Scanner difficulty and a work around

[John Bowling]

I have a Canon Lide 30 scanner (USB connection) that has worked well for
years with all versions of openSUSE. It continues to do so provided I
boot up with it fully connected.

If my machine is running and I attach it, then use Yast in a GUI to
connect it up, it will quit responding to the USB mouse. The only thing
I can do to recover is a hard reboot by switching power off, a rather
drastic fix and then it works well. I have not tried it with Yast in CLI.

This is with 12.1 and Kde3.

John

[Malcolm]

Hi
I would check for your device numbers in the *sane*
files in /etc/udev/rules.d sounds like a conflict for the usb device.
Running udevadm monitor and/or lsusb -vv from the command line should
help identify.

Have you tried unplugging the mouse and re-plugging?


--
Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop
up 21:13, 3 users, load average: 0.03, 0.04, 0.05
CPU Intel i5 CPU M5...@2.40GHz | Intel Arrandale GPU

[Darklight]

Malcolm wrote:

> On Sat, 26 May 2012 07:19:01 -0700
> John Bowling <johnl...@cox.net> wrote:
>
>> I have a Canon Lide 30 scanner (USB connection) that has worked well
>> for years with all versions of openSUSE. It continues to do so
>> provided I boot up with it fully connected.
>>
>> If my machine is running and I attach it, then use Yast in a GUI to
>> connect it up, it will quit responding to the USB mouse. The only
>> thing I can do to recover is a hard reboot by switching power off, a
>> rather drastic fix and then it works well. I have not tried it with
>> Yast in CLI.
>>
>> This is with 12.1 and Kde3.
>>
>> John
> Hi
> I would check for your device numbers in the *sane*
> files in /etc/udev/rules.d sounds like a conflict for the usb device.
> Running udevadm monitor and/or lsusb -vv from the command line should
> help identify.
>
> Have you tried unplugging the mouse and re-plugging?
>
>

whats wrong with keeping it connected?

[Malcolm]

Hi
To see if it grabs another usb device number on hotplug.

--
Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop

up 1 day 23:26, 3 users, load average: 0.04, 0.04, 0.05

[John Bowling]

I've tried unplugging and replugging the mouse. It's doesn't help.

When this occurs, the Yast window has focus. I can't close it, nor can I
switch focus to the CLI terminal window. Also, Yast used to have a way
of looking at system messages which no longer exists. Rather hard to
find out anything when you can't get to it. It will let me log out,
without returning the mouse action, and shut down. Rebooting fixes the
problem, provides proper scanner access, but does not retain any of the
information that would.
I checked /var/log/messages after reboot and found all references to
CanoScan are on usb 3-1 and all references to mouse are on usb 4-1. If
they were on the same one, it's not recorded. Also, I suspect that the
numbers relate to the tree structure of the USB hardware setup, and that
has not changed.

John

[Darklight]

why don't you leave it plugged in?

[John Bowling]

I discovered a problem with the scanner. What I had to do to find this
out is to install the drivers from Canon on an XP machine and try a scan
there. It told me the slide on the bottom, presumably a lock for
shipping purposes, was in the wrong position.

I moved the switch over and then tried it on 12.1. No problems!
I no longer have a manual for this scanner.

If I recall, there is also a switch on the front of the scanner to
trigger a scan start that the Linux driver ignores.

With Canon remaining ignorant, and not providing any drivers for Linux,
I will never buy any Canon product (this scanner is several years old).
I'm planning on an all-in-one for some of the other features, either HP
or Epson.

John