Re: autosuspend default
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Mon, 19 Mar 2007, Oliver Neukum wrote: > Am Montag, 19. März 2007 17:21 schrieb Alan Stern: > > On Mon, 19 Mar 2007, Oliver Neukum wrote: > > > > > Hi, > > > > > > I got another bug report about a scanner disconnecting when > > > suspended. Could we introduce a setting for deciding whether > > > unbound devices should by default be subject to autosuspend? > > > > That's what the new quirks are for. Besides, what's wrong with having an > > unbound device disconnect? Doesn't it reconnect when the port is resumed? > > http://bugzilla.kernel.org/show_bug.cgi?id=8231 > > It seems a good idea to me to limit right now, the basically meaningless > bug reports to make a better signal/noise ratio and find problems with the > code as opposed to devices. Judging from the bug report, it sounds like a problem with the userspace tools -- apparently either scanimage or sane exits before the scanner is ready. Or maybe the problem lies in the scanner itself; it can't finish its reset procedure after scanning if the USB interface is suspended. With a 2.6.21 kernel, the user could simply set the power/autosuspend attribute to 900 (15 minutes). This could be put in a hotplug or udev script. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel