[sane-devel] Brightness varies from left to right

[Kenneth Kurkio]

Here is some information about this question. If you need more please
advice. I can put longer logs at website.

# uname -a
Linux ID-118939.user.uni-berlin.de 2.2.17-14 #1 Mon Feb 5 18:20:11 EST
2001 i586 unknown

# cat /proc/bus/usb/devices
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #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=d400
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= 0
D:  Ver= 1.10 Cls=ff(vend.) Sub=00 Prot=ff MxPS= 8 #Cfgs=  1
P:  Vendor=04a9 ProdID=220d Rev= 1.00
S:  Manufacturer=Canon
S:  Product=CanoScan
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=ff Driver=(none)
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

# scanimage -L
device `plustek:libusb:001:002' is a Canon N670U/N676U/LiDE20 USB flatbed
scanner

# scanimage --version
scanimage (sane-backends) 1.0.15; backend version 1.0.15

On Sun, 20 Feb 2005, Kenneth Kurkio wrote:

> Please see this test scan:
>
> http://kotisivu.mtv3.fi/kkur/fiat.jpg
>
> I have used Canon Lide 20 scanner. Left side of the scan is noticeably
> brighter than right side. The Fiat logo at the middle should be completely
> visible.
>
> I have compiled Sane from source. What is wrong with my system?
>
>