Ok i got this problem:
with knoppix 3.7, when I'm running it from the CD with the knoppix26 cheat code, my sound card is detected
but I installed it on my hd and now the sound card is not detected anymore
here's the output of lspci -v

Code:
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 81)
        Flags: bus master, medium devsel, latency 8
        Memory at d8000000 (32-bit, prefetchable) [size=64M]
        Capabilities: [a0] AGP version 2.0
        Capabilities: [c0] Power Management version 2

0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, medium devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        Memory behind bridge: dc000000-ddffffff
        Prefetchable memory behind bridge: d0000000-d7ffffff
        Capabilities: [80] Power Management version 2

0000:00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
        Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
        Flags: bus master, stepping, medium devsel, latency 0
        Capabilities: [c0] Power Management version 2

0000:00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
        Flags: bus master, medium devsel, latency 32
        I/O ports at c000 [size=16]
        Capabilities: [c0] Power Management version 2

0000:00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 1a) (prog-if 00 [UHCI])
        Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
        Flags: bus master, medium devsel, latency 32, IRQ 5
        I/O ports at c400 [size=32]
        Capabilities: [80] Power Management version 2

0000:00:07.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 1a) (prog-if 00 [UHCI])
        Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
        Flags: bus master, medium devsel, latency 32, IRQ 5
        I/O ports at c800 [size=32]
        Capabilities: [80] Power Management version 2

0000:00:07.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
        Flags: medium devsel, IRQ 9
        Capabilities: [68] Power Management version 2

0000:00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 50)
        Subsystem: Micro-Star International Co., Ltd.: Unknown device 3400
        Flags: medium devsel, IRQ 12
        I/O ports at cc00 [size=256]
        I/O ports at d000 [size=4]
        I/O ports at d400 [size=4]
        Capabilities: [c0] Power Management version 2

0000:00:09.0 Network controller: Intersil Corporation Intersil ISL3890 [Prism GT/Prism Duette] (rev 01)
        Subsystem: Standard Microsystems Corp [SMC]: Unknown device 2802
        Flags: bus master, medium devsel, latency 80, IRQ 11
        Memory at de000000 (32-bit, non-prefetchable) [size=8K]
        Capabilities: [dc] Power Management version 1

0000:00:0a.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
        Subsystem: Creative Labs SB Live! 5.1 Model SB0100
        Flags: bus master, medium devsel, latency 32, IRQ 12
        I/O ports at dc00 [size=32]
        Capabilities: [dc] Power Management version 1

0000:00:0a.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 07)
        Subsystem: Creative Labs Gameport Joystick
        Flags: bus master, medium devsel, latency 32
        I/O ports at e000 [size=8]
        Capabilities: [dc] Power Management version 1

0000:01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev b2) (prog-if 00 [VGA])
        Subsystem: Asustek Computer, Inc. V7100 Pro with TV output
        Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 10
        Memory at dc000000 (32-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (32-bit, prefetchable) [size=128M]
        Capabilities: [60] Power Management version 2
        Capabilities: [44] AGP version 2.0