Starting today, I noticed a few problems with my system. USB devices, including the internal ones such as microphones, don't seem to be working at all. I first noticed when my keyboard and mouse weren't responding - however, checking dmesg, both the logitech unifying receiver and my external mics usb connections where being recognized.
Thinking at first that the receiver may have simply stopped recognizing the input devices, I figured I'd resync them and I'd be good to go - except, that when I went to reference the needed hidraw device, I didn't have any. There is no dev/hidraw, no sys/class/hidraw, no anything it seems. (except a hidraw header under usr/include and some hidraw files under usr/src)
So that /seems/ to be at least part of the problem - udev seems to be failing to do its job somewhere. But I've got no idea where to go next.
Here's relevant bits that might be useful:
[ 178.045682] usb 3-4: SerialNumber: 201203 [ 970.636450] usb 1-1.2: new full-speed USB device number 5 using ehci_hcd [ 970.731693] usb 1-1.2: New USB device found, idVendor=046d, idProduct=c52b [ 970.731698] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 970.731701] usb 1-1.2: Product: USB Receiver [ 970.731704] usb 1-1.2: Manufacturer: Logitech
Bus 001 Device 005: ID 046d:c52b Logitech, Inc. Unifying Receiver
From the udev monitor (udevadm monitor):
KERNEL[1111.431718] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 (usb) KERNEL[1111.432374] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb) KERNEL[1111.432430] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.1 (usb) KERNEL[1111.432495] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.2 (usb) UDEV [1111.438072] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 (usb) UDEV [1111.441642] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb) UDEV [1111.442308] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.1 (usb) UDEV [1111.442924] add /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.2 (usb)