I tried to rebuild 2.6.32 kernel, I found the new kernel usb connection is not stable, it often loses connection. I have a previous kernel, it has no problem. But I don’t have its configuration file. I don’t know if someone happens to have same issue.
[ 827.942138] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 29
[ 827.942260] ehci-omap ehci-omap.0: detected XactErr len 0/18944 retry 27
[ 827.942260] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 30
[ 827.942382] ehci-omap ehci-omap.0: detected XactErr len 0/18944 retry 28
[ 827.942382] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 31
[ 827.942504] ehci-omap ehci-omap.0: detected XactErr len 0/18944 retry 29
[ 827.942504] ehci-omap ehci-omap.0: devpath 2 ep0in 3strikes
[ 827.942596] hub 2-2:1.0: hub_port_status failed (err = -71)
[ 827.942596] hub 2-2:1.0: connect-debounce failed, port 5 disabled
[ 827.942626] ehci-omap ehci-omap.0: detected XactErr len 0/18944 retry 30
[ 827.942626] hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0004
[ 827.942687] ehci-omap ehci-omap.0: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT
[ 827.942687] hub 2-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
[ 827.942718] usb 2-2: USB disconnect, address 2
[ 827.942718] usb 2-2.1: USB disconnect, address 3
[ 827.942718] usb 2-2.1: unregistering device
[ 827.942718] usb 2-2.1: usb_disable_device nuking all URBs
[ 827.942749] ehci-omap ehci-omap.0: detected XactErr len 0/18944 retry 31
[ 827.942779] ehci-omap ehci-omap.0: shutdown urb c738fb40 ep1in-bulk
[ 827.942932] usb 2-2.1: unlink qh8-0001/c7bb59c0 start 3 [1/0 us]
[ 827.943023] ehci-omap ehci-omap.0: shutdown urb c7b0b0c0 ep3in-intr
[ 827.943023] usb 2-2.1: unregistering interface 2-2.1:1.0
[ 827.943176] usb0: unregister ‘smsc95xx’ usb-ehci-omap.0-2.1, smsc95xx USB 2.0 Ethernet
[ 828.080627] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 1
[ 829.356262] ehci-omap ehci-omap.0: detected XactErr len 0/1 retry 9
[ 829.356292] usb 2-2.3: unlink qh128-0e01/c7258bc0 start 2 [1/2 us]
[ 829.381683] usb 2-2: clear tt 3 (9051) error -19
[ 829.390838] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 1
[ 829.400543] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 2
[ 829.410095] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 3
[ 829.419586] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 4
[ 829.429077] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 5
[ 829.438598] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 6
[ 829.448089] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 7
[ 829.457580] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 8
[ 829.467071] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 9
[ 829.476562] usb 2-2.1:1.0: uevent
[ 829.482757] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 10
[ 829.492462] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 11
[ 829.502105] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 12
[ 829.511718] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 13
[ 829.521331] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 14
[ 829.530944] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 15
[ 829.540588] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 16
[ 829.550201] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 17
[ 829.559844] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 18
[ 829.569335] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 19
[ 829.578826] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 20
[ 829.588317] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 21
[ 829.597839] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 22
[ 829.607330] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 23
[ 829.616821] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 24
[ 829.626342] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 25
[ 829.635833] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 26
[ 829.645202] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 27
[ 829.654571] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 28
[ 829.663818] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 29
[ 829.673065] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 30
[ 829.682189] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 31
[ 829.691192] ehci-omap ehci-omap.0: devpath 2.3 ep1in 3strikes
[ 829.699157] usb 2-2: clear tt buffer port 3, a5 ep1 t05ea8148
[ 829.707275] usb 2-2: clear tt 3 (9051) error -19
[ 829.718109] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 1
[ 829.727142] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 2
[ 829.736083] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 3
[ 829.744964] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 4
[ 829.753692] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 5
[ 829.762451] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 6
[ 829.771087] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 7
[ 829.779571] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 8
[ 829.787963] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 9
[ 829.796203] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 10
