Xsane has no networking code in it. Everything you have described so far sounds like a problem in the brother4 backend. I suggest you try the same test using scanimage at the command line, and if it is still slow, compare to the windows driver. If you see a difference, ask Brother about brother4.
allan On Thu, May 5, 2016 at 2:05 PM, Gene Heskett <ghesk...@shentel.net> wrote: > On Thursday 05 May 2016 10:31:53 Richard Ryniker wrote: > >> I doubt a gigabit Ethernet connection will make any significant >> difference. > > After investigating the lcd panels network settings for a wired lan, and > finding the best it can do is 100mbit-fd, that switch isn't going to do > a lot of good. But the old one had a port that comes and goes very > intermittently, so I expect its been tapped by a local lightnings EMP > somewhere along the 6+ years its been in use here. > > I as I said before, can ping it in an average time of .3 milliseconds. > But when xsane inits on the lan address, on launch from a shell, the > little "looking for scanners" box is drawn for about 1 screen refresh > and its wiped. Then the is a 5 or 6 second pause before xsane draws its > windows. Hooked up with a usb cable, the opening screen draws are a > small fraction of a second being drawn. And this is perceptually the > exact same lag as the command delay is. So while its working, I'm of the > opinion that the command lag is in xsane someplace. > > Since 99.9% of the scanners sane runs are hooked up to a USB cable, this > lag may be a bug someplace that because its so rare, has not been well > investigated. The wheel only squeaks on the 29th day of February sort > of thing. ;-) > > According to an xsane -v: > gene@coyote:/etc$ xsane -v > xsane-0.998 (c) 1998-2010 Oliver Rauch > E-mail: oliver.ra...@xsane.org > package xsane-0.996 > compiled with GTK-2.24.10 > with color management function > with GIMP support, compiled with GIMP-2.6.12 > XSane output formats: jpeg, pdf(compr.), png, pnm, ps(compr.), tiff, > txt > > From that it looks like its been a while since xsane has had any great > amount of TLC. Its also odd that the "about screen" says 0.998, not > 0.996. ??? > > Perhaps its time to troll thru the networking code & see if anything > bites? So I'll renew my offer to serve as a test mule again. > > But please don't cut too deep, I am on 7.5 mg of warfarin a day for blood > thinner. :) One of those defective takata air bags could kill me long > before the sirens could be heard in the distance. :( > > >> Data rate from your scanner is dependent on the >> mechanical speed of the sensor and scan resolution. If you scan a >> page 8.5 by 11 inches at 600 pixels per inch resolution with 24 bits >> per pixel, there is about 100 megabytes of data. With a 100-megabit >> Ethernet connection, that is about 10 seconds transmission time. If >> your scanner requires 10 seconds for mechanical movement at that >> resolution, the Ethernet connection should not limit scan speed. >> >> At 1200 pixel per inch resolution, there would be four times as much >> data (400 Mbytes.) This would need roughly 40 seconds to transfer >> using a 100-megabit Ethernet connection, but your scanner likely moves >> more slowly at that resolution. If you can scan faster than 40 >> seconds with a USB connection at that resolution, then gigabit >> Ethernet might help. Do you have any reason to believe your machine >> even supports gigabit Ethernet? Most do not. >> >> Eight seconds instead of two seconds to start a scan sounds like some >> sort of time-out situation. The tcpdump command could provide some >> details about timing of the Ethernet traffic, though interpretation of >> the data might be a challenge. > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > -- > sane-devel mailing list: sane-devel@lists.alioth.debian.org > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to sane-devel-requ...@lists.alioth.debian.org -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to sane-devel-requ...@lists.alioth.debian.org