plustek: Thread: negative/slide backlight does not work Plustek OpticPro PT12

I have Plustek OpticPro PT12 scanner. It works reasonably well (1) in the 
normal mode using Debian sarge, sane-1.0.7 (not modified) and 
plustek-module-0_41_5 with 2.4.19 kernel.

But when I switch to transparency or negative mode both lights turn dark. Is 
there any trick to switch ON this backlight. I have not changed any settings 
in module options (

alias char-major-40     pt_drv
pre-install pt_drv modprobe -k parport
options pt_drv lampoff=180 warmup=15 port=0x378 lOffonEnd=1 mov=0 slowIO=0 \ 
  forceMode=0

and also use all defaults in /etc/sane.d/plustek.conf

The results are the same with plustek-module-0_42 _9 and sane-1.0.9
I am using xsane and xscanimage when testing.

Best regards,
--
Tomasz Motylewski

(1) when the scanner starts the system is very slow - pt_drv blocks most of 
the CPU time.
(2) when I use 2.4.17 kernel EPP mode is detected OK by parport_pc, but with 
2.4.19 I get only PCSPP in /proc/sys/dev/parport/parport0/modes
(Host bridge:[ALi] M1541, PCI bridge: [ALi] M1541, ISA bridge: [ALi] M1533 
PCI to ISA Bridge [Aladdin IV])

(3) I have seen some OOPS messages with plustek-module-0_41_5  (when using 
transparency/negative mode). Should I investigate it further and report?

 cat /proc/pt_drv/device0/info
Model       : PT12
Portaddress : 0x378
Portmode    : SPP (fast I/O, autodetect)
Buttons     : 0
Warmuptime  : 15s
Lamp timeout: 180s
mov-switch  : 0
I/O-delay   : 1
CCD-Type    : 3799
TPA         : yes

 cat /proc/pt_drv/info
Plustek Flatbed Scanner Driver version 0.42-10
Devices      : 1
IOCTL-Version: 0x00000103

Hi,

here (Kernel 2.4.19 with IEEE1248 support), module-0_42_9
and SANE 1.0.9 there are no problems so far...

The IEEE stuff should only be disabled if there are any
problems...

Gerhard

On Saturday, 4. January 2003 13:00, Motyle wrote:
> I have Plustek OpticPro PT12 scanner. It works reasonably well (1) in the
> normal mode using Debian sarge, sane-1.0.7 (not modified) and
> plustek-module-0_41_5 with 2.4.19 kernel.
>
> But when I switch to transparency or negative mode both lights turn dark.
> Is there any trick to switch ON this backlight. I have not changed any
> settings in module options (
>
> alias char-major-40     pt_drv
> pre-install pt_drv modprobe -k parport
> options pt_drv lampoff=180 warmup=15 port=0x378 lOffonEnd=1 mov=0 slowIO=0
> \ forceMode=0
>
> and also use all defaults in /etc/sane.d/plustek.conf
>
> The results are the same with plustek-module-0_42 _9 and sane-1.0.9
> I am using xsane and xscanimage when testing.
>
> Best regards,