FC-5 has shipped and I get all sorts of interesting bugs. Here's one...
 https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=187244
Apparently, nothing works through a hub, system keeps cycling and
resetting.

Mar 29 16:57:50 localhost kernel: usb 3-3.2: USB disconnect, address 10
Mar 29 16:57:51 localhost kernel: usb 3-3.2: new low speed USB device using
ehci_hcd and address 11
Mar 29 16:57:51 localhost kernel: usb 3-3.2: configuration #1 chosen from 1 
choice
Mar 29 16:57:51 localhost kernel: input: Dell Dell USB Keyboard as
/class/input/input3452
Mar 29 16:57:51 localhost kernel: input: USB HID v1.10 Keyboard [Dell Dell USB
Keyboard] on usb-0000:00:03.2-3.2
Mar 29 16:57:51 localhost kernel: drivers/usb/input/hid-core.c: input irq status
-71 received
Mar 29 16:57:51 localhost last message repeated 3 times
Mar 29 16:57:51 localhost kernel: usb 3-3.2: USB disconnect, address 11
Mar 29 16:57:51 localhost kernel: usb 3-3.2: new low speed USB device using
ehci_hcd and address 12

And so on and so forth. This is far from the only instance of such
symptoms. I think that possibly a few 2.0 hubs had TT terminally broken.
What is the best way to disable TT per-device or system-wide?
The way ehci-q.c handles it does not seem to have any obvious knob.

-- Pete


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