Hello!
I have a similar problem here with saa7134: could not initialize (lib)hal context

0.000000] Linux version 2.6.24-15-generic (buildd@palmer) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)) #1 SMP Tue Apr 8 00:33:51 UTC 2008 (Ubuntu 2.6.24-15.27-generic)

48.843603] tuner 0-0043: chip found @ 0x86 (saa7134[0])
48.843652] tda9887 0-0043: tda988[5/6/7] found @ 0x43 (tuner)
48.843655] tuner 0-0043: type set to tda9887
48.851593] tuner 0-0061: chip found @ 0xc2 (saa7134[0])
48.851619] tuner-simple 0-0061: type set to 51 (Philips PAL/SECAM_D (FM 1256 I-H3))
48.851623] tuner 0-0061: type set to Philips PAL/SECAM_D
48.851628] tuner-simple 0-0061: type set to 51 (Philips PAL/SECAM_D (FM 1256 I-H3))
48.851632] tuner 0-0061: type set to Philips PAL/SECAM_D
48.854206] saa7134[0]: registered device video0 [v4l2]
48.854236] saa7134[0]: registered device vbi0
48.854268] saa7134[0]: registered device radio0
48.972143] saa7134 ALSA driver for DMA sound loaded
48.972185] saa7134[0]/alsa: saa7134[0] at 0xfdcff000 irq 20 registered as card -2
48.972289] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000001
48.972297] printing eip: f90cc745 *pde = 00000000 
48.972304] Oops: 0000 [#1] SMP 
48.972310] Modules linked in: saa7134_alsa tuner tea5767 tda8290 tuner_simple mt20xx tea5761 snd_pcm snd_page_alloc snd_hwdep nvidia(P) saa7134 snd_seq_dummy compat_ioctl32 videobuf_dma_sg snd_seq_oss videobuf_core ir_kbd_i2c i2c_core snd_seq_midi ir_common snd_rawmidi videodev snd_seq_midi_event v4l2_common v4l1_compat snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support button shpchp snd pci_hotplug soundcore pcspkr intel_agp agpgart ext3 jbd mbcache sg sr_mod sd_mod cdrom ata_generic usbhid hid ata_piix pata_acpi floppy libata scsi_mod ehci_hcd tg3 uhci_hcd usbcore thermal processor fan fuse vesafb fbcon tileblit font bitblit softcursor
48.972378] 
48.972382] Pid: 3350, comm: modprobe Tainted: P        (2.6.24-15-generic #1)
48.972386] EIP: 0060:[<f90cc745>] EFLAGS: 00010246 CPU: 0
48.972403] EIP is at snd_pcm_timer_init+0x25/0x170 [snd_pcm]
48.972406] EAX: 00000001 EBX: dfbd7000 ECX: dfa63ddc EDX: 00000000
48.972410] ESI: dfbd71d4 EDI: dfadc234 EBP: 00000018 ESP: dfa63dc4
48.972413]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
48.972416] Process modprobe (pid: 3350, ti=dfa62000 task=df9c2b40 task.ti=dfa62000)
48.972419] Stack: 00000000 00000001 dfadc800 00000000 dfadc800 00000000 00000003 00000000 
48.972429]        dfbd7000 00000018 f8fec20c 00000000 dfbd71d4 dfadc200 f90c467f f90d592c 
48.972439]        dfadc200 dfa63e18 dfadc400 00000001 f90cd5f4 436d6370 63304431 ffffff00 
48.972449] Call Trace:
48.972467]  [<f8fec20c>] snd_add_device_sysfs_file+0x3c/0x70 [snd]
48.972488]  [<f90c467f>] snd_pcm_dev_register+0xef/0x200 [snd_pcm]
48.972527]  [<f8ff0e4d>] snd_device_register_all+0x2d/0x60 [snd]
48.972548]  [<f8feca1e>] snd_card_register+0x1e/0x320 [snd]
48.972576]  [<f907e31a>] alsa_device_init+0x23a/0x280 [saa7134_alsa]
48.972600]  [<f907e3cb>] saa7134_alsa_init+0x6b/0xc0 [saa7134_alsa]
48.972612]  [sys_init_module+0x126/0x19c0] sys_init_module+0x126/0x19c0
48.972673]  [<f90cca80>] snd_pcm_format_width+0x0/0x20 [snd_pcm]
48.972713]  [sysenter_past_esp+0x6b/0xa9] sysenter_past_esp+0x6b/0xa9
48.972747]  =======================
48.972749] Code: 5b c3 8d 74 26 00 56 89 c6 53 83 ec 30 8b 56 30 c7 44 24 1c 00 00 00 00 8d 4c 24 18 c7 44 24 18 03 00 00 00 8b 18 83 e2 01 8b 03 <8b> 00 89 44 24 20 8b 43 0c 89 44 24 24 8b 46 0c 01 c0 09 c2 8d 
48.972802] EIP: [<f90cc745>] snd_pcm_timer_init+0x25/0x170 [snd_pcm] SS:ESP 0068:dfa63dc4
48.972819] ---[ end trace 8fb4c66bd11f1142 ]---

pulseaudio[8019]: module-hal-detect.c: Couldn't connect to hald: (null): (null)
pulseaudio[8019]: module.c: Failed to load  module "module-hal-detect" (argument: ""): initialization failed.
pulseaudio[8019]: main.c: Module load failed.
pulseaudio[8019]: main.c: Failed to initialize daemon.