Re: Webcam stops other USB devices (ehci_hcd: HC died; cleaning up)

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Hi Alan,

On Thu, 2012-05-17 at 11:40 -0400, Alan Stern wrote:
> On Thu, 17 May 2012, Geoff Levand wrote:
> 
> > I could just do some quick tests but found that with DEBUG
> > defined and your change I see these with the port errors
> > continuing on indefinitely.
> > 
> > <7>usb 2-2: link qh0-00ff/c00000001bcbf480 start 0 [2/0 us]
> > <7>usb 1-1: unlink qh256-0001/c00000001d181d00 start 1 [1/0 us]
> 
> Those two lines look normal.
> 
> > <3>hub 3-0:1.0: connect-debounce failed, port 1 disabled
> > <3>hub 3-0:1.0: over-current condition on port 2
> > <4>hub 3-0:1.0: config error on port 2
> > <3>hub 3-0:1.0: connect-debounce failed, port 2 disabled
> > <7>ps3-ehci-driver sb_06: GetStatus port:1 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>ps3-ehci-driver sb_06: port 1 resume error -19
> > <7>ps3-ehci-driver sb_06: GetStatus port:1 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>hub 1-0:1.0: over-current condition on port 1
> > <3>ps3-ehci-driver sb_06: port 2 resume error -19
> > <7>ps3-ehci-driver sb_06: GetStatus port:2 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>ps3-ehci-driver sb_06: port 2 resume error -19
> > <7>ps3-ehci-driver sb_06: GetStatus port:2 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>hub 1-0:1.0: over-current condition on port 2
> > <7>ps3-ehci-driver sb_06: GetStatus port:2 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>ps3-ehci-driver sb_06: port 2 resume error -19
> > <7>ps3-ehci-driver sb_06: GetStatus port:2 status ffffffff 127  ERR POWER OWNER sig=? LPM RESET SUSPEND R
> > <3>ps3-ehci-driver sb_06: port 2 resume error -19
> > ...
> 
> It looks like the EHCI controllers are not powering on.  All those 
> ffffffff values are what you get when you read an unpowered register.
> It doesn't seem like this could be related to the new patch.  I'm 
> puzzled.
> 
> Let me know when you will have some more time available for testing.  
> Some of the changes in that patch are now in the mainline kernel, which 
> will make things easier.

Just to follow this up and close it out, I didn't find time to look at
this more, but some commit fixed this problem, and USB on PS3 started
working around 3.4.  If you are really interested in it I could try a
bisect to locate when.

-Geoff

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