Hehe, you can tell us the board you have.

I have a similar system to you, Athlon 64 3400+ SSE2 only and a X1600 256MB AGP. I have the Asus A8N-E Deluxe with nForce 3 chipset and everything is working out of the box. I made a direct copy of a working system which was working on a bord with nForce 4 chipset. The onboard components and the gfx card are identical, so this was no problem. Then I replaced the kernel with ToH 9.0.0. I could boot witout problems, but after the booting process I got only a blue screen with mouse cursor. If I moved the mouse in the right lower corner (I have Exposé all windows there) I always got a crashing bang from the speakers I tried AGPGart and some other AGP-related patches but no success, only a kernel panic.

Seems we've to wait a little till using Leopard on AGP.

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2 Opteron systems: OSx86 10.5.8, Andy's 9.8.0 kernel, Asus A8N-SLI Premium, Opteron 185 o'clocked @ 2 x 2,95 GHz (2nd system 2.6 GHz), ATI Radeon HD2600XT 256MB Dual-Monitor 2x HP L2035, 4 GB RAM, Griffin FireWave as main audio device, Marvell + nForce LAN, Asus U3S6 USB3/SATA6 card, 5,5 TB harddisk, Firewire 800 card, Apple Remote + eHome IR receiver, 2x Wacom serial graphics tablet, Canon Pixma iP4700, Logitech Internet Navigator wireless keyboard/mouse combination.

My Audio stuff: M-Audio Transit USB (default audio), M-Audio ProFire 610, M-Audio ProFire Lightbridge (34 channels) using Creamware A16 ADAT converter • MIDI: M-Audio Midiman 4x MIDI interface • Behringer Audio Mixers: Xenyx 1002, Xenyx 1002FX, Xenyx 1202FX, Eurorack UB1002FX, Eurorack MX1804FX, Eurorack MX262A • FX devices: Lexicon MPX100 DSP, Behringer DSP-1000 Virtualizer, Behringer MiniFEX 800 DSP, Behringer Multicom Pro MDX4400 compressor • RETRO: MSSIAH midi/sequencer/synthesizer cardridge for the C64 (Dual-SID), Steinberg M.S.I. MIDI Interface for C64