Problem making a SAA7146 - based DVR board to work on Debian

Hello.
I have trouble setting a Samsung 7146-based DVR board to work with Linux.
The lspci output is as follows:

ion@Arbaiten:~$ lspci
00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
00:01.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to AGP Controller (rev 02)
00:06.0 System peripheral: Intel Corporation 82865G/PE/P Processor to I/O Memory Interface (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 440 AGP 8x] (rev a2)
02:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
02:0d.0 PCI bridge: Actiontec Electronics Inc Mini-PCI bridge (rev 11)
03:0c.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
03:0d.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
03:0e.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
03:0f.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)

As much as I understood, the SAA7146 controllers are used for video processing. So after I found that it is supported by the Linux kernel, I started experimenting with them. Now I'm using the stock Debian Wheezy kernel 2.6.39, and when the card modules are loaded into the kernel, I get the following in /var/log/messages:

Aug  3 14:38:41 Arbaiten kernel: [  584.264556] Multimedia eXtension Board 0000:03:0f.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
Aug  3 14:38:41 Arbaiten kernel: [  584.264600] saa7146: found saa7146 @ mem f84fe000 (revision 1, irq 20) (0x0000,0x0000).
Aug  3 14:38:43 Arbaiten kernel: [  586.066933] tea6420 2-004c: chip found @ 0x98 (mxb0)
Aug  3 14:38:43 Arbaiten kernel: [  586.306924] tea6420 2-004d: chip found @ 0x9a (mxb0)
Aug  3 14:38:43 Arbaiten kernel: [  586.546920] tea6415c 2-0043: chip found @ 0x86 (mxb0)
Aug  3 14:38:43 Arbaiten kernel: [  586.553226] tda9840 2-0042: chip found @ 0x84 (mxb0)
Aug  3 14:38:43 Arbaiten kernel: [  586.792172] It is not a TEA5767. Received -121 bytes.
Aug  3 14:38:43 Arbaiten kernel: [  586.792341] tuner 2-0060: Tuner -1 found with type(s) Radio TV.
Aug  3 14:38:43 Arbaiten kernel: [  586.792355] mxb: did not find all i2c devices. aborting
Aug  3 14:38:43 Arbaiten kernel: [  586.792533] Multimedia eXtension Board 0000:03:0f.0: PCI INT A disabled

This message is triggered after I reload the mxb kernel module.
How can I make this card work?

It's not as simple as you think. Just because there are a collection of chips on a board similar to other boards that are known to work doesn't mean yours will work.

Also, the meaning of "works" is very fluid for these multimedia devices in Linux. Some live up to the ideal, others, well....

Hopefully, you aren't out too much money.