[ 829.804565] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 11
[ 829.812957] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 12
[ 829.821197] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 13
[ 829.829315] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 14
[ 829.837463] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 15
[ 829.845581] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 16
[ 829.853698] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 17
[ 829.861816] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 18
[ 829.869934] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 19
[ 829.878082] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 20
[ 829.886199] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 21
[ 829.894317] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 22
[ 829.902465] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 23
[ 829.910461] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 24
[ 829.918457] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 25
[ 829.926452] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 26
[ 829.934448] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 27
[ 829.942443] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 28
[ 829.950317] ehci-omap ehci-omap.0: detected XactErr len 0/1 retry 10
[ 829.958007] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 29
[ 829.965942] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 30
[ 829.973876] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 31
[ 829.981811] ehci-omap ehci-omap.0: devpath 2.3 ep1in 3strikes
[ 829.988891] usb 2-2: clear tt buffer port 3, a5 ep1 t05ea8148
[ 829.996124] usb 2-2: clear tt 3 (9051) error -19
[ 830.002197] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 1
[ 830.010345] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 2
[ 830.018463] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 3
[ 830.026580] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 4
[ 830.034698] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 5
[ 830.042938] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 6
[ 830.051147] usb 2-2.1: uevent
[ 830.055664] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 7
[ 830.063964] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 8
[ 830.072326] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 9
[ 830.080566] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 10
[ 830.088958] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 11
[ 830.097198] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 12
[ 830.105316] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 13
[ 830.113433] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 14
[ 830.121551] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 15
[ 830.129699] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 16
[ 830.137817] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 17
[ 830.145935] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 18
[ 830.154052] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 19
[ 830.162200] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 20
[ 830.170318] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 21
[ 830.178436] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 22
[ 830.186553] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 23
[ 830.194702] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 24
[ 830.202819] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 25
[ 830.210937] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 26
[ 830.219055] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 27
[ 830.227172] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 28
[ 830.235321] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 29
[ 830.243438] ehci-omap ehci-omap.0: detected XactErr len 0/1514 retry 30
[ 830.243499] usb 2-2.3: USB disconnect, address 5
[ 830.243499] usb 2-2.3: unregistering device
[ 830.243530] usb 2-2.3: usb_disable_device nuking all URBs
[ 830.243560] ehci-omap ehci-omap.0: shutdown urb c738f440 ep1in-bulk
[ 830.243591] usb 2-2.3: unregistering interface 2-2.3:1.0
[ 830.243682] eth0: unregister ‘cdc_ether’ usb-ehci-omap.0-2.3, CDC Ethernet Device
[ 830.494689] usb 2-2.3:1.0: uevent
[ 830.500396] usb 2-2.3: unregistering interface 2-2.3:1.1
[ 830.508270] usb 2-2.3:1.1: uevent
[ 830.516326] usb 2-2.3: uevent
[ 830.521972] usb 2-2: unregistering device
[ 830.528381] usb 2-2: usb_disable_device nuking all URBs
[ 830.535949] usb 2-2: unlink qh256-0001/c7b0fbc0 start 1 [1/0 us]
[ 830.544250] ehci-omap ehci-omap.0: shutdown urb c7b0b840 ep1in-intr
[ 830.553100] usb 2-2: unregistering interface 2-2:1.0
[ 830.565063] usb 2-2:1.0: uevent
[ 830.582458] usb 2-2: uevent
[ 830.744689] hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501
[ 830.815093] ehci-omap ehci-omap.0: port 2 full speed → companion
[ 830.823699] ehci-omap ehci-omap.0: GetStatus port 2 status 003001 POWER OWNER sig=se0 CONNECT
[ 830.835021] hub 2-0:1.0: port 2 not reset yet, waiting 50ms
[ 830.901031] ehci-omap ehci-omap.0: GetStatus port 2 status 003002 POWER OWNER sig=se0 CSC
[ 830.912170] hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0004