SZÉKELYI Szabolcs wrote:
Hi,
I have a USB 2.0 device (namely a Creative X-Fi Surround 5.1 sound card) that's
recognized as a 1.1 device thus running at only 12Mbps. The trouble is that even
stereo audio is crispy this way, running it at high speed may solve it. I've
seen messages in the kernel log like
I hope you are attaching your device to 2.0 port.
As long as I know, if device will work as high speed or full speed is
decided at bus enumeration time.
So, if you know using usbmon logs, that can help...
[ 117.410000] cannot submit datapipe for urb 0, error -28: not enough bandwidth
Any other messages in dmesg ?
coming from the snd-usb-audio module. I guess it's the USB framework that is
responsible for determining the speed for a given device, since -- according to
the kernel log -- the speed is known even before the appropriate driver (this
time snd-usb-audio) is loaded.
So my question is: what should I do or change in the kernel source to force the
USB framework to recognize this device as a high speed one?
what kernel? what distribution? This data equally matters along with logs.
Sorry if this is a
dumb question or it has been answered before, feel free to suggest pointers.
Thanks,
Thanks,
Viral Mehta,
Embedded Software Engineer,
Tel. No. 91 79 26563705, Ext. 423
www.einfochips.com <http://www.einfochips.com>
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