I get the following on an AM2 AMD5000+, nvidia gigabyte motherboard. Irq 169 is the USB. Anyone know why this is happening? If I install Centos 4.5 I do not get this. THanks, Jerry Oct 19 23:43:58 TESTING kernel: irq 169: nobody cared (try booting with the "irqpoll" option) Oct 19 23:43:58 TESTING kernel: Oct 19 23:43:58 TESTING kernel: Call Trace: Oct 19 23:43:58 TESTING kernel: <IRQ> [<ffffffff800b382a>] __report_bad_irq+0x30/0x7d Oct 19 23:43:58 TESTING kernel: [<ffffffff800b3a5d>] note_interrupt+0x1e6/0x227 Oct 19 23:43:58 TESTING kernel: [<ffffffff800b2f92>] __do_IRQ+0xc7/0x105 Oct 19 23:43:58 TESTING kernel: [<ffffffff80011c19>] __do_softirq+0x5e/0xd5 Oct 19 23:43:58 TESTING kernel: [<ffffffff8006a167>] do_IRQ+0xe7/0xf5 Oct 19 23:43:58 TESTING kernel: [<ffffffff80068ab8>] default_idle+0x0/0x50 Oct 19 23:43:58 TESTING kernel: [<ffffffff8005b649>] ret_from_intr+0x0/0xa Oct 19 23:43:58 TESTING kernel: <EOI> [<ffffffff80068ae1>] default_idle+0x29/0x50 Oct 19 23:43:58 TESTING kernel: [<ffffffff80046fb8>] cpu_idle+0x95/0xb8 Oct 19 23:43:58 TESTING kernel: [<ffffffff80073b7f>] start_secondary+0x45a/0x469 Oct 19 23:43:58 TESTING kernel: Oct 19 23:43:58 TESTING kernel: handlers: Oct 19 23:43:58 TESTING kernel: [<ffffffff801d1ff1>] (usb_hcd_irq+0x0/0x55) Oct 19 23:43:59 TESTING kernel: Disabling IRQ #169 lspci gives: 00:00.0 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a1) 00:01.0 ISA bridge: nVidia Corporation MCP61 LPC Bridge (rev a2) 00:01.1 SMBus: nVidia Corporation MCP61 SMBus (rev a2) 00:01.2 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a2) 00:02.0 USB Controller: nVidia Corporation MCP61 USB Controller (rev a3) 00:02.1 USB Controller: nVidia Corporation MCP61 USB Controller (rev a3) 00:04.0 PCI bridge: nVidia Corporation MCP61 PCI bridge (rev a1) 00:05.0 Audio device: nVidia Corporation MCP61 High Definition Audio (rev a2) 00:06.0 IDE interface: nVidia Corporation MCP61 IDE (rev a2) 00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2) 00:08.0 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2) 00:08.1 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2) 00:0d.0 VGA compatible controller: nVidia Corporation GeForce 6100 nForce 430 (rev a2) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:0e.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link) ~