I am trying to help v4mp <[email protected]> with a wireless problem.
He is running Ubuntu natty 3.0.4-030004-generic and get the following items in
his dmesg output:
[ 3.963920] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep
[ 3.970920] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep
[ 3.975037] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep
[ 3.976097] usb 3-2: ep 0x81 - rounding interval to 64 microframes, ep desc
says 80 microframes
[ 3.984899] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep
and later many of
[ 545.272708] xhci_hcd 0000:05:00.0: ERROR no room on ep ring
A nearly complete dmesg output is at http://pastebin.com/7tfcBfbD. I asked the
OP to paste the entire output, but he gave me what is posted there.
Is there a bug in the rtl8192cu USB handling that would let the device work with
ehci-hcd and ohci-hcd, but fail with xhci-hcd?
Would commit 44f4c3e (USB: xhci: Set change bit when warm reset change is set)
have any effect on this? I do not know if this is in 3.0.4.
I did not find any other recent commits that are aimed at xhci and looked as if
they might address this issue. Did I miss any?
Note: The Alfa device works fine on my system with only ohci and ehci controllers.
Thanks,
Larry