CUPS ACL problem

[snpy]

Hi,

I just installed alarm on a PogoPlug Pro (black one) and want to say thanks for all the great work. I'm very new to alarm so I'm still feeling my way around... but I've used slack, kanotix, sidux, debian, ubuntu, and also redhat at work, etc. Very cool.

I'm trying to setup an old and cheap usb ML-2010 printer to it so that it can be used on the home network. lsusb showed that it is detected in the PogoPlug Pro. This printer uses the splix driver, so I installed it with pacman (which I have successfully set up in ubuntu). I followed the wiki page (CUPS with Apple AirPrint, and noticed some differences) to get webmin and cups started:

Step 4: /etc/rc.d/cups start
==> /etc/rc.d/cupsd start

Step 12: DeviceURI usb:/dev/usblp0
==> usb:/dev/usb/lp0

Step 13: edit /etc/cups/cupsd.conf

Listen localhost:631
==> Listen *:631

#Restrict access to the server to your local network:
<Location />
Order allow,deny
allow 192.168.0.1 192.168.0.* 192.168.0.***
</Location>
# Restrict access to the admin pages...
<Location /admin>
Order allow,deny
allow 192.168.0.*
</Location>

I wasn't able to access CUPS from another machine, so I changed all the allow lines to
allow @LOCAL


to get it to work.

However, after all the setup, it does not print a test page. The following errors are found in /var/log/cups/error_log

D [16/Dec/2011:20:57:17 -0600] Discarding unused server-stopped event...
D [16/Dec/2011:20:57:17 -0600] cupsdDeregisterPrinter(p=0x2a086840(ML-2010-pogo), removeit=1)
I [16/Dec/2011:20:57:17 -0600] Saving job.cache...
E [16/Dec/2011:20:57:21 -0600] Unable to set ACLs on root certificate "/var/run/cups/certs/0" - Operation not supported
E [16/Dec/2011:20:59:35 -0600] [Job 12] Stopping job because the scheduler could not open the output file.
E [16/Dec/2011:21:04:38 -0600] [Job 12] Stopping unresponsive job!

I tried googling and saw lots of references about ACLs but no definite fix. Any one have any idea what I missed and what I need to do?

BTW, I also tried to set it up using lynx on localhost:631, but it doesn't list the printer as I have seen on the other ubuntu machine.

Thanks a lot.

[pepedog]

Not this
allow 192.168.0.1 192.168.0.* 192.168.0.***
Just this
allow 192.168.0.*

Who makes the ml 2010? Hope driver doesn't have x86 binary blobs in

$this->bbcode_second_pass_quote('snpy', 'I') tried googling and saw lots of references about ACLs but no definite fix. Any one have any idea what I missed and what I need to do?

[snpy]

To pepedog: the printer is by Samsung. I never thought about the x86 issue, but I also had problem installing it on an old iBook (PowerPC), which prints only black lines or blank pages. But splix is an open source driver, so I'm not leaning towards that as a problem.

To Geoff: Before I installed the splix package in alarm, the printer driver was not listed when I tried to install, that's why I went back to splix. I also used the splix driver on my other ubuntu machine. (the splix driver was actually supposed to provide a better resolution than default). I will try your method and config and see if it works.


Thanks a lot.

[snpy]

OK, using the suggestions from Geoff and after trying it many times (on several days), I am almost there. It works if I reboot the machine (despite a couple of error messages about splix), but if I were to turn off the printer and turn it back again without rebooting, I cannot print the test page. It gives the error:

[Job 94] Stopping job because the scheduler could not open the output file.

It still refused to print even if I restart cups with:
/etc/rc.d/cupsd restart

So, I first suspected the usb ports might have changed, but both times, it was connected to
[root@alarm ~]# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 003: ID 04e8:326c Samsung Electronics Co., Ltd ML-2010P Mono Laser Printer
Bus 001 Device 004: ID 0325:ac02 OCZ Technology Inc ATV Turbo / Rally2 Dual Channel USB 2.0 Flash Drive

I also checked the permissions on the /dev/usb/lp0 and /dev/usb/001/003 and they were the same.

So, I turned on debug messages in cupsd.conf, restarted cupsd, printed a test page and diff'ed the error_log files and noticed that the first difference was at:

(from failed job)
< [Job 94] Started filter /usr/lib/cups/filter/bannertops (PID 1213)
< [Job 94] Started filter /usr/lib/cups/filter/pstops (PID 1214)
< [Job 94] Started filter /usr/lib/cups/filter/gstoraster (PID 1215)

(from successful job)
> [Job 96] Started filter /usr/lib/cups/filter/bannertops (PID 1006)
> [Job 96] Started filter /usr/lib/cups/filter/pstops (PID 1007)
> [Job 96] Started filter /usr/lib/cups/filter/gstoraster (PID 1008)
> [Job 96] Started filter /usr/lib/cups/filter/rastertoqpdl (PID 1009)

So, it failed to call rastertoqpdl when it failed to print, but there is no indication as to why. The permissions have not changed in the two cases.
-rwxr-xr-x 1 root root 22616 Sep 1 22:28 /usr/lib/cups/filter/gstoraster

Anyone knows why cups is failing to call the script? And if any one has any idea how to deal with this problem.

Thanks a lot.

[Geoff]

When I set up my printer this way, I had to try a couple of different PPD configuration files (as provided by hplip) before I got it to work properly. Some configurations work better than others. I think there are two available for your printer. Perhaps one of these tries to use utilities (rastertoqpdl) that you don't have, so maybe it's worth trying out the other one at this point.

[snpy]

rastertoqpdl should be there since it gets printed when rebooted. I tried hplip, but didn't see any driver for the printer when modifying the printer. So, I tried various gutenprint drivers, but still nothing. openprinting.org shows only splix and gdi, but I'm not sure which package provides that. I also tried to remove the usblp module with rmmod, but it hung.

Not sure what else I can try. Thanks.

[Geoff]

I just bought and upgraded a Pogo Pro as a Christmas present for my sister. When I tried to configure her printers on it, I ran into a similar problem. Her old HP LaserJet 1020 requires firmware to be loaded every time it is switched on. I read here that it's possible to write udev rules for this. It sounds like that might be what you need too. On the other hand, I didn't even get so far as finding a driver, which is supposed to exist in foo2zjs (from AUR).

[snpy]

I should say, I tried many things after googling, but still have the same symptoms.
I've tried blacklisting usblp, didn't work.
Tried rmmod -f, hung every time.
Tried turning off printer for a long time (>30mins) before turning it back on, sometimes works, mostly did not... probably related to module still not being unloaded.
Tried installing cups-usblp from AUR, but got lots of missing dependencies. Fixed one at a time but it finally just fails to compile with no error message... Tried to turn on error messages for compilation but still gave me nothing, so I don't know what is the problem (googling shows there is a bug report on this).
Haven't tried udev yet, since I'm not familiar with it. Will have to read up on the manpage on this.

Thanks.