linux-kernel - Re: 2.6.33: Xorg+khubd lockup (D-state) BUG / ioctl EVIOCGNAME failed: Inappropriate ioctl for device / PreInit returned NULL

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Date:	Mon, 29 Mar 2010 12:58:05 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	Alan Piszcz <ap@...arrain.com>
Subject: Re: 2.6.33: Xorg+khubd lockup (D-state) BUG / ioctl EVIOCGNAME
 failed: Inappropriate ioctl for device / PreInit returned NULL

On Mon, 29 Mar 2010, Justin Piszcz wrote:

> bus pci, device 0000:00:0b.0
> OHCI Host Controller
> ohci_hcd
> OHCI 1.0, NO legacy support registers
> control 0x68f RWE RWC HCFS=operational IE PLE CBSR=3
> cmdstatus 0x00000 SOC=0
> intrstatus 0x00000020 FNO
> intrenable 0x8000004e MIE RHSC RD SF WDH
> ed_controlhead 7bef1b90
> hcca frame 0x4657
> fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
> fmremaining 0x80002b76 FRT FR=0x2b76
> periodicstart 0x2a2f
> lsthresh 0x0628
> hub poll timer off
> roothub.a 01000208 POTPGT=1 NPS NDP=8(8)
> roothub.b 00000000 PPCM=0000 DR=0000
> roothub.status 00008000 DRWE
> roothub.portstatus [0] 0x00000100 PPS
> roothub.portstatus [1] 0x00000100 PPS
> roothub.portstatus [2] 0x00000100 PPS
> roothub.portstatus [3] 0x00000100 PPS
> roothub.portstatus [4] 0x00000303 LSDA PPS PES CCS
> roothub.portstatus [5] 0x00000303 LSDA PPS PES CCS
> roothub.portstatus [6] 0x00000100 PPS
> roothub.portstatus [7] 0x00000100 PPS

I don't notice anything suspicious there.

> > At the same time, just to be increase my level of certainty, you should
> > apply the following debugging patch for ohci-hcd.  Let's see both the
> > usbmon trace and the dmesg log for the same event.  The trace and the
> > debugging patch will generate plenty of output during normal operation,
> > but don't worry about that.  Only the part starting from shortly before
> > the mouse quits really matters.
> Yes, I've done this before for a bug in the Intel USB controller (P55) on
> another motherboard.. Should be doable, always funny though how it does not
> happen when you are trying to make it happen.
> 
> For your patch, what does this patch against? It does not apply cleanly
> for 2.6.33.

Yes it does.  Maybe there's something wrong with the way your email 
client extracted the patch from the message.

> It also fails against 2.6.34-rc2, can you diff -u and show the patch so
> I can patch manually or include a patch against 2.6.33 or 2.6.34-rc2? 

That _was_ a "diff -u"-style patch.

Alan Stern

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