Well, I end up to update kernel-source-2.6.11 from debian unstable
and compile it (after I realised I do not have to use all the unstable
packages
2.6.11 has tda10021 and after installing them I was able to scan
channels.
By the way Terratec Cinergy1200 was not identified with that name
but discover gave followint list.
Phillips SAA7146 is dvb card.

nVidia Corporation nForce2 AGP (different version?)
nVidia Corporation nForce2 Memory Controller 1
nVidia Corporation nForce2 Memory Controller 4
nVidia Corporation nForce2 Memory Controller 3
nVidia Corporation nForce2 Memory Controller 2
nVidia Corporation nForce2 Memory Controller 5
nVidia Corporation nForce2 ISA Bridge
nVidia Corporation nForce2 SMBus (MCP)
nVidia Corporation nForce2 USB Controller
nVidia Corporation nForce2 USB Controller
nVidia Corporation nForce2 USB Controller
nVidia Corporation nForce2 Ethernet Controller
nVidia Corporation nForce MultiMedia audio [Via VT82C686B]
nVidia Corporation nForce2 AC97 Audio Controler (MCP)
nVidia Corporation nForce2 External PCI Bridge
nVidia Corporation nForce2 IDE
nVidia Corporation nForce2 FireWire (IEEE 1394) Controller
nVidia Corporation nForce2 AGP
Marvell Technology Group Ltd. Gigabit Ethernet Controller
Philips Semiconductors SAA7146
Silicon Image, Inc. (formerly CMD Technology Inc) SiI 3112 [SATALink/SATARaid] Serial ATA Controller
nVidia Corporation NV34 [GeForce FX 5200]

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So I mixed up Technotrend and Terratec...
below are the details for CInergy.
budget-av was found from the kernel but
tda10021 was not.
So I guess I need to patch the kernel with tda10021 driver
module. Any help where to find tda10021 module and
how patch is made (never done that)???
-------------------------------------
Terratec Cinergy 1200 DVB-C budget/KNC1 DVB-C

(tda10021/Philips CU1216L(tua6034))

features: fullts, ci, (some versions have AVin as well)
card driver: budget-av
interface: PCI
PCI device id: 1131:7146
PCI subsystem id: 153b:1156 (terratec)
PCI subsystem id: 1894:0020 (knc1)
Bridge: Philips SAA7146A
frontend 1
tin box: Philips CU1216L
frontend driver: tda10021
demodulator location: tin box
demodulator: Philips TDA10021 @0x0C
PLL: Philips tua6034 @0x60
Notes:
-------------------------------------