On Fri, 23 Nov 2007, Kirill A. Shutemov wrote: > On [Thu, 22.11.2007 21:51], Alan Stern wrote: > > On Thu, 22 Nov 2007, Marin Mitov wrote: > > > > > > > > I've had some strangenesses with USB lately. Sometimes running > > > > > > `lsusb' > > > > > > makes the USB system notice a newly attached device. > > > > > > > > > > No. But I have new messages in dmesg: > > > > > > > > > > uhci_hcd 0000:00:1d.3: FGR not stopped yet! > > > > > uhci_hcd 0000:00:1d.2: FGR not stopped yet! > > > > > uhci_hcd 0000:00:1d.1: FGR not stopped yet! > > > > > uhci_hcd 0000:00:1d.0: FGR not stopped yet! > > > > > > > > > > > Is that "FGR not stopped yet!" messgae new behaviour? > > > > > > > > > > It is a new message since 2.6.24-rc3. I have never try -mm tree > > > > > before. > > > > > > > > These messages could indicate a timing problem. You can see the code > > > > that writes the messages near the end of wakeup_rh() in > > > > drivers/usb/host/uhci-hcd.c. > > > > > > > > The message gets written if the controller hardware hasn't turned off a > > > > particular bit after a 4-us delay. If the udelay() function wasn't > > > > working right, it could cause this problem. > > > > > > udelay() _is_ OK for 2.6.24-rc3, so it is not the cause of the problem > > > > But is it OK for 2.6.24-rc3-mm1? Kirill said specifically that > > 2.6.24-rc3 does not display the message but 2.6.24-rc3-mm1 does. > > How can I test it?
Any progