uscanner + HPS' usb stack + nvidia-driver

[Andrew Muhametshin]

Hi,

I've problems with scanning in -STABLE using HPS' USB stack and running 
X with x11/nvidia-driver - scanning process either hangs or there are 
extraneous strips on resulting image 
(http://www.dobrohot.org/files/scanner-error-001.jpg, for example), 
while everything is ok when scanning from syscons or in X with 
xf86-video-nv driver.
I've tested it in -CURRENT with x11/nvidia-driver and official USB stack 
- problem can't be reproduced, but scanning speed is much lower than 
with HPS' USB stack.

Is there any hope that it will be solved in the near future?

=====
$ scanimage -L
device `epson:/dev/uscanner0' is a Epson GT-9300 flatbed scanner

egrep "^usb|uscanner" /var/run/dmesg.boot
usb0: <OHCI (generic) USB controller> on ohci0
usb1: EHCI version 1.0
usb1: <EHCI (generic) USB 2.0 controller> on ehci0
usb0: 12MBps Full Speed USB v1.0
usb1: 480MBps High Speed USB v2.0
uscanner0: <EPSON EPSON Scanner, class 255/255, rev 2.00/1.00, addr 126>

usbdevs -v
Controller /dev/usb0:
addr 127: full speed, self powered, config 1, OHCI root hub(0x0000), 
nVidia(0x0000), rev 1.00
  port 1 powered
  port 2 powered
  port 3 powered
  port 4 powered
  port 5 powered
  port 6 powered
  port 7 powered
  port 8 powered
Controller /dev/usb1:
addr 126: high speed, self powered, config 1, EPSON Scanner(0x011b), 
EPSON(0x04b8), rev 1.00
addr 127: high speed, self powered, config 1, EHCI root hub(0x0000), 
nVidia(0x0000), rev 1.00
  port 1 powered
  port 2 powered
  port 3 powered
  port 4 addr 126: high speed, self powered, config 1, EPSON 
Scanner(0x011b), EPSON(0x04b8), rev 1.00
  port 5 powered
  port 6 powered
  port 7 powered
  port 8 powered

# vmstat -i
interrupt                          total       rate
irq1: atkbd0                        7634          0
irq5: nvidia0+++                 2026534        116
irq7: pcm0                        870058         50
irq10: ehci0                          50          0
irq11: nfe0                      1576908         90
irq12: psm0                      1477304         85
irq14: ata0                        27196          1
irq15: ata1                           53          0
cpu0: timer                     34714327       1999
Total                           40700064       2344

# pciconf -lv| more
ohci0 at pci0:11:0:        class=0x0c0310 card=0x81c01043 chip=0x026d10de 
rev=0xa3 hdr=0x00
     vendor     = 'NVIDIA Corporation'
     class      = serial bus
     subclass   = USB
ehci0 at pci0:11:1:        class=0x0c0320 card=0x81c01043 chip=0x026e10de 
rev=0xa3 hdr=0x00
     vendor     = 'NVIDIA Corporation'
     class      = serial bus
     subclass   = USB

# uname -a
FreeBSD host01 6.2-STABLE FreeBSD 6.2-STABLE #0: Sun Jul 22 17:27:18 MSD 
2007     root at host01:/usr/obj/usr/src/sys/HOST01  i386