Hello
I have a printing problem after updating kernel and cups.
Kernel: kernel-2.6.10-1.737_FC3
Cups: cups-1.1.22-0.rc1.8.3
I'm using SELinux.

The printer (HP) is not detected by the printer config. It gives a message:
Printer not connected; will retry in 30 seconds...
I've tested the printer port and printer in dos mode. Everything is working fine, so there is no hardware problem.
The printer is connected by LPT ( /dev/lp0)

It's also a problem with a printer connect with HP Jet direct. It gives a message:
Connected to hosts, sending print job...

Out put from dmesg:
lp: driver loaded but no devices found
Unable to handle kernel NULL pointer dereference at virtual address 00000154
printing eip:
c01ba97e
*pde = 1ceda067
Oops: 0000 [#1]
Modules linked in: lp md5 ipv6 autofs4 i2c_dev i2c_core vmnet(U) parport_pc parport vmmon(U) sunrpc iptable_filter ip_tables dm_mod video button battery ac uhci_hcd hw_random snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc 3c59x floppy ext3 jbd
CPU: 0
EIP: 0060:[<c01ba97e>] Tainted: P VLI
EFLAGS: 00010206 (2.6.10-1.737_FC3)
EIP is at selinux_proc_get_sid+0x65/0xcf
eax: 00000fff ebx: 00000004 ecx: dd6d6000 edx: dd6d6fff
esi: dd6d6ffe edi: 00000000 ebp: 00000124 esp: dc4fdf28
ds: 007b es: 007b ss: 0068
Process parallel (pid: 3817, threadinfo=dc4fd000 task=dc45c890)
Stack: dc4fdf3c dd6d6000 dc4fdf4c 00000006 00000004 df78a90c 00000000 dcb66a40
c01bb6c0 c034fd00 00000004 df78a90c dfa33c00 00000000 c01211e0 b7fff000
c0344b60 c0344b60 dfa33c00 00000400 dc4fdfac c012124d 00000400 dc4fdfac
Call Trace:
[<c01bb6c0>] selinux_sysctl+0x3c/0x96
[<c01211e0>] do_rw_proc+0x4e/0x97
[<c012124d>] proc_readsys+0x10/0x13
[<c015dc77>] vfs_read+0xb6/0xe2
[<c015de8a>] sys_read+0x3c/0x62
[<c0103337>] syscall_call+0x7/0xb
Code: 24 04 c6 80 ff 0f 00 00 00 8b 74 24 04 81 c2 ff 0f 00 00 8b 4c 24 04 b8 ff 0f 00 00 81 c6 fe 0f 00 00 c6 81 fe 0f 00 00 2f eb 3a <3b> 6d 30 74 39 0f b7 5d 04 29 d8 48 78 30 29 da 8b 75 08 8d 4a

Regards
Ketil

Reinstall to kernel-2.6.9-1.724_FC3 and everything worked again.
Most likely something with the kernel and my Compaq Deskpro EXM.
Regards
Ketil

Got the same problem with kernel kernel-2.6.10-1.741_FC3, but found a solution on the web. Add these settings to the end of modprobe.conf

alias parport_lowlevel parport_pc
options parport_pc io=0x378,0x278 irq=7,auto

Regards
Ketil