I tested 1650 with 60 seconds timeout. It works correct with resolution up to 3200. I have question about frontend. I scan negative film using xsane 0.84, sane 1.0.5, epson backend 0.2.19. I discover more natural color if I use iscan 1.0.1 with backend 0.3.00 from http://www.epkowa.co.jp His frontend doesn't so userfriendly as xsane. For example I need to repeat preview scan after scan each shot. It also scan again when I want zoom.
Karl Heinz Kremer wrote: > This makes sense ... Thansk for digging deep into the scanner > module and figuring this out. Did you try a timeout that's > closer to the 40 seconds, like 60 or 80 seconds? 160 Seconds > sounds pretty long to me and no operation should take that > long until the scaner starts to send data. This timeout is > only for the time between a read operation was started, and > the first data arrives from the scanner (actually until the > first buffer is filled and returned). > > So for now the workaround is to specify the time as module > parameter. > > I'll talk to David Nelson (the author of the scanner driver) > about this. > > Thanks again, > > Karl Heinz > > Sergey Smirnov <[email protected]> said: > > >>I found that problem in scanner.c kernel driver. >>I increase NAK value for 1650 in scanner.h: >>#define RD_NAK_TIMEOUT (160*HZ) >>But scanner.c reset this value back to 40*HZ >>... >>switch (dev->descriptor.idVendor) { /* Scanner specific read timeout >> > parameters */ > >> case 0x04b8: /* Seiko/Epson */ >> scn->rd_nak_timeout = HZ * 40; >>... >>I have tested 1650 with rd_nak_timeout = HZ * 160. >>I work fine with max resolution 3200. >>Other way compile scanner as module and install it with >> > read_timeout=160*100: > >># insmod scanner read_timeout=16000 >> >>Willy Gardiol wrote: >> >>>Hi! >>> >>>this is exactly my problem! >>>i think it is a bug in the scanner.o driver because i can perfectly scan >>>negatives at 1600 dpi under Windows2000 emulated under WMVare (so using >>> > huci > >>>driver). My kernel is 2.4.17 >>> >>> >>>On Monday 11 February 2002 12:11, Sergey Smirnov wrote: >>> >>> >>>>I tried with both drivers: >>>>uhci and usb-uhci. >>>>I use USB Controller: Intel Corp. 82371AB PIIX4 USB (rev 01) >>>> >>>>Karl Heinz Kremer wrote: >>>> >>>> >>>>>One more question: What USB host controller are you using (OHCI or UHCI), >>>>>and which driver? There are two for UHCI: uhci and usb-uhci. Somebody >>>>>just reported performance issues with the uhci driver. If this is >>>>>what you are using, you may want to try the other one. >>>>> >>>>>Karl Heinz >>>>> >>>>>On Thu, Feb 07, 2002 at 03:57:09PM +0300, Sergey Smirnov wrote: >>>>> >>>>> >>>>>>Karl, >>>>>>I'm using Debian unstable with kernel 2.4.18-pre8, sane 1.0.7(epson >>>>>>backend 0.2.19, xsane 0.84 >>>>>>I have increased timeout up to 160 >>>>>>#define RD_NAK_TIMEOUT (160*HZ) >>>>>>I also tried with SANE_DEBUG_EPSON=64 >>>>>>... >>>>>>[epson] receive buf, expected = 4, got = 4 >>>>>>[epson] receive buf, expected = 45, got = 45 >>>>>>[epson] SANE_START: color: 19 >>>>>>[epson] SANE_START: resolution (x, y): (1600, 1600) >>>>>>[epson] SANE_START: area[dots] (x-offset, y-offset), (x-range, y-range): >>>>>>(765, 9900), (1488, >>>>>>2273) >>>>>>[epson] SANE_START: data format: 16 >>>>>>[epson] SANE_START: halftone: 0 >>>>>>[epson] SANE_START: brightness: 0 >>>>>>[epson] SANE_START: gamma: 2 >>>>>>[epson] SANE_START: zoom[percentage] (x, y): (100, 100) >>>>>>[epson] SANE_START: color correction: 128 >>>>>>[epson] SANE_START: outline emphasis: 0 >>>>>>[epson] SANE_START: read mode: 0 >>>>>>[epson] SANE_START: mirror image: 0 >>>>>>[epson] SANE_START: (new B6 or B7 command ESC s): 0 >>>>>>[epson] SANE_START: (new B6 or B7 command ESC t): 128 >>>>>>[epson] SANE_START: line counter: 3 >>>>>>[epson] SANE_START: extension control: 1 >>>>>>[epson] SANE_START: (new B6 or B7 command ESC N): 1 >>>>>>[epson] send buf, size = 2 >>>>>>[epson] sane_get_parameters() >>>>>>[epson] Preview = 0 >>>>>>[epson] Resolution = 1600 >>>>>>[epson] get para 0x80fbe80 0x80fc528 tlx 12.143967 tly 157.164154 brx >>>>>>35.803833 bry 193.255493 [mm] >>>>>>[epson] sane_read: begin >>>>>>[epson] sane_read: begin scan1 >>>>>>[epson] error in receive - status = 5 >>>>>>[epson] receive buf, expected = 6, got = -1 >>>>>>... >>>>>>Thank's. >>>>>> >>>>>> >>>>>> >>>>>>>Sergey, >>>>>>> >>>>>>>which Linux distribution are you using? What kernel and >>>>>>>Sane version? >>>>>>> >>>>>>>You probably have some messages on your console about >>>>>>>USB timeouts after this happens. The reason is very likely >>>>>>>that your kernel is too old and does not have the increased >>>>>>>timeout for USB scanner transmissions. >>>>>>> >>>>>>>Please see my page at http://www.khk.net/sane/faq.html for >>>>>>>more information. >>>>>>> >>>>>>>Karl Heinz >>>>>>> >>>>>>>Sergey Smirnov <[email protected]> said: >>>>>>> >>>>>>> >>>>>>>>Hi, >>>>>>>>I have problem with Epson Perfection 1650. >>>>>>>>I can't scan negative film with resolution more than 1200. >>>>>>>>I/o error and only power off reset scanner. >>>>>>>>-- >>>>>>>>Sergey Smirnov >>>>>>>>_______________________________________________ >>>>>>>>Sane-devel mailing list >>>>>>>>[email protected] >>>>>>>>http://www.mostang.com/mailman/listinfo/sane-devel >>>>>>>> >>>>>>>> >>>>>>-- >>>>>>Sergey Smirnov >>>>>> >>>>>> >>>_______________________________________________ >>>Sane-devel mailing list >>>[email protected] >>>http://www.mostang.com/mailman/listinfo/sane-devel >>> >>> >>-- >>Sergey Smirnov >> >>_______________________________________________ >>Sane-devel mailing list >>[email protected] >>http://www.mostang.com/mailman/listinfo/sane-devel >> >> > > > -- Sergey Smirnov
