Hi,
Since about 2.4.21 I've been getting random and intermintent usb modem disconnects, condition is more frequent with the EHCI module loaded and/or when my usb speakers are on, dmesg with usb-ohci.c debugging enabled and system logs are from 2.4.25-pre8 kernel. Thanks.
Can you reproduce this on 2.6? If so, see the patch I just posted to linux-usb-devel. It helped get rid of this error in one system, from some otherwise idle controllers:
usb-ohci.c: OHCI Unrecoverable Error,controller usb-00:0c.0 disabled
On that system, DMA doesn't seem to be quite as robust as it should be. So that patch improves things by eliminating a once-per-millisecond DMA from each OHCI controller, unless it's actually needed.
- Dave
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