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On Mon, Mar 3, 2014 at 1:51 PM, Frank Peters <frank.peters@×××××××.net> wrote: |
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> On Mon, 3 Mar 2014 11:20:50 -0800 |
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> Mark Knecht <markknecht@×××××.com> wrote: |
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> |
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>> |
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>> While I understand your point these two comments contradict each |
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>> other, or more accurately, the first was inaccurate in the sense that |
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>> someone needed to create your /dev entry, either udev or you, it |
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>> didn't matter. Once it was there your scanner worked, correct? |
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>> |
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> |
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> With USB devices things are a bit different. If I plug in a USB |
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> gadget, the kernel will report a certain device. If I then unplug |
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> it and then immediately replug it, the kernel will report a different |
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> device even though it is the same USB gadget. For this reason, udev |
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> can alleviate the uncertainty by automagically constructing the |
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> correct device node. |
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> |
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OK, fair enough. However from the outside udev doesn't look like |
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magic, at least the way I used it as it's mostly about my modifying |
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some file to say 'this USB ID is this dev, this MAC address is this |
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network', and so on and so on. |
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While I'm arguably the least experienced person on this list I'm sure |
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someone with your skills could figure out your own scripts to do that |
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sort of thing, should you choose to. |
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> However, until recently, USB scanners were accessed through a kernel |
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> module and this allowed a static node to be created in the /dev tree. |
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> Using the kernel module access, SANE could always find the scanner. |
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> For some reason, the scanner module has been eliminated from the |
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> kernel and now udev is unconditionally necessary for scanner access |
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> (unless the user employs an awkward workaround). |
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> |
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> This represents the future trend. Udev will be an absolute, total |
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> requirement for everything. |
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> |
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> Admittedly, my views are in the (exteme?) minority. So it's goodbye |
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> simplicity and hello complicated junk. |
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> |
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> I used to have a lot of fun building and tweaking my Linux system, |
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> but that experience is fading fast. |
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> |
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> Frank Peters |
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> |
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> |
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Well Frank, you and I have been around here long enough to remember |
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each other and get old enough to start forgetting how long we've been |
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around here. Like you it used to be more fun. Probably like you I used |
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to be a lot younger too! :-) |
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Cheers, |
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Mark |
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