Bug#454797: linux-image-2.6.22-3-686: USB 2.0 hub can't handle more than one full speed device
Package: linux-image-2.6.22-3-686
Version: 2.6.22-6
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
(CONFIG_USB_EHCI_TT_NEWSCHED).
I've tested CONFIG_USB_EHCI_TT_NEWSCHED with the latest Sid kernel and
it works correctly.
--
.''`. Piotr Roszatycki
: :' : mailto:Piotr.Roszatycki@gmail.com
`. `' mailto:dexter@debian.org
`-
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