On Thu, 2005-09-15 at 14:13 +0200, Clemens Ladisch wrote: > Horms wrote: > > On Wed, Sep 14, 2005 at 03:29:13PM +0200, Daniel Svensson wrote: > > > CONFIG_USB_BANDWIDTH is enabled by default in the debian kernel. Could > > > this be changed? According to the alsa developer who helped me debug the > > > problem with my usb soundcard CONFIG_USB_BANDWIDTH should be disabled. > > > The original email is forwarded here: > > > > That sounds fair enough to me, as long there are no objections > > from the rest of the kernel-team. > > > > Clemens, could you provide a little more information on > > the problems that CONFIG_USB_BANDWIDTH causes? > > The code that implements it computes wrong values for the bandwidth > utilization. This doesn't seem to matter much for full speed stereo > devices, but we have several bug reports for multichannel and/or high > speed devices where usb_submit_urb() incorrectly returns -ENOSPC > errors. > > The comment above the usb_check_bandwidth() function in hcd.c lists > several of the known bugs. > > Perhaps CONFIG_USB_BANDWIDTH should have been marked BROKEN instead of > just EXPERIMENTAL.
Has this been reported upstream? Possibly the USB maintainers don't know that this is causing real problems for users. Lee -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
