[sane-devel] Plustek scanner - follow up

[Immanuel CRC Office]

m. allan noah wrote:
> 
> the permissions of the device file /dev/parport0 need to be changed.
> 
> in the old days, we would use chmod or chown. if you are still using 
> kernel 2.4, this might work for you.
> 
> more modern systems do not have static device files on the hard drive, 
> the files are created at each boot. so if you make perms changes, they 
> will be lost at each reboot. there are a myriad of solutions to this, 
> including hotplug/coldplug, udev, devfs, and resmgr. which one of those 
> you need depends on which linux you are using, and how recently it has 
> been updated :(
> 
> fortunately, it seems that most distros have settled on udev, so things 
> should hopefully settle down (tongue firmly in cheek)
> 
> allan
> 

I'm using Ubuntu 6.06, fully updated. I'll try to find a howto on udev.

I tried a mini-howto 
(http://www.linuxprinting.org/download/digitalimage/Scanning-as-Normal-User-on-Wierd-Scanner-Mini-HOWTO.txt) 
but that was only for /dev/parport0 so that won't work, I guess.

Crystle

> On Fri, 4 Aug 2006, Immanuel CRC Office wrote:
> 
>> Immanuel CRC Office wrote:
>>> Gerhard Jaeger wrote:
>>>> On Thursday 03 August 2006 16:51, Immanuel CRC Office wrote:
>>>>> Okay, so I'm getting somewhere.
>>>>>
>>>>> Plustek OpticPro 9639P+, parallel port
>>>>> using plustek_pp backend.
>>>>>
>>>>> I have to run all as root so far.
>>>>>
>>>>> scanimage -L gives:
>>>>> device `plustek_pp:parport0' is a Plustek 9636P+/Turbo parallel 
>>>>> port flatbed scanner
>>>>> device `hpaio:/par/HP_LaserJet_1200?device=/dev/parport0' is a hp 
>>>>> HP_LaserJet_1200 multi-function peripheral
>>>>>
>>>>> (Great! I have two connected in series to my parallel port. Printer 
>>>>> still works. Ideally, I want both connected and both working, so 
>>>>> we're getting somewhere.)
>>>>>
>>>>> When I do:
>>>>> scanimage -d plustek_pp:parport0 -p > image.pnm
>>>>>
>>>>> I heard a bit of sounds from the scanner. Then I got:
>>>>> scanimage: sane_read: Error during device I/O
>>>>>
>>>>>
>>>>> 1. Still can only do stuff as root.
>>>>> 2. Need to fix error.
>>>>>
>>>>> Ideas?
>>>>
>>>> Hi,
>>>>
>>>> I didn't follow the thread so far, so some hints might be doubled:
>>>>
>>>> - remove the printer from the chain as this might cause problems
>>>>   (has also be stated by Plustek)
>>>> - make sure to have any ECP mode disabled in BIOS (set the port to
>>>>   SPP, BiDi or EPP)
>>>> - for having access to the parallel port as "normal" user you have to
>>>>   tweak probably the udev/hotplug settings depending on the 
>>>> distribution
>>>>   you use
>>>>
>>>> HTH
>>>> Gerhard
>>>>
>>>>
>>> I switched it to EPP, removed the printer, and voila! I have a scan.
>>>
>>> However, I only got a small scan (not full size of page), and the 
>>> background is red. I'm trying to scan text to do OCR.
>>>
>>> I tried a full page of text and the background isn't red, but the 
>>> text is not high enough resolution at all.
>>>
>>> I'll look into getting the it work with Xsane (have to get user to 
>>> access scanner yet).
>>>
>>> Any tips?
>>>
>>> Crystle
>>>
>>
>> So I ran xsane as root (lots of warnings) and did a higher resolution 
>> scan and did OCR, and it's decent!
>>
>> So, I just need to get the scanner allowed by sane for normal users 
>> and I'm off to the races.
>>
>> I also have to try to have it work with my printer plugged in, but 
>> that's not insurmountable.
>>
>> Thanks everyone for help. I may ask again if I can't get the scanner 
>> to work outside of root.
>>
>> Crystle
>>
>>
> 

-- 
Crystle Numan
Administrative Secretary, Immanuel CRC
61 Mohawk Rd. W. Hamilton ON   L9C 1V9
905-385-0662
office at immanuelministries.ca
http://immanuelministries.ca