New kernel / stable Debian fails to detect USB printers
I still cannot normally operate any USB printer connected to my system after I upgraded to stable Lenny with the stock 2.6.26-2-amd64 kernel.
It's clear now after more testing that this problem described below is not ehci_hcd specific as I can get the "module reload" workaround kludge to work with any of the three USB modules.
What I'd like to know is if there's anything else I can do to get this to work properly. This problem only happened after upgrading to the latest "stable" Debian.
Right now if I ever want to print I have to unload ehci_hcd (or uhci_hcd or ohci_hcd) and then reload it after the printer is on. Otherwise they do not see my printer when it's turned on. Do I need to have some other module loaded for autodetection to take place? Does this have to do with udev or hotswap? I'm stumped and could use some help.
I'd also like to know if this is a bug or if I just did something wrong. And is there a better place to ask this question then debian-user or am I at the right place? I appreciate any help or guidance since I am not a technology oriented person.
Thanks,
Jen
--- On Thu, 2/18/10, Jen Craigson <jenniscomputer@ymail.com> wrote:
> From: Jen Craigson <jenniscomputer@ymail.com>
> Subject: Re: ehci_hcd has to be manually reloaded for USB 2.0 printer
> To: debian-user@lists.debian.org
> Date: Thursday, February 18, 2010, 9:35 PM
> --- On Thu, 2/18/10, Clive
> Standbridge <Clive.Standbridge@myriadgroup.com>
> wrote:
>
> > Hi Jen,
> >
> > In my /etc/modules I have the following comment and
> > module:
> >
> > # Allow USB printer to be powered up after boot.
> > usblp
> >
> > I'm afraid I don't know how or where I found that out.
> I
> > think it's
> > been there since pre-lenny.
>
> Hi Clive!
>
> It seems like usblp is loading every time with this new
> kernel (in the upgrade I'm using the 2.6.26-2-amd64 kernel
> that was upgraded instead of the older one I "rolled"
> myself.... seems so much better with just about anything
> anyway!).
>
> I'll try putting usblp in /etc/modules anyway to see if
> this matters.
>
>
> > Also I don't know whether the order of modules in
> > /etc/modules is
> > significant; you might want to experiment with that.
>
> Good thinking... I have been trying every combination of
> ehci_hcd,uhci_hcd,and ohci_hcd to see if I can shake this
> thing up! I discovered that I don't need ehci_hcd at all,
> that the printer will work with EITHER ohci_hcd or uhci_hcd,
> but in both/either cases I have to load (or reload) the
> module AFTER the printer is on... or just boot with the
> printer on... but neither case is a solution!
>
> Thanks everyone for any wisdom or advice. Why would USB go
> wacky on an upgrade to Lenny I don't know, but that's what's
> going on here! (Actually not even "usb" but just the USB
> printers. My USB plug-in drives all work fine no matter
> what!)
>
> Jen
>
>
>
>
>
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