Re: khbud stuck in D state

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Sun, 18 Nov 2007, Andrew Morton wrote:

> On Sun, 18 Nov 2007 12:12:56 -0500 (EST) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> > On Sun, 18 Nov 2007, Andrew Morton wrote:
> > 
> > > On Sun, 18 Nov 2007 01:51:12 -0800 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> > > 
> > > > Running RH 2.6.23.1-49.fc8 on a new laptop (lenovo t61p).  Unplugged the
> > > > serial mouse, plugged it into the other port, plugged my camera into the
> > > > original port and found everything in USB land to be dead.

> > Is this still not working?
> 
> It only happened the once.

Which makes it kinda hard to debug.  :-)

> > Does it work any better with a vanilla 
> > 2.6.23.1 kernel?  What does CONFIG_USB_DEBUG reveal?
> 
> Dunno, I haven't got onto building a kernel for this thing yet.  I'm still
> at the "gee I'm glad I thought of enbling AHCI in the BIOS but gee I'm sad
> I had to patch the X server" stage.  Next comes wireless...

About all I can say is that the problem seems to be caused by a missing 
hardware I/O completion event.  Maybe an interrupt wasn't delivered 
properly, or maybe the USB controller didn't update the in-memory data 
structures properly, ...

Alan Stern


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