Re: System suspend question
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 23 Oct 2007, Sarah Sharp wrote: > Does a usb driver's suspend function get called during system suspend? Yes. > From the dmesg output prior to a suspend-to-disk, it looks like the > disconnect function is called instead. However, the documentation for > usb_external_suspend_device in usb/core/driver.c says that this function > handles external suspend requests from the "PM core (system sleep)". What you see in the dmesg log is because the userspace utility you use to do a system suspend starts by unloading the USB host controller drivers. This was common in the past because USB used to have significant problems with suspend -- some USB drivers probably still do! Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel