Re: usb-next EHCI improvements success report

2012-07-17 Thread Alan Stern
On Tue, 17 Jul 2012, Daniel Drake wrote: > Hi Alan, > > I've been investigating a problem with UVC webcams on the XO-1 laptop > (CS5536 EHCI). > > Running webcam apps, especially guvcview, was killing the entire USB > bus more often than not ("failed EHCI handshake, HC died, giving up" > or simi

usb-next EHCI improvements success report

2012-07-17 Thread Daniel Drake
Hi Alan, I've been investigating a problem with UVC webcams on the XO-1 laptop (CS5536 EHCI). Running webcam apps, especially guvcview, was killing the entire USB bus more often than not ("failed EHCI handshake, HC died, giving up" or similar). Reproduced on 3.5-rc7 and throughout various old ker