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c.f. bug 424647
List Archive: gentoo-sparc
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To: gentoo-sparc@g.o
From: 张韡武 <zhangweiwu@...>
Subject: [SOLVED] Re: parallel port printer stop working on 2.6 kernel
Date: Mon, 18 Dec 2006 20:11:12 +0800
I finally solved this myself. The trick is, for some reason I am not
sure of, I have broken device node /dev/lp0 when doing upgrading. The
next time I start to print something, cups send the output to /dev/lp0,
creating a normal file there, so I didn't notice /dev/lp0 had been
missing.

The solution is to:
# rm /dev/lp0
# mknod /dev/lp0 c 6 0

Then the printer start to work.

在 2006-12-18一的 20:00 +0800,张韡武写道:
> I have been struggling with this issue for a long time: using 2.6
> kernel, device /dev/lp0 swallow all input to it without error, and
> nothing comes out from the printer.
> 
> example:
> $ dmesg > /dev/lp0
> $ [no output on commandline, no output from printer, nothing happens]
> 
> also cups running on this server shows every job is completed, nothing
> comes out in paper form.
> 
> Here is the dmesg section that seems to be related to this issue:
> 
> [    5.293312] lp: driver loaded but no devices found
> [    5.340515] rtc_init: no PC rtc found
> [    5.380379] /pci@1f,0/pci@1,1/ebus@1/su@14,3083f8: Keyboard port at 1fff13083f8, irq 6
> [    5.472406] /pci@1f,0/pci@1,1/ebus@1/su@14,3062f8: Mouse port at 1fff13062f8, irq 7
> [    5.561939] parport0: PC-style at 0x1fff13043bc (0x1fff13047bc), irq 8, dma 0 [PCSPP,TRISTATE,COMPAT,ECP,DMA]
> [    5.812374] parport0: Printer, Hewlett-Packard hp LaserJet 3015
> [    5.979388] lp0: using parport0 (interrupt-driven).
> 
> from dmesg it seems kernel not only able to detect parallel port, but
> also possible to activate ECP mode and detect printer model (which is
> correct). I also have activated all kernel configuration options I can
> think of. I attached my kernel configuration file as well as whole dmesg
> output hoping that can help.
> 
> The machine is Ultrasparc U5. It has been serving as print server for
> more then one year, or probably two years.
> 
-- 
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References:
parallel port printer stop working on 2.6 kernel
-- 张韡武
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Updated Jun 17, 2009

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