FYI, i810 audio still has problems. No sound at all and kernel says:
Nov 14 11:38:30 espoo kernel: agpgart: Detected an Intel i810 E Chipset.
Nov 14 11:38:30 espoo kernel: agpgart: detected 4MB dedicated video ram.
Nov 14 11:38:30 espoo kernel: agpgart: AGP aperture is 64M @ 0x44000000
Nov 14 11:38:30 espoo kernel: [drm] AGP 0.99 on Intel i810 @ 0x44000000 64MB
Nov 14 11:38:30 espoo kernel: [drm] Initialized i810 1.1.0 20000928 on minor 63
Nov 14 11:38:30 espoo kernel: SCSI subsystem driver Revision: 1.00
Nov 14 11:38:30 espoo kernel: Intel 810 + AC97 Audio, version 0.01, 10:26:18 Nov 14 2000
Nov 14 11:38:30 espoo kernel: PCI: Setting latency timer of device 00:1f.5 to 64
Nov 14 11:38:30 espoo kernel: i810: Intel ICH 82801AA found at IO 0x2400 and 0x2000, IRQ 11
Nov 14 11:38:30 espoo kernel: ac97_codec: AC97 Audio codec, id: 0x4144:0x5340 (Analog Devices AD1881)
[...]
Nov 14 11:44:12 espoo kernel: DMA overrun on send
Nov 14 11:45:46 espoo last message repeated 3 times
Nov 14 11:45:47 espoo kernel: i810_audio: drain_dac, dma timeout?
Nov 14 11:46:00 espoo kernel: DMA overrun on send
Nov 14 11:46:00 espoo kernel: i810_audio: drain_dac, dma timeout?
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Frank