Some race during coldplug prevents USB controllers modules from being loaded, they can't find some usbcore symbols at loading time.
The suggested patches have been applied upstream, so we already have them in the distro. The loop checking module loading status in /proc/modules should have been enough, need to investigate more.
Debian lowered the bug importance not to block their final release, and the bug was eventually marked as fixed later, without valuable explanation.
Trying rmmod ehci_hcd; rmmod uhci_hcd; umount /proc/bus/usb; rmmod usbcore; udevtrigger; grep usb /proc/modules to reproduce isn't enough, the bug probably appears only when the system is overloaded.
Linux agpgart interface v0.102 (c) Dave Jones usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub iTCO_vendor_support: vendor-support=0 usbcore: registered new device driver usb agpgart: Detected an Intel 915GM Chipset. agpgart: Detected 7932K stolen memory. agpgart: AGP aperture is 256M @ 0xc0000000 iTCO_wdt: Intel TCO WatchDog Timer Driver v1.01 (21-Jan-2007) iTCO_wdt: Found a ICH6-M TCO device (Version=2, TCOBASE=0x1060) iTCO_wdt: initialized. heartbeat=30 sec (nowayout=1) uhci_hcd: Unknown symbol usb_hcd_pci_suspend uhci_hcd: Unknown symbol usb_hcd_resume_root_hub uhci_hcd: Unknown symbol usb_hcd_pci_probe uhci_hcd: Unknown symbol usb_disabled uhci_hcd: Unknown symbol usb_calc_bus_time uhci_hcd: Unknown symbol usb_hcd_pci_resume uhci_hcd: Unknown symbol usb_hcd_giveback_urb uhci_hcd: Unknown symbol usb_hcd_poll_rh_status uhci_hcd: Unknown symbol usb_hcd_pci_remove uhci_hcd: Unknown symbol usb_root_hub_lost_power ACPI: PCI Interrupt 0000:00:1f.3[B] -> GSI 17 (level, low) -> IRQ 17 USB Universal Host Controller Interface driver v3.0 ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 16 PCI: Setting latency timer of device 0000:00:1d.0 to 64 uhci_hcd 0000:00:1d.0: UHCI Host Controller uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1 uhci_hcd 0000:00:1d.0: irq 16, io base 0x0000bf80 usb usb1: configuration [#1 http://qa.mandriva.com/show_bug.cgi?id=1] chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 17 (level, low) -> IRQ 17 PCI: Setting latency timer of device 0000:00:1d.1 to 64 uhci_hcd 0000:00:1d.1: UHCI Host Controller uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2 uhci_hcd 0000:00:1d.1: irq 17, io base 0x0000bf60 usb usb2: configuration [#1 http://qa.mandriva.com/show_bug.cgi?id=1] chosen from 1 choice hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18 PCI: Setting latency timer of device 0000:00:1d.2 to 64 uhci_hcd 0000:00:1d.2: UHCI Host Controller uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3 uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000bf40 usb usb3: configuration [#1 http://qa.mandriva.com/show_bug.cgi?id=1] chosen from 1 choice hub 3-0:1.0: USB hub found hub 3-0:1.0: 2 ports detected intel_rng: FWH not detected $ grep usb_hcd_pci_suspend /lib/modules/2.6.22-4mdv/modules.symbols alias symbol:usb_hcd_pci_suspend usbcore
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