Re: usb suspend backtraces.
Dave Jones <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Sun, Jul 15, 2007 at 08:07:01PM -0700, David Brownell wrote: > On Sunday 15 July 2007, Dave Jones wrote: > > > Before I dig deeper, are there other side-effects of changing > > this default ? > > Other than spending more power than necessary? :) > > I don't think there should be, but Alan's most on top of these > particular issues. The main thing I'd worry about is root hubs, > which may be performing undesirable periodic DMAs (1/msec or more > often) if they aren't allowed to suspend their downstream links. > (Called, misleadingly, "global" suspend even though it's limited > to a single USB bus.) Would this be any different from the status quo of having CONFIG_USB_SUSPEND not set though ? We've had this disabled until now, without notable bad effects (or at least, nothing that we've attributed to having this off). > I think we've been finding out a consequence of Microsoft's rarely > using the USB suspend mode: devices don't get tested with it, so > many of them don't support it correctly. I'm shocked ;-) Dave -- http://www.codemonkey.org.uk ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel