[sane-devel] Epson Perfection 1650
Sergey Smirnov
svs@leaves.ru
Thu, 14 Feb 2002 16:49:43 +0300
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 <svs@leaves.ru> 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 <svs@leaves.ru> 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
>>>>>>>>Sane-devel@www.mostang.com
>>>>>>>>http://www.mostang.com/mailman/listinfo/sane-devel
>>>>>>>>
>>>>>>>>
>>>>>>--
>>>>>>Sergey Smirnov
>>>>>>
>>>>>>
>>>_______________________________________________
>>>Sane-devel mailing list
>>>Sane-devel@www.mostang.com
>>>http://www.mostang.com/mailman/listinfo/sane-devel
>>>
>>>
>>--
>>Sergey Smirnov
>>
>>_______________________________________________
>>Sane-devel mailing list
>>Sane-devel@www.mostang.com
>>http://www.mostang.com/mailman/listinfo/sane-devel
>>
>>
>
>
>
--
Sergey Smirnov