Printing problem with kernel 2.6

[DonHora]

Hi

I've got a HP LaserJet 6L connected with my computer via a parallel cable.

Under kernel 2.4.22, I can print with no problem at all. Everything's working fine. But under kernel 2.6 (vanilla 2.6.3 and 2.6.5 tested) I can't print.

After some research, I found that a 'cat /dev/lp0' returns correct data under 2.4, but exits with "Input/Output Error" under 2.6. The 'cat test.txt > /dev/lp0' method found in the Gentoo Printing HOWTO works under 2.4 but not under 2.6.

Under 2.6, 'cat /proc/sys/dev/parport/parport0/autoprobe' returns :

[TheRAt]

You are doing:

[DonHora]

[DonHora]

*update*

To access the printer device I must do :

[|Quantum|]

Hey!

I have exactly the same problem. The first time parport, parport_pc and lp are loaded, it won' t work. In this case, it seems the port is detected correctly, but when I do -for example- ls >/dev/lp0 then nothing happens. I have to hit CTRL-C to end it. Also CUPS seems to ignore print jobs, it doesn't hang and it doesn't log anything.
I have to unload all 3 modules (yep, I tested it: all the way down to parport which doesn't depend on other modules), and then reload them.

I *do* get those nasty "spurious IRQ" messages in the kernel log but until kernel 2.4.x this was never a problem. Also for a while, the first time de modules are loaded I got a detected port, but only PCSPP, TRISTATE. Then the second time I god PCSPP, TRISTATE, EPP, ECP, FIFO.

I checked my BIOS and it was set to ECP/EPP combi mode. I changed it to ECP only and since then de port is detected correctly the first time, but it DOES NOT work!
I also tried to emerge to udev, because I thought maybe something was wrong with the device driver. No change.

This is very annoying because I like to compile small drivers which are always needen right into the kernel. But because it's not working, the only way to print is compiling as modules and *manually* unload/reload the drivers!

I have an Epson Stylus C62. config.gz will follow in next post

-D-

[|Quantum|]

OK folks here is my kernel config.

http://www.student.kuleuven.ac.be/~m9600065/config

[DonHora]

So, I'm not the only one having this problem. I will fill a bug report to gentoo bugzilla. Here is a temporary workaround:
Add the following lines to "/etc/conf.d/local.start":

[|Quantum|]

OK,

I want to add http://www.student.kuleuven.ac.be/~m9600065/kernel.txt to the story.
Please note the message about "Weird Via 686A parport base 0x0"

I haven't noticed it until recently.
Maybe your config is doing the same thing no?

[DonHora]

[|Quantum|]

Hmmm yes very interesting, so you have the same chipset I suppose.

Now we have to get the attention of those Gentoo-guru's

-D-

[bk0]

I also have an HP Laserjet 6L, and suddenly starting with 2.6.5 (possibly 2.6.5-r1) it stopped working (all previous 2.6 kernels worked fine).

Manually loading the "lp" kernel module fixes the problem. Weird.

[archsvile]

If u need help setting up yer prinyter i can help u. IM me at : teddienv1ruzx im usally on all the time
_________________
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[bubblesorter2]

I have the very same problem (same VIA chipset as well) and definitely the pnp device 00:10 is the parallel port (see below)

parport0: Printer, Canon BJC-6000
parport_pc: Via 686A parallel port: io=0x378
pnp: the driver 'parport_pc' has been registered
pnp: match found with the PnP device '00:10' and the driver 'parport_pc'
parport: PnPBIOS parport detected.
uhci_hcd 0000:00:07.2: port 2 portsc 0099
hub 1-0:1.0: debounce: port 2: delay 100ms stable 4 status 0x101
pnp: Device 00:10 disabled.

I'm going to make some research on pnp in kernel 2.6, any help appreciated