This bug occurs when a PCB module that provides the following internal
features:
* Generic 4 port Hub (Genesys GL850A) - problems with port 3!
=> Futaba "DM-140GINK Demo", (usbhid driver) - VFD (LCD) & Panel
Buttons
=> Ralink RT2571WF
This is all encased within the PCB, so there is no extra access to the
hub.
When the devices is connected:
[ 699.188000] usb 4-8: new high speed USB device using ehci_hcd and
address 39
[ 699.320000] usb 4-8: configuration #1 chosen from 1 choice
[ 699.320000] hub 4-8:1.0: USB hub found
[ 699.320000] hub 4-8:1.0: 4 ports detected
[ 699.624000] usb 4-8.1: new high speed USB device using ehci_hcd and
address 40
[ 699.852000] usb 4-8.1: configuration #1 chosen from 1 choice
[ 700.056000] usb 4-8.2: new full speed USB device using ehci_hcd and
address 41
[ 700.152000] usb 4-8.2: configuration #1 chosen from 1 choice
[ 700.152000] hiddev96: USB HID v1.10 Device [DM-140GINK Demo
DM-140GINK Demo] on usb-0000:00:13.5-8.2
[ 700.156000] input: DM-140GINK Demo DM-140GINK Demo
as /class/input/input7
[ 700.156000] input: USB HID v1.10 Device [DM-140GINK Demo DM-140GINK
Demo] on usb-0000:00:13.5-8.2
[ 701.116000] hub 4-8:1.0: Cannot enable port 3. Maybe the USB cable
is bad?
[ 701.948000] hub 4-8:1.0: Cannot enable port 3. Maybe the USB cable
is bad?
[ 702.780000] hub 4-8:1.0: Cannot enable port 3. Maybe the USB cable
is bad?
...(continues)
[ 549.984000] usb 6-8.2: reset full speed USB device using ehci_hcd
and address
I believe this bug may be caused due to USB standard not being followed
on the hardware. This usb module does work under Windows but complains
of an extra "Unknown Device" (that doesn't really exist).
When this device is connected, 'lsusb' no longer functions. This bug is
in kernel's as recent as 2.6.22.
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