Hello, I got my hands on the Epson Expression636 which comes with both SCSI and parallel ports. W/o SCSI on my RedHat8 box, I tried the parallel port. Scanning works if I'm root (Yes!!) but not as a regular user. This my diagnostics:
SANE_DEBUG_EPSON=9 scanimage -d epson:0x378 > pnm.out [sanei_debug] Setting debug level of epson to 9. [epson] sane_init: sane-backends 1.0.8 [epson] sane_init, ># epson.conf< [epson] sane_init, >#< [epson] sane_init, ># here are some examples for how to configure the EPSON backend< [epson] sane_init, >#< [epson] sane_init, ># SCSI scanner:< [epson] sane_init, >#scsi EPSON< [epson] sane_init, >#< [epson] sane_init, ># Parallel port scanner:< [epson] sane_init, >#pio 0x278< [epson] sane_init, >pio 0x378< [epson] sane_init, >pio 0x378< [epson] attach(pio 0x378) [epson] SANE Epson Backend v0.2.21 - 2002-04-22 [epson] attach(pio 0x378) [epson] attach: opening pio 0x378 [epson] dev_open: Invalid argument: can't open 0x378 as a parallel-port device [epson] sane_init, >#pio 0x3BC< [epson] sane_init, >#< [epson] sane_init, ># USB scanner - only enable this if you have an EPSON scanner. It could< [epson] sane_init, ># otherwise block your non-EPSON scanner from being< [epson] sane_init, ># recognized.< [epson] sane_init, ># Depending on your distribution, you may need either the< [epson] sane_init, ># first or the second entry.< [epson] sane_init, >#usb /dev/usb/scanner0< [epson] sane_init, >#usb /dev/usb/scanner0< [epson] sane_open(0x378) [epson] SANE Epson Backend v0.2.21 - 2002-04-22 [epson] attach(0x378) [epson] attach: opening 0x378 [epson] dev_open: Error during device I/O: can't open 0x378 as a parallel-port device scanimage: open of device epson:0x378 failed: Error during device I/O Seeing that /dev/lp0 has rw access by root.lp, I added myself to the lp group to no effect. I suspect the Epson backend is using some direct write to the binary address bypassing /dev/lp0. Searching the archive and Google yielded nothing. Thanks for your help. Best, Petr
