Hello, I have some questions again on HP2400 current development. How you people are checking code? i mean i have also same code but neither scanimage -L is recognising nor Xsane detects it. then how can i check whatever features are implemented are correct or wrong? only sane-find-scanner command is working fine but not xsane. How can i calso check head movement? regards, Parag.
On 12/2/05, Gerald Murray <gmur...@cloudnet.com> wrote: > > Hello all, > > Scanner: hp scanjet 2400 > using sane-backends-cvs20051124 > > Expected completion date: unknown, it is ready when it is ready > > Update from previous post: > key: - previously reported; + update : > > - Head moves two times the expected distance. > - Excessive time in genesys_warmup_lamp() > + excessive time appears to be a result of an incorrect formula. > (the source was patched to force SANE_STATUS_GOOD, thereby ignoring > the frontend setup, and attempting to be sure that head movements were > OK. I am to look into the frontend setup later) > - There was no image in the STDOUT output (file size 1523712) > - Status register for lamp reports OFF, but lamp remains ON. > - Head remains where the scan stopped. > + This is a FEATURE, not a bug. The scan process depends on every detail > being expected and correct. When a status other than SANE_STATUS_GOOD > is encountered, all processing stops whereever it was. This is good, > because it assures that there can be no damage to the scanner as a > result of an unexpected reply from the device. The cause of the > problem was a result SANE_IO_ERROR, reported at the end > of the scan (miscalculation of bytes expected/received) > - In lineart mode, depth:1 was what I expected. depth:8 was reported. > > NEW: > + The device responds inconsistently to the same scan request. > When the same request is executed sequentially many times, on the > odd-numbered attempts, the scan completes, and goes to end of task. > On even-numbered attempts, the scan head never moves off of the home > position. (reading bulk data: Error during device I/O) > The error comes from not properly setting up the frontend during > the lamp warmup. > NOTE: to duplicate this problem, install from cvs referenced above. > The source code is patched (see below) to force SANE_STATUS_GOOD > in function genesys_warmup_lamp(). > Use scanimage from SOURCE_TOP_DIR/frontend/scanimage. > Execute the bash command as shown below, substituting your > {BUS}/{DEVNUM} as shown in /proc/bus/usb/devices file for your scanner. > REMEMBER to keep the image size small until the size of the image > is corrected. > > #!/bin/sh > scanimage -d genesys:libusb:{BUS}:{DEVNUM} --resolution 150 --mode color > -t 1 -l > 80 -x100 -y 30 2>scan.log 1>image.pnm > #end > PATCH (DO NOT APPLY) This patch was how SANE_STATUS_GOOD was forced > from genesys_warmup_lamp(). The frontend is not setup right, so > the image is not correct, but it demonstrates motor handling of > the scan head and the inconsistent response from the device. > > --- sane-backend-20051124/backend/genesys.c 2005-12-02 00:25: > 55.000000000 > -0600 > +++ sane-backend-hack/backend/genesys.c 2005-12-02 00:24:45.000000000-0600 > @@ -3419,6 +3419,12 @@ > DBG (DBG_error, > "genesys_warmup_lamp: warmup timed out after %d seconds. Lamp > defective?\n", > seconds); > + if (seconds > 40) { /* FIXME GPM: remove 6 lines here */ > + DBG(DBG_info, > + "genesys_warmup_lamp: ** ENOUGH (FIXME) **\n"); > + status = SANE_STATUS_GOOD; > + goto FIXME_hack_trick; > + } > status = SANE_STATUS_IO_ERROR; > } > else > @@ -3427,6 +3433,7 @@ > "genesys_warmup_lamp: warmup succeeded after %d seconds\n", > seconds); > } > +FIXME_hack_trick: /* FIXME remove this GPM */ > free (first_line); > free (second_line); > return status; > ---- end-of-patch > > best regards, > Gerald > > > -- > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20051206/54a39ad7/attachment.html From stef...@modulonet.fr Tue Dec 6 07:05:53 2005 From: stef...@modulonet.fr (=?iso-8859-15?q?St=E9phane_VOLTZ?=) Date: Tue Dec 6 07:02:00 2005 Subject: [sane-devel] GL646 part and 1.0.17 upcoming release Message-ID: <200512060805.53626.stef...@modulonet.fr> Hello, I finally fixed the last two known bugs in the genesy backend related to GL646 scanners. The experimental version is now ready for the next release for this part. Regards, Stef