Re: SANE with Samsung SCX-4x21F Getting IO Error

Hi,

On 2024-01-14 06:20, sqe6nouc--- via sane-devel wrote:
> Hello,
>
> I am currently trying to get SANE to scan with a Samsung SCX-4x21F MFP 
> on Arch Linux.
>
> I have sane 1.2.1-5 and xsane 0.999-6 on kernel 6.6.10-arch1-1 (KDE 
> Plasma Wayland) with the following driver packages:
>
> samsung-unified-driver 1.00.39-7
> samsung-unified-driver-common 1.00.39-7
> samsung-unified-driver-printer 1.00.39-7
> samsung-unified-driver-scanner 1.00.39-7
>
> dmesg:
>
> [75005.102178] usb 3-9: new full-speed USB device number 6 using xhci_hcd
> [75005.245210] usb 3-9: New USB device found, idVendor=04e8, 
> idProduct=3419, bcdDevice= 1.00
> [75005.245235] usb 3-9: New USB device strings: Mfr=1, Product=2, 
> SerialNumber=3
> [75005.245245] usb 3-9: Product: SCX-4x21 Series
> [75005.245248] usb 3-9: Manufacturer: Samsung
> [75005.245249] usb 3-9: SerialNumber: <serial redacted>.
> [75005.926529] usblp 3-9:1.1: usblp0: USB Bidirectional printer dev 6 
> if 1 alt 0 proto 2 vid 0x04E8 pid 0x3419
> [75005.926577] usbcore: registered new interface driver usblp
>
> Error I am getting:
> Failed to start scanner: Error during device I/O
>
> If I wait a bit then click scan again, it starts scanning, however the 
> scan head stuck at the end of the flatbed and XSane hangs for a bit 
> then the following error is shown:
> Error during read: Error during device I/O
>
> After this, the scan head is still stuck at the end of the flatbed
>
> Any help would be appreciated. Thank you.
>

I wonder why the xerox_mfp backend wouldn't provide you with support for 
this device. You have a very recent version of the backends and it is 
supposed to be supported.
Could you show us the output of:

scanimage -L

Cheers,
Ralph