I cannot account for your experience with hp-scan. Using it with a USB-connected PSC 1300 here does no such thing. Altering models.dat? That shouldn't be needed as it has "plugin=0". Try xsane or simple-scan.
This is immediately followed by the 409 because a request is made which conflicts with max_width. My thinking is that bb_escl.c has it wrong. The max_width here is 2550. I can give you a command if you want to find what it is for your device, but the device has to be on the network.
I cannot account for your experience with hp-scan. Using it with a USB-connected PSC 1300 here does no such thing. Altering models.dat? That shouldn't be needed as it has "plugin=0". Try xsane or simple-scan.
In your journalctl there is the line
bb_escl.c 1558: Requested_width = [2550], max_width = [2549]
This is immediately followed by the 409 because a request is made which conflicts with max_width. My thinking is that bb_escl.c has it wrong. The max_width here is 2550. I can give you a command if you want to find what it is for your device, but the device has to be on the network.
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Brian.