[sane-devel] S..L..O..W USB Scanning with Epson 1650

[Justin S. Peavey]

It is taking about 10 times longer to scan (even in preview mode) in
Linux than it does in W2K.  I've tried the 2.4.8 and 2.4.13 kernels,
Sane 1.0.5 and 1.0.6, and a couple of frontends (xsane, iscan - from
Epson) with no difference.  Is this normal?

Stats:

Dual PIII (667), Tyan Tiger 133 Mobo (Apollo Pro 133A)
Only USB device is this scanner: Epson 1650 (vendor=0x04b8
product=0x0110) 

# lspci -v:

00:00.0 Host bridge: VIA Technologies, Inc. VT82C691 [Apollo PRO] (rev
c4)
        Flags: bus master, medium devsel, latency 0
        Memory at d8000000 (32-bit, prefetchable) [size=64M]
        Capabilities: [a0] AGP version 2.0
        Capabilities: [c0] Power Management version 2

00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598 [Apollo MVP3 AGP]
(prog-if 00 [Normal decode])
        Flags: bus master, 66Mhz, medium devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        Memory behind bridge: dc000000-ddffffff
        Prefetchable memory behind bridge: d0000000-d7ffffff
        Capabilities: [80] Power Management version 2

00:07.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Apollo PRO]
(rev 23)
        Subsystem: VIA Technologies, Inc. VT82C596/A/B PCI to ISA
        Bridge
        Flags: bus master, stepping, medium devsel, latency 0

00:07.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo]
(rev 10) (prog-if 8a [Master SecP PriP])
        Flags: bus master, medium devsel, latency 32
        I/O ports at d000 [size=16]
        Capabilities: [c0] Power Management version 2

00:07.2 USB Controller: VIA Technologies, Inc. VT82C586B USB (rev 11)
(prog-if 00 [UHCI])
        Subsystem: Unknown device 0925:1234
        Flags: bus master, medium devsel, latency 32, IRQ 11
        I/O ports at d400 [size=32]
        Capabilities: [80] Power Management version 2

00:07.3 Host bridge: VIA Technologies, Inc.: Unknown device 3050 (rev
30)
        Flags: medium devsel

00:0f.0 Ethernet controller: National Semiconductor Corporation:
Unknown device 0020
        Subsystem: Netgear: Unknown device f312
        Flags: bus master, medium devsel, latency 32, IRQ 11
        I/O ports at d800 [size=256]
        Memory at df000000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <unassigned> [disabled] [size=64K]
        Capabilities: [40] Power Management version 2

00:10.0 Multimedia audio controller: Creative Labs SB Live! EMU10000
(rev 05)
        Subsystem: Creative Labs CT4760 SBLive!
        Flags: bus master, medium devsel, latency 32, IRQ 10
        I/O ports at dc00 [size=32]
        Capabilities: [dc] Power Management version 1

00:10.1 Input device controller: Creative Labs SB Live! (rev 05)
        Subsystem: Creative Labs Gameport Joystick
        Flags: bus master, medium devsel, latency 32
        I/O ports at e000 [size=8]
        Capabilities: [dc] Power Management version 1

00:12.0 Multimedia video controller: Brooktree Corporation Bt878 (rev
02)
        Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
        Flags: bus master, medium devsel, latency 32, IRQ 5
        Memory at df001000 (32-bit, prefetchable) [size=4K]

00:12.1 Multimedia controller: Brooktree Corporation Bt878 (rev 02)
        Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
        Flags: bus master, medium devsel, latency 32, IRQ 5
        Memory at df002000 (32-bit, prefetchable) [size=4K]

00:13.0 SCSI storage controller: Advanced System Products, Inc
ABP940-UW
        Flags: bus master, medium devsel, latency 32, IRQ 11
        I/O ports at e400 [size=64]
        Memory at df003000 (32-bit, non-prefetchable) [size=256]
        Expansion ROM at <unassigned> [disabled] [size=64K]

01:00.0 VGA compatible controller: nVidia Corporation NV15 (Geforce2
GTS) (rev a4) (prog-if 00 [VGA])
        Subsystem: LeadTek Research Inc.: Unknown device 2840
        Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 10
        Memory at dc000000 (32-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (32-bit, prefetchable) [size=128M]
        Expansion ROM at <unassigned> [disabled] [size=64K]
        Capabilities: [60] Power Management version 1
        Capabilities: [44] AGP version 2.0