Bug#454797: linux-image-2.6.22-3-686: USB 2.0 hub can't handle more than one full speed device
On Fri, Dec 07, 2007 at 11:41:24PM +0100, Piotr Roszatycki wrote:
> USB devices connected to external hub for USB 2.0 doesn't work
> correctly if one of these devices utilises bandwith.
> It is a problem for USB audio devices. If such device is working, no
> more devices can work, i.e. another USB audio or camera. The dmesg
> output is:
> cannot submit datapipe for urb 1, error -28: not enough bandwidth
> The solution is to use improved Transaction Translator scheduling
> I've tested CONFIG_USB_EHCI_TT_NEWSCHED with the latest Sid kernel and
> it works correctly.
seen on fedora too.
set in trunk for upcoming 2.6.24
thanks for feedback.
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