Re: lpt0 always busy

From: Dan Ponte (dcp1990_at_neptune.atopia.net)
Date: 09/24/05

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    Date: Sat, 24 Sep 2005 12:35:01 -0400
To: freebsd-stable@freebsd.org

    On Sat, Sep 24, 2005 at 06:09:09PM +0200, stanley jobson <stanley.jobson@gmx.ch> was witnessed plotting the following conspiracy:
    > hi,
    > i am now trying for weeks to get my lpt0 working without any success :(
    >
    > i always get "device busy" (running lptcontrol, lptest,
    > open(/dev/lpt0)). i found a lot of questions about this via google and
    > some hints too (e.g. excluding device ppi from kernel) but all this
    > didnt help :(
    >
    > i should mention that my printer connected to lpt0 is a funny gdi
    > printer which only works under win98. so my idea was to use qemu to run
    > a emulated win98 to get my printer working - but therefore qemu needs to
    > be able to open /dev/lpt0 ...
    >
    > finally i wrote a simple c prog which just calls open(/dev/lpt0) but it
    > also always fails with device busy :(
    >
    > what are the requirements to successfully open lpt0 port (apart from
    > having connected a printer to it) ?
    >
    > does fbsd expects a response from the printer (e.g. ready status)? maybe
    > my printer is not able to do this ... if so: what are possible
    > workarounds? could i convice the kernel that lpt0 is ready?
    >
    > thx
    > regards,
    > stan
    >
    > ps: i am running fbsd 5.4
    >
    Usually, if you get "device busy," it means that the printer is simply
    not on or connected properly. Check your parallel cable.
    -Dan 

    -- 
Dan Ponte
http://www.theamigan.net/
A great many people think they are thinking when they are merely
rearranging their prejudices.
		-- William James
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