Re: Scanner rights messed up: please help!
On Thu, Aug 24, 2006 at 12:06:03 +0100, Wackojacko wrote:
> Christof Hurschler wrote:
> >>On Thursday 24 August 2006 19:10, Christof Hurschler shared this with us
> >>all:
> >>>--> No one responded to my last post, so I'll try it again. A previously
> >>>working scanner is no longer accessible for the group "scanner". It
> >>works
> >>>under root. Something seems to have changed in a recent dist-upgrade.
> >>-->
> >>>--> The device is listed as:
> >>>-->
> >>>--> T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
> >>>--> D: Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs= 1
> >>>--> P: Vendor=04b8 ProdID=0109 Rev= 1.07
> >>>--> S: Manufacturer=EPSON
> >>>--> S: Product=Expression1640XL
> >>>--> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 2mA
> >>>--> I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
> >>>--> E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> >>>--> E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> >>>-->
> >>>--> but ls -la /proc/bus/usb/001
> >>>--> total 0
> >>>--> dr-xr-xr-x 2 root root 0 2006-08-24 11:35 .
> >>>--> drwxr-xr-x 6 root root 0 2006-08-24 11:35 ..
> >>>--> -rw-r--r-- 1 root root 43 2006-08-24 11:35 001
> >>>--> -rw-r--r-- 1 root root 50 2006-08-24 09:36 002
> >>>-->
> >>>--> where 001:002 used to be root:scanner, allowing scanning by users in
> >>>that group. Not any more. -->
> >>>--> I don't know where the rights for this device are beging set, can
> >>>someone suggest a way to solve this problem? I did find someting about
> >>>setting rights in the documentation for usblib, but have never had to
> >>>intervene in this regard before. And am not sure if that is the problem
> >>>anyway.
[...]
> I use sid and AKAICT udev deals with permissions for devices. Try
> /etc/udev/permission.rules.
The udev rules for the scanners are in /etc/udev/libsane.rules which
comes from package "libsane". It seems that the rule for product id 0109
is missing:
...
# Epson Expression 1600
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="0107", MODE="664", GROUP="scanner"
# Epson Perfection 1640
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="010a", MODE="664", GROUP="scanner"
...
(This is copied from an up-to-date Sid system, libsane 1.0.18-3)
You can try to insert the following between the 0107 and the 010a rule:
# Epson Expression 1640XL
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="0109", MODE="664", GROUP="scanner"
That should set the group to "scanner" if you unplug the device and plug
it in again. (I am not sure if you also have to restart udev.)
If this works you should mail the rule to the sane-devel mailing list;
see the comments at the beginning of /etc/udev/libsane.rules for
details. (I do not have this scanner therefore I cannot check this.)
--
Regards,
Florian
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