Am Dienstag, 17. November 2009 16:04:14 schrieb Oliver Neukum: > Am Dienstag, 17. November 2009 12:11:39 schrieb Stephan Diestelhorst: > > Alan Stern wrote: > > > On Wed, 11 Nov 2009, Stephan Diestelhorst wrote: > > > > > > This issue is with the built-in Bison web cam in an MSI Wind > > > > > > U100. Once the camera is enabled (via hotkey), the entire USB > > > > > > subsystem is not responding anymore, causing non-detection of > > > > > > freshly attached USB devices and prevents suspending the box. > > > > > > > Several volunteers and me have experimented with the udelay values. > > See > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/435352/comments/167 > > > > It seems that a delay of 400 usec fixes the thing, and that we're > > nowhere near the requested 50 usecs. > > > > Seems like someone either adds the udelay(400) or introduces a proper > > fix (with timers). I am too inexperienced in USB things to fully > > understand the negative implications of the former or do the latter. > > as this affects only buggy chipsets, I'd prefer to just add the required > udelay conditional on a chipset quirk. Do you concur? Do you want me > to do it and close this bug? Thanks for looking into this Oliver! Have you had any chance to work on this, yet? Many thanks, Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
