lkml.org 
[lkml]   [2011]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 3.0rc3-rc5: usb stops working after resume from suspend to ram
On Wed, 29 Jun 2011, Arkadiusz Miskiewicz wrote:

> On Wednesday 29 of June 2011, Alan Stern wrote:
> > On Wed, 29 Jun 2011, Arkadiusz Miskiewicz wrote:
> > > Hi,
> > >
> > > Something broke between rc3 and rc5. Thinkpad t400, logitech usb mouse.
> > > After resume from ram usb device no longer works. Somewhere around rc3 it
> > > was working fine.
> >
> > Obviously you can try bisection to find the problem. But if you don't
> > want to go through that, you could post the dmesg from a kernel that
> > has CONFIG_USB_DEBUG enabled.
>
> CONFIG_USB_DEBUG will be faster but I'll bisect if no one figures out what's
> wrong.

Actually bisection might end up being quicker. This looks like a
pretty tricky problem. Maybe you should start a bisection while I look
at this stuff; you'll probably reach an answer before I do!

> Note that I tried to unplug & plugin usb mouse after all this dmesg but
> nothing new appeared in dmesg - kernel didn't notice that I did that.

Something funny is going on. It might be a problem with the EHCI
controller.

> [ 72.848107] uhci_hcd 0000:00:1a.0: port 1 portsc 008a,00
> [ 72.848117] hub 3-0:1.0: port 1: status 0100 change 0003
> [ 72.848160] uhci_hcd 0000:00:1a.1: port 2 portsc 008a,00
> [ 72.848167] hub 4-0:1.0: port 2: status 0100 change 0003
> [ 72.860143] hub 2-0:1.0: port 4 status 0000.0100 after resume, -19
> [ 72.860149] usb 2-4: can't resume, status -19
> [ 72.860154] hub 2-0:1.0: logical disconnect on port 4
> [ 72.860314] ehci_hcd 0000:00:1a.7: port 4 full speed --> companion
> [ 72.860327] ehci_hcd 0000:00:1a.7: GetStatus port:4 status 003801 0 ACK
> POWER OWNER sig=j CONNECT
> [ 72.860567] ehci_hcd 0000:00:1a.7: GetStatus port:1 status 001800 0 ACK
> POWER sig=j
> [ 72.860575] ehci_hcd 0000:00:1a.7: failed handover port 1: 1800

That last line is the smoking gun. But I don't know what caused it. I
also don't know why unplugging and replugging the Logitech receiver had
no effect.

Alan Stern



\
 
 \ /
  Last update: 2011-06-29 23:29    [W:0.108 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site