On Tue, 9 Jan 2007, Jiri Kosina wrote: > On Thu, 4 Jan 2007, Alan Stern wrote: > > > > > > I suspect it has something to do with sysfs or usbfs. This USB > > > > > keyboard hang has not happened before (and I have the same hardware in > > > > > this box for over a year, and I compile and test most of the rcX > > > > > kernels). My workloads are CPU intensive (simulations, optimization > > > > > problems, data clustering) and this is the first serious I/O stress > > > > > test, but I would have noticed if it ever happened. > > > > Do USB and your network card share an interrupt line? > > > No, they do not. > > > > Could you enable DEBUG in drivers/usb/input/hid-core.c? > > > Will do and report back. > > Any results yet? > > Hi Alan, > > a few days ago I have received message from Florian off-list, where he > provided me the following: (I have also CCed it to linux-usb-devel, as can > be seen on [1]): > > == cut here == > I have recompiled the kernel with DEBUG defined to 1 in hid-core.c but > I have't got anything except that the keyboard was disconnected then > reattached: > > [ 3583.910202] usb 1-3: USB disconnect, address 3 > [ 3583.910208] usb 1-3.2: USB disconnect, address 5 > [17524.627801] usb 1-3: new high speed USB device using ehci_hcd and > address 6> > [17524.688175] usb 1-3: configuration #1 chosen from 1 choice > [17524.688243] hub 1-3:1.0: USB hub found
Is this hub built into the keyboard? It's rather unusual for a keyboard device to have a built-in high-speed hub (since keyboards run at low speed), but it's not impossible. > [17524.688283] hub 1-3:1.0: 4 ports detected > [17524.833265] usb 1-3.2: new low speed USB device using ehci_hcd and > address 7 > [17524.885024] usb 1-3.2: configuration #1 chosen from 1 choice > == cut here == > > I first thought whether this is not a HID-layer issue, but this kind of > convinced me that the problem is USB-related. > > I am trying to reproduce it here, but so far with no luck. > > [1] > http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg49484.html I also wrote to Florin back in December, suggesting he turn on CONFIG_USB_DEBUG to get more information. It also would help to have a usbmon log. The fact that the disconnect message appears doesn't mean the problem is related to the kernel's USB stack; it could be a hardware problem. It's also possible that the problem has nothing to do with NFS usage. Without more information from Florin we can't tell anything about what's really happening. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
