Now, within the two days which me original posting needed to arrive on the SANE list, there is more information. See
http://qa.mandrakesoft.com/show_bug.cgi?id=4987 Especially also a user with a Mustek ScanExpress 1200 ("gt68xx" driver) observed this problem. It seems that the "hp4200" backend recognizes every scanner on USB as an HP ScanJet 4200. Till Till Kamppeter wrote: > This is a bug reported by someone with an Epson Perfection 1650 who > tested the release candidate 1 of the new Mandrake 9.2: > > https://qa.mandrakesoft.com/show_bug.cgi?id=4987 > > For Mandrake 9.2 I have packaged SANE 1.0.12 with "hp4200" version 0.4. > I can also reproduce the bug with my Epson Perfection 1260 Photo and the > same software versions. > > I have a system with an HP PSC 950 and an Epson Perfection 1260 Photo > and I get the following: > > --------------------------------------------------------------------------- > [root@majax g]# sane-find-scanner | grep -v \# > > found USB scanner (vendor=0x04b8, product=0x011d) at /dev/usb/scanner0 > found USB scanner (vendor=0x04b8 [EPSON], product=0x011d [EPSON > Scanner]) at libusb:001:115 > > [root@majax g]# scanimage -L > device `hpoj:mlc:usb:PSC_900_Series' is a Hewlett-Packard PSC 900 Series > multi-function peripheral > device `plustek:/dev/usb/scanner0' is a Epson Perfection 1260/Photo USB > flatbed scanner > device `hp4200:/dev/usb/scanner0' is a Hewlett-Packard HP-4200 flatbed > scanner > > [root@majax g]# > --------------------------------------------------------------------------- > > and /proc/bus/usb/devices has the following entries > > --------------------------------------------------------------------------- > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 > B: Alloc= 22/900 us ( 2%), #Int= 2, #Iso= 0 > D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0000 ProdID=0000 Rev= 0.00 > S: Product=USB UHCI Root Hub > S: SerialNumber=1000 > C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms > T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 7 > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0451 ProdID=2077 Rev= 1.00 > S: Product=General Purpose USB Hub > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms > T: Bus=01 Lev=02 Prnt=02 Port=04 Cnt=01 Dev#=115 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=ff(vend.) Sub=00 Prot=ff MxPS= 8 #Cfgs= 1 > P: Vendor=04b8 ProdID=011d Rev= 1.00 > S: Manufacturer=EPSON > S: Product=EPSON Scanner > C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA > I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=ff Driver=usbscanner > E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=16ms > E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > T: Bus=01 Lev=02 Prnt=02 Port=05 Cnt=02 Dev#= 3 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=03f0 ProdID=1e11 Rev= 1.00 > S: Manufacturer=Hewlett-Packard > S: Product=PSC 950xi > S: SerialNumber=MY21AC21J6WP > C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA > I: If#= 0 Alt= 0 #EPs= 3 Cls=07(print) Sub=01 Prot=03 Driver=usblp > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=82(I) Atr=03(Int.) MxPS= 8 Ivl=10ms > I: If#= 0 Alt= 1 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > I: If#= 0 Alt= 2 #EPs= 1 Cls=07(print) Sub=01 Prot=01 Driver=usblp > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > --------------------------------------------------------------------------- > > So my Epson Perfection 1260 Photo is detected both as Epson and as HP > (/dev/usb/scanner0). > > If I unload the scanner.o kernel module with > > rmmod scanner.o > > my scanners are correctly detected (The HP 4200 disappears, the other > two stay). So the problem only happens with access to the scanners via > the kernel module but not with user-mode USB access via libusb. > > This seems for me to be a bug in the "hp4200" backend that it recognizes > also scanners which use other drivers (and will not necessarily work > with "hp4200"). > > Or is it safe to not use scanner.o any more at all, for example shipping > Mandrake Linux with a kernel without this module or at least adding a > line to /etc/modules.conf to suppress automatic loading of the module? > Are there really scanners/backends which need scanner.o? > > What is the advantage of scanner.o vs. libusb? > > Till > > _______________________________________________ > Sane-devel mailing list > [email protected] > http://www.mostang.com/mailman/listinfo/sane-devel > >
