I reported this a while back but no fix went into the 2.4.3 kernel so I thought I'd ask again. Is this just a problem waiting for a driver? Or have I missed a setting? I have the ALi Magick1 chipset and on boot (and in dmesg) I get the following messages: PCI: PCI BIOS revision 2.10 entry at 0xfb310, last bus=1 PCI: Using configuration type 1 PCI: Probing PCI hardware Unknown bridge resource 0: assuming transparent PCI: Using IRQ router default [10b9/1647] at 00:00.0 < ALI15X3: IDE controller on PCI bus 00 dev 20 PCI: No IRQ known for interrupt pin A of device 00:04.0. ALI15X3: chipset revision 196 ALI15X3: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:pio, hdb:pio ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:DMA This is my system (/proc/pci) PCI devices found: Bus 0, device 0, function 0: Host bridge: PCI device 10b9:1647 (Acer Laboratories Inc. [ALi]) (rev 2). Prefetchable 32 bit memory at 0xf0000000 [0xf3ffffff]. Bus 0, device 1, function 0: PCI bridge: Acer Laboratories Inc. [ALi] M5247 (rev 0). Master Capable. No bursts. Min Gnt=14. Bus 0, device 2, function 0: USB Controller: Acer Laboratories Inc. [ALi] M5237 USB (rev 3). IRQ 5. Master Capable. Latency=32. Max Lat=80. Non-prefetchable 32 bit memory at 0xdf001000 [0xdf001fff]. Bus 0, device 4, function 0: IDE interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev 196). Master Capable. Latency=32. Min Gnt=2.Max Lat=4. I/O at 0xd000 [0xd00f]. Bus 0, device 7, function 0: ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge [Aladdin IV] (rev 0). Bus 0, device 10, function 0: Multimedia audio controller: Creative Labs SB Live! EMU10000 (rev 8). IRQ 12. Master Capable. Latency=32. Min Gnt=2.Max Lat=20. I/O at 0xd400 [0xd41f]. Bus 0, device 10, function 1: Input device controller: Creative Labs SB Live! (rev 8). Master Capable. Latency=32. I/O at 0xd800 [0xd807]. Bus 0, device 11, function 0: SCSI storage controller: Adaptec AHA-2940U2/W (rev 0). IRQ 10. Master Capable. Latency=32. Min Gnt=39.Max Lat=25. I/O at 0xdc00 [0xdcff]. Non-prefetchable 64 bit memory at 0xdf000000 [0xdf000fff]. Bus 0, device 12, function 0: Ethernet controller: 3Com Corporation 3c905 100BaseTX [Boomerang] (rev 0). IRQ 11. Master Capable. Latency=32. Min Gnt=3.Max Lat=8. I/O at 0xe000 [0xe03f]. Bus 0, device 17, function 0: Bridge: Acer Laboratories Inc. [ALi] M7101 PMU (rev 0). Bus 1, device 0, function 0: VGA compatible controller: nVidia Corporation GeForce 256 DDR (rev 16). IRQ 11. Master Capable. Latency=248. Min Gnt=5.Max Lat=1. Non-prefetchable 32 bit memory at 0xdc000000 [0xdcffffff]. Prefetchable 32 bit memory at 0xd0000000 [0xd7ffffff]. and finally my .config: