I've applied all the parameters describe in the faq.
I think it's the driver epsonusb.device is not up to date for the scanner 3490. In conclusion, it would be correct to compile a new driver betascan with a recent "sane" support. I'm a software developper but i never wrote a driver.
Fortunately, there is a documentation and source for iousb source to recompile a betascan driver. If someone is capable to compile a new driver epsonusb i will safe.
For now, i'm studying the possibility to recompile myself a new driver. In the sane's documentation, the support for my scanner is a snapscan driver (for agfa and a small number of other scanner). It's strange isn't it ?
it appears that in iousb documentation, the drivers was compiled with SAS/C 6.58. I have'nt SAS/C but GCC and cubic. Do you know if i can use this for compilation ?
Thanks in advance for you're responses.
Pegasos II G4 @ 1 ghz Radeon 7000