uhub7: port 4 reset failed and uhub7: device problem, disabling port 2

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

My system's USB frequently partly fails. dmesg reports a lot of

uhub7: port 4 reset failed

My dmesg buffer has been overwritten with 1205 of these lines, plus a 
few of:

uhub7: device problem, disabling port 4
uhub7: device problem, disabling port 2
uhub7: device problem, disabling port 2
uhub7: device problem, disabling port 2
uhub7: device problem, disabling port 2

This causes it to stop recognizing some devices and my umass device on 
uhub7 stops working. Some USB devices continue to work though. Sometimes 
moving a device and a reboot fixes it. Also sometimes the X starts up 
with different resolution -- somehow it detects the hardware different 
boot to boot (I need to look into that further by comparing the X logs).

I looked at src/sys/dev/usb/usb_subr.c.  I don't have kernel built with 
debugging. What types of problems could cause this? Could it be bad 
devices plugged into it?

Here is what I have:

tx:reed$ sudo usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb2:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 addr 2: high speed, power 98 mA, config 1, CNF7051(0xb070), 
Chicony Electronics Co., Ltd.(0x04f2), rev 8.34, serial SN0001
 port 3 powered
 port 4 powered
Controller /dev/usb3:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb4:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb5:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb6:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 powered
 port 2 powered
Controller /dev/usb7:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), 
vendor 0x8086(0x8086), rev 1.00
 port 1 addr 2: high speed, power 300 mA, config 1, Wireless-G USB 
Network Adapter(0x000d), Cisco-Linksys(0x13b1), rev 0.04
 port 2 powered
 port 3 addr 3: high speed, self powered, config 1, HL-5150D(0x0022), 
Brother(0x04f9), rev 1.00, serial E5J858180
 port 4 powered
 port 5 powered
 port 6 powered
 port 7 powered
 port 8 powered


(That reminds me, I need to see if that builtin wireless is supported.)

Part of the dmesg is below. Complete dmesg is at
http://71.252.138.179:17777/dmesg.boot

SMBIOS rev. 2.4 @ 0xe8130 (35 entries)
TOSHIBA Satellite Pro L350 (PSLD9U-008007)
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
uhci0 at pci0 dev 26 function 0: vendor 0x8086 product 0x2937 (rev. 
0x03)
uhci0: interrupting at ioapic0 pin 16
usb0 at uhci0: USB revision 1.0
uhci1 at pci0 dev 26 function 1: vendor 0x8086 product 0x2938 (rev. 
0x03)
uhci1: interrupting at ioapic0 pin 21
usb1 at uhci1: USB revision 1.0
ehci0 at pci0 dev 26 function 7: vendor 0x8086 product 0x293c (rev. 
0x03)
ehci0: interrupting at ioapic0 pin 19
ehci0: BIOS refuses to give up ownership, using force
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1
usb2 at ehci0: USB revision 2.0
uhci2 at pci0 dev 29 function 0: vendor 0x8086 product 0x2934 (rev. 
0x03)
uhci2: interrupting at ioapic0 pin 23
usb3 at uhci2: USB revision 1.0
uhci3 at pci0 dev 29 function 1: vendor 0x8086 product 0x2935 (rev. 
0x03)
uhci3: interrupting at ioapic0 pin 19
usb4 at uhci3: USB revision 1.0
uhci4 at pci0 dev 29 function 2: vendor 0x8086 product 0x2936 (rev. 
0x03)
uhci4: interrupting at ioapic0 pin 16
usb5 at uhci4: USB revision 1.0
uhci5 at pci0 dev 29 function 3: vendor 0x8086 product 0x2939 (rev. 
0x03)
uhci5: interrupting at ioapic0 pin 18
usb6 at uhci5: USB revision 1.0
ehci1 at pci0 dev 29 function 7: vendor 0x8086 product 0x293a (rev. 
0x03)
ehci1: interrupting at ioapic0 pin 23
ehci1: BIOS refuses to give up ownership, using force
ehci1: EHCI version 1.0
ehci1: companion controllers, 2 ports each: uhci2 uhci3 uhci4 uhci5
usb7 at ehci1: USB revision 2.0
uhub0 at usb0: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1 at usb1: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub1: 2 ports with 2 removable, self powered
uhub2 at usb2: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, 
addr 1
uhub2: 4 ports with 4 removable, self powered
uhub3 at usb3: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub3: 2 ports with 2 removable, self powered
uhub4 at usb4: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub4: 2 ports with 2 removable, self powered
uhub5 at usb5: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub5: 2 ports with 2 removable, self powered
uhub6 at usb6: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, 
addr 1
uhub6: 2 ports with 2 removable, self powered
uhub7 at usb7: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, 
addr 1
uhub7: 8 ports with 8 removable, self powered
ral0 at uhub7 port 1
ral0: Cisco-Linksys Wireless-G USB Network Adapter, rev 2.00/0.04, addr 
2
ral0: MAC/BBP RT2570 (rev 0x03), RF RT2526
ral0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ral0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 
24Mbps 36Mbps 48Mbps 54Mbps
uvideo0 at uhub2 port 2 configuration 1 interface 0: Chicony Electronics 
Co., Ltd. CNF7051, rev 2.00/8.34, addr 2
video0 at uvideo0: Chicony Electronics Co., Ltd. CNF7051, rev 2.00/8.34, 
addr 2
ulpt0 at uhub7 port 3 configuration 1 interface 0
ulpt0: Brother HL-5150D, rev 2.00/1.00, addr 3, iclass 7/1
ulpt0: using bi-directional mode
uhub7: port 4 reset failed
uhub7: port 4 reset failed
uhub7: port 4 reset failed
uhub7: port 4 reset failed
uhub7: port 4 reset failed