xerox_mfp: Xerox WC 3220 fails to scan from flatbed in color, from ADF in any mode

Just tried to scan from Xerox WorkCentre 3220 over USB with debian's SANE 1.0.14-17 + !799 (merged) + !797 (merged) + !655 (merged)

Scanning from flatbed grayscale 75 DPI, 200 DPI, 300 DPI works without issues
Scanning from flatbed in color at 200 DPI, 300 DPI fails near the end
Scanning from ADF stops halfway

The latest issue may be related to #729. I tried to apply the patch and comment usb comparison code (so the modified code would apply to USB connections), but it also fails (in some other way).

Unfortunately could not capture the USB pcap and could not gather debug information. More to come latter.

Edited Feb 19, 2024 by ValdikSS

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