Same / Similar issue - USB was working (Flash drives and USB Canon i965 printer) & then stopped working... Found turning off ehci allowed both to work....
cd /sys/bus/pci/drivers/ehci_hcd/ sudo sh -c 'find ./ -name "0000:00:*" -print| sed "s/\.\///">unbind' (echos unbind to the ehci device id) lots of 'unable to enumerate' messages in dmesg; [ 1744.750662] usb 1-1: new high speed USB device using ehci_hcd and address 42 [ 1744.880420] usb 1-1: device descriptor read/64, error -71 [ 1745.120056] usb 1-1: device descriptor read/64, error -71 [ 1745.350173] usb 1-1: new high speed USB device using ehci_hcd and address 43 [ 1745.480055] usb 1-1: device descriptor read/64, error -71 [ 1745.723513] usb 1-1: device descriptor read/64, error -71 [ 1745.950062] usb 1-1: new high speed USB device using ehci_hcd and address 44 [ 1746.370083] usb 1-1: device not accepting address 44, error -71 [ 1746.490094] usb 1-1: new high speed USB device using ehci_hcd and address 45 [ 1746.910045] usb 1-1: device not accepting address 45, error -71 [ 1747.030065] usb 1-2: new high speed USB device using ehci_hcd and address 46 [ 1747.160070] usb 1-2: device descriptor read/64, error -71 [ 1747.407157] usb 1-2: device descriptor read/64, error -71 [ 1747.630059] usb 1-2: new high speed USB device using ehci_hcd and address 47 [ 1747.760053] usb 1-2: device descriptor read/64, error -71 [ 1748.000055] usb 1-2: device descriptor read/64, error -71 [ 1748.230102] usb 1-2: new high speed USB device using ehci_hcd and address 48 [ 1748.650063] usb 1-2: device not accepting address 48, error -71 [ 1748.770060] usb 1-2: new high speed USB device using ehci_hcd and address 49 [ 1749.190037] usb 1-2: device not accepting address 49, error -71 [ 1749.190074] hub 1-0:1.0: unable to enumerate USB device on port 2 [ 1749.370122] usb 1-3: new high speed USB device using ehci_hcd and address 50 [ 1749.500063] usb 1-3: device descriptor read/64, error -71 [ 1749.740065] usb 1-3: device descriptor read/64, error -71 [ 1749.973733] usb 1-3: new high speed USB device using ehci_hcd and address 51 [ 1750.100057] usb 1-3: device descriptor read/64, error -71 [ 1750.340061] usb 1-3: device descriptor read/64, error -71 [ 1750.570103] usb 1-3: new high speed USB device using ehci_hcd and address 52 [ 1750.990070] usb 1-3: device not accepting address 52, error -71 [ 1751.110118] usb 1-3: new high speed USB device using ehci_hcd and address 53 [ 1751.531122] usb 1-3: device not accepting address 53, error -71 [ 1751.531520] hub 1-0:1.0: unable to enumerate USB device on port 3 [ 1751.710204] usb 1-4: new high speed USB device using ehci_hcd and address 54 [ 1751.843296] usb 1-4: device descriptor read/64, error -71 [ 1752.090084] usb 1-4: device descriptor read/64, error -71 [ 1752.320105] usb 1-4: new high speed USB device using ehci_hcd and address 55 [ 1752.460086] usb 1-4: device descriptor read/64, error -71 [ 1752.690515] usb 1-4: device descriptor read/64, error -71 [ 1752.920088] usb 1-4: new high speed USB device using ehci_hcd and address 56 [ 1753.340041] usb 1-4: device not accepting address 56, error -71 [ 1753.460069] usb 1-4: new high speed USB device using ehci_hcd and address 57 [ 1753.880039] usb 1-4: device not accepting address 57, error -71 [ 1753.880078] hub 1-0:1.0: unable to enumerate USB device on port 4 uname -a: Linux fitsserver 2.6.32-24-server #38-Ubuntu SMP Mon Jul 5 10:29:32 UTC 2010 x86_64 GNU/Linux Intel atom Dual core David -- USB HDD and Flash Drives no longer recognized https://bugs.launchpad.net/bugs/645211 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
