Lately (last month or so) I've noticed that whenever hotplug pays attention to the USB bus on my PowerBook G4, usb.agent says "usbcore: blacklisted" several times. Restarting hotplug via /etc/init.d/hotplug results in the following sent to syslog:
May 13 01:21:01 sting kernel: usb.c: USB disconnect on device 10:18.0-0 address 1 May 13 01:21:01 sting kernel: usb.c: USB bus 1 deregistered May 13 01:21:01 sting kernel: usb.c: USB disconnect on device 10:19.0-0 address 1 May 13 01:21:01 sting kernel: usb.c: USB bus 2 deregistered May 13 01:21:02 sting kernel: usb.c: deregistering driver usb-storage May 13 01:21:02 sting kernel: scsi : 1 host left. May 13 01:21:02 sting kernel: PCI: Enabling bus mastering for device 10:18.0 May 13 01:21:02 sting kernel: usb-ohci.c: USB OHCI at membase 0xe3025000, IRQ 27 May 13 01:21:02 sting kernel: usb-ohci.c: usb-10:18.0, Apple Computer Inc. KeyLargo USB May 13 01:21:02 sting kernel: usb.c: new USB bus registered, assigned bus number 1 May 13 01:21:02 sting kernel: hub.c: USB hub found May 13 01:21:02 sting kernel: hub.c: 2 ports detected May 13 01:21:02 sting kernel: PCI: Enabling bus mastering for device 10:19.0 May 13 01:21:02 sting kernel: usb-ohci.c: USB OHCI at membase 0xe3027000, IRQ 28 May 13 01:21:02 sting kernel: usb-ohci.c: usb-10:19.0, Apple Computer Inc. KeyLargo USB (#2) May 13 01:21:02 sting kernel: usb.c: new USB bus registered, assigned bus number 2 May 13 01:21:02 sting kernel: hub.c: USB hub found May 13 01:21:02 sting kernel: hub.c: 2 ports detected May 13 01:21:06 sting usb.agent[18744]: usbcore: blacklisted May 13 01:21:06 sting usb.agent[18754]: usbcore: blacklisted May 13 01:21:07 sting usb.agent[18773]: usbcore: blacklisted May 13 01:21:10 sting usb.agent[18846]: usbcore: blacklisted Any ideas what might be causing this? USB still works just fine. I have not done anything with the kernel; only an 'apt-get upgrade' or two. I've searched around via Google and can't come up with much to explain this. Paul
