[A, Snipped from a mail to the BlueZ ppl. B, CC:ed since the last post on USB was in the year 2000] What the bluez developer gathered: This looks really like an ohci_hcd problem with interrupt URBs. Controllers and drivers: ehci_hcd 0000:00:02.2: nVidia Corporation nForce2 USB Controller ehci_hcd 0000:00:02.2: irq 193, pci mem f8814000 ehci_hcd 0000:00:02.2: new USB bus registered, assigned bus number 1 ehci_hcd 0000:00:02.2: USB 2.0 enabled, EHCI 1.00, driver 2004-May-10 ohci_hcd: 2004 Feb 02 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) ohci_hcd 0000:00:02.0: nVidia Corporation nForce2 USB Controller ohci_hcd 0000:00:02.0: irq 177, pci mem f8816000 ohci_hcd 0000:00:02.0: new USB bus registered, assigned bus number 2 ohci_hcd 0000:00:02.1: nVidia Corporation nForce2 USB Controller (#2) ohci_hcd 0000:00:02.1: irq 185, pci mem f8818000 ohci_hcd 0000:00:02.1: new USB bus registered, assigned bus number 3 And the final error when inserting a USB BT dongle: usb 1-3.4: new full speed USB device using address 12 ehci_hcd 0000:00:02.2: qh f7e54680 (#0) state 1 hci_usb_intr_rx_submit: hci0 intr rx submit failed urb f7b81274 err -28 from proc/interrupts: 177: 0 IO-APIC-level ohci_hcd 185: 0 IO-APIC-level ohci_hcd 193: 24812 IO-APIC-level ehci_hcd CC: Since i'm not subbed to either ml. Some snipped parts from the original mail. --- Since some kernel version i can't exactly remember which, i have been unable to use usb, i have tested with with 2.6.8 -> 2.6.9-rc2-bk7 and i also applied your patches for 2.6.8. I have 2 usb dongles, one old that did work once, and one new that seems to be working like the older but it doesn't work with linux. Output from hciconfig: hci0: Type: USB BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:0 acl:0 sco:0 events:0 errors:0 TX bytes:0 acl:0 sco:0 commands:0 errors:0 Basically, it just stopped working and i dunno why, any clues? at all? -- Ian Kumlien -- http://pomac.netswarm.net