DELL 2355dn User Manual

The printer does not appear 

on the scanners list.

• Check if your printer is attached to your computer. Ensure that it is connected properly via 

the USB port and is turned on.

• Check if the scanner driver for your printer is installed in your system. Open MFP 

Configurator, switch to Scanners configuration, then press Drivers. Ensure that driver with 

a name corresponding to your printer's name is listed in the window.

• Check if the MFP port is not busy. Since functional components of MFP (printer and 

scanner) share the same I/O interface (MFP port), the situation of simultaneous access of 

different “consumer” application to the same MFP port is possible. To avoid possible 

conflicts, only one of them at a time is allowed to gain control over the device. The other 

“consumer” will encounter “device busy” response. This can usually happen while starting 

scan procedure, and appropriate message box appears.

• To identify the source of the problem, you should open MFP ports configuration and select 

the port assigned to your scanner. MFP port's symbol /dev/mfp0 corresponds to LP:0 

designation displayed in the scanners’ options, /dev/mfp1 relates to LP:1 and so on. USB 

ports start at /dev/mfp4, so scanner on USB:0 relates to /dev/mfp4 respectively and so forth 

sequentially. In the Selected port pane you can see if the port is occupied by some other 

application. If this is the case, you should wait for completion of the current job or should 

press Release port button, if you are sure that the present port's owner is not functioning 

properly.

The printer doesn’t scan.

• Check if a document is loaded into the printer.
• Check if your machine is connected to the computer. Ensure that if it is connected 

properly if I/O error is reported while scanning.

• Check if MFP port is not busy. Since functional components of MFP (printer and scanner) 

share the same I/O interface (MFP port), the situation of simultaneous access of different 

"consumer" application to the same MFP port is possible. To avoid possible conflicts, only 

one of them at a time is allowed to gain control over the device. The other "consumer" will 

encounter "device busy" response. This can usually happen while starting scan procedure, 

and appropriate message box will be displayed. 
To identify the source of the problem, you should open MFP ports configuration and select 

the port assigned to your scanner. MFP port's symbol /dev/mfp0 corresponds to LP:0 

designation displayed in the scanners' options, /dev/mfp1 relates to LP:1 and so on. USB 

ports start at /dev/mfp4, so scanner on USB:0 relates to /dev/mfp4 respectively and so forth 

sequentially. In the Selected port pane you can see if the port is occupied by some other 

application. If this is the case, you should wait for completion of the current job or should 

press Release port button, if you are sure that the present port's owner is not functioning 

properly.

I can’t print when I installed 

both Linux Print Package 

(LPP) and MFP driver on 

the same machine 

simultaneously.

• Since both Linux Printer Package and MFP driver make a symbolic link to "lpr" printing 

command, which is commonly used on Unix clones, it is not recommended to use both 

package on the same machine.