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jhon987
Apprentice
Joined: 18 Nov 2013
Posts: 284
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 Posted: Tue Oct 25, 2016 7:34 pm Post subject: |
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Guys, focus, focus.
The question is how to get USB attached printer to work via the kernel?
Fitzcarraldo, you're right the Wiki is not the gospel truth, it doesn't matter, as long as there's a way to make it work through the kernel (regardless of the wiki) I want to know how.
Someone has to know how it's done, otherwise, there's no reason of having that setting in the kernel at all, wouldn't y'all agree? |
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grumblebear
Apprentice
Joined: 26 Feb 2008
Posts: 189
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| Posted: Tue Oct 25, 2016 8:17 pm Post subject: |
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| Read my previous message again. The usblp module is just an old driver for some legacy software. It is nothing you should have to deal with in a modern environment. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 47088
Location: 56N 3W
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| Posted: Tue Oct 25, 2016 8:34 pm Post subject: |
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jhon987,
Some history will be useful here.
Kernel support for usb printing was moved to user space libusb years ago.
At one time apps supported an either/or ... the two approaches do the same thing.
Apps are moving (have moved) to libusb, so may no longer work with kernel usb printing.
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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ian.au
Guru
Joined: 07 Apr 2011
Posts: 515
Location: Australia
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| Posted: Tue Oct 25, 2016 9:18 pm Post subject: Re: Locally attached printer (USB) activated in the kernel?? |
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| Perfect Gentleman wrote: | | ian.au wrote: | So has that module ever been called?
If the module ends up loaded I'm guessing CUPS +usb will auger. |
| Code: | ~ $ grep -i printer /boot/config-4.8.4-gentoo
CONFIG_USB_PRINTER=m
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~ $ lsmod | grep -i usblp
usblp 10473 -2
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[ebuild R ] net-print/cups-2.1.4::gentoo USE="X acl dbus pam ssl threads usb -debug -java -kerberos -lprng-compat -python (-selinux) -static-libs -systemd -xinetd -zeroconf" ABI_X86="(64) -32 (-x32)" LINGUAS="ru -ca -cs -de -es -fr -it -ja" PYTHON_TARGETS="python2_7" 0 KiB |
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All that lsmod really tells you there is that CONFIG_MODULE_UNLOAD=n. From memory lsmod always returns -2 in such cases as there's no need to count the number of load/unloads. Having that set to n used to be a bit of a gotcha too. |
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Fitzcarraldo
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Joined: 30 Aug 2008
Posts: 1877
Location: United Kingdom
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| Posted: Wed Oct 26, 2016 2:26 am Post subject: |
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Someone with a Wiki account needs to fix that Wiki article so other users who are unaware of the history use the preferred CUPS USB backend libusb, unless they are sure their particular legacy printer specifically requires usblp.
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Fitzcarraldo's blog |
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jhon987
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Joined: 18 Nov 2013
Posts: 284
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| Posted: Wed Oct 26, 2016 5:24 am Post subject: |
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I see,
grumblebear, NeddySeagoon, thanks for your input.
Too bad I had wasted half my day trying to make it print using the kernel driver...
I agree with Fitzcarraldo the wiki should be modified to reflect that. |
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ian.au
Guru
Joined: 07 Apr 2011
Posts: 515
Location: Australia
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| Posted: Wed Oct 26, 2016 11:59 am Post subject: |
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| jhon987 wrote: |
Too bad I had wasted half my day trying to make it print using the kernel driver... |
Too bad the original post contained no information on the printer you were trying to install, the hardware and arch upon which you were trying to install it or any single snippet of a fail log. What it did include was the fact that you had a printer that worked, if set up as recommended. So in the light of that, maybe a LART would save your obviously valuable time.
usblp is exactly that, line printing to a usb device. Sorry for assuming that was what you wanted to achieve. |
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Perfect Gentleman
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Joined: 18 May 2014
Posts: 1018
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| Posted: Wed Oct 26, 2016 2:32 pm Post subject: |
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@ian.au, now got CONFIG_MODULE_UNLOAD=y, printer still works
Last edited by Perfect Gentleman on Tue Jan 03, 2017 11:04 am; edited 1 time in total |
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jhon987
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Joined: 18 Nov 2013
Posts: 284
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| Posted: Wed Oct 26, 2016 4:00 pm Post subject: |
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| ian.au wrote: |
maybe a LART would save your obviously valuable time. |
Urban Dictionary:" LART
Luser Attitude Readjustment Tool "
ian.au why like that? I don't recall offending you mate |
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ian.au
Guru
Joined: 07 Apr 2011
Posts: 515
Location: Australia
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| Posted: Wed Oct 26, 2016 9:41 pm Post subject: |
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| Perfect Gentleman wrote: | | @ian.au, now got CONFIG_MODULE_UNLOAD=m, printer still works |
On all my machines this is set to y - I don't recall there being an option to build this as a module.
