Re: autosuspend for hid
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Wednesday 16 May 2007, Oliver Neukum wrote: > Am Mittwoch, 16. Mai 2007 11:40 schrieb Robert Marquardt: > > A suspended bus-powered USB device cannot drive LEDs so suspending an > > USB keyboard with CAPS LOCK on means it gets out of sync. > > How much power does an LED need? You have 2mA in suspended mode. Correction: more like 0.5mA in suspended mode. For a high-power device, it can be more ... but most keyboards aren't. - Dave ------------------------------------------------------------------------- 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