correct udev rules in /etc/udev/rules.d/ to provide access permissions for the scanner.
• The content for udev file should be correct, else create or verify the rules with appropriate permissions.

Step 3: Validating hp.conf Configuration

• Make sure you have added the correct USB identifiers in the hp.conf file under /etc/sane.d/.
• Add a line for the device using the vendor and product IDs, for example: usb 0x03f0 0x4805.

Step 4: Reboot the System

• Sometimes, changes to these configurations only take effect after a reboot, so restart your Ubuntu system.

Step 5: Update SANE Backends

• Ensure you have the latest version of SANE backends, as older versions might not support newer devices properly.

Step 6: Running SANE As Superuser

• Although not recommended for regular operation, use sudo scanimage -L to test if it recognizes the scanner, indicating permission issues.

Additional Steps:

• If you had success with another HP Scanner (such as HP-8250), compare setup and configurations to identify any discrepancies.
• Consult with the SANE project's documentation or community forums for additional support and device-specific tweaks.

Check out the HP Support page for detailed guides and firmware updates related to your scanner model.