Anyway, I'm not too sure how we got here? I wouldn't expect the kernel driver to interfere with / break your printer set up like this, although if the module ends up loaded I doubt cups +usb will behave. I don't have anything that uses the usblp module so don't take the overhead to build it and can't test it. |
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ian.au
Guru
Joined: 07 Apr 2011
Posts: 515
Location: Australia
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| Posted: Thu Oct 27, 2016 6:21 am Post subject: |
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| jhon987 wrote: | | ian.au wrote: |
maybe a LART would save your obviously valuable time. |
Urban Dictionary:" LART
Luser Attitude Readjustment Tool "
ian.au why like that? I don't recall offending you mate |
You supplied no information at all in your either your original or subsequent posts, and closed out complaining about having half your day wasted discovering that your printer isn't supported by the kernel driver. Even when it was suggested politely that CUPS +usb is the way to go, you wouldn't accept it (ie. focus on my question, I wanna use the kernel driver etc..). Then when you find out your printer isn't supported by the kernel module you moan about wasting half a day of your time trying to make it work.
I'll suggest that had you stated the make and model of printer, use-case, hardware and kernel version at the outset, you wouldn't have 'wasted' that half-day - ie.:
| Quote: | | Hey my usb attached printer <make: foo, model: bar> on <arch, kernel, env> works fine with cups +usb, but won't work with the in-kernel driver. I tried <things I tried> but they failed with <the resulting messages> - does anyone know if this printer can be made to work with the in-kernel module. |
That would have supplied the information required for someone to respond without guessing, and probably have elicited a response in line with what you needed, ie.: | Quote: | | Sorry mate, that printer isn't compatible with the usblp driver, not many are, it's there for legacy stuff not supported by the modern user-space drivers... and this thread ends within a couple of posts, or: <some specific help for your legacy printer>, had that been the resolution. |
I should have ignored that last post of yours, but it seemed an unfair complaint to me in the circumstances, you're not a noob.
Anyway, no offence intended - I was a bit raw yesterday after having to have my 12yo labrador put down. I should have just let it slide. |
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Lokesh
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Joined: 01 Apr 2012
Posts: 152
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| Posted: Tue Jan 03, 2017 10:59 am Post subject: |
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I would like to comment on this thread even though it is a few months old. It has ended a several years lasting annoyance with CUPS. Thanks a million to the commenters, particularly NeddySeagoon, ian.au and fitzcarraldo.
My printer is the excellent Kyocera-Mita FS 1010 (the old one, dating back maybe 10 years?), attached through usb.Some years ago I began to experience severe problems with printing from "progressive" Linuxes like Arch, Ubuntu etc. With a conservative Debian I could still use the printer, though. But this has also come to an end a few years ago.
How did I print? Using Windows and Apple machines! Works flawlessly 
When I stumbled across this thread I thought I would give it a try. First check revealed that the Kernel driver was permanently loaded. Kicked it out and: YEAH!
In conclusion some (older) printer have severe problems with the default settings of the kernel for usb printing and parallel usage uf the libusb driver. In my case, removing kernel support solved the problem.
| Code: | lsusb
Bus 002 Device 009: ID 0482:0003 Kyocera Corp. |
| Code: | sudo grep -i printer /boot/config-4.4.26-gentoo
# CONFIG_USB_PRINTER is not set |
| Code: | sudo eix -info libusb
[I] virtual/libusb
Verfügbare Versionen:
(0) 0-r2
(1) 1-r1 1-r2
{udev ABI_MIPS="n32 n64 o32" ABI_PPC="32 64" ABI_S390="32 64" ABI_X86="32 64 x32"}
Installierte Versionen: 1-r2(1)(22:30:51 14.11.2016)(udev ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64" ABI_X86="64 -32 -x32")
Beschreibung: Virtual for libusb |
I have read so many posts from people with similar problems, thats why I thought it may be of help to report this.
Thanks again
Lokesh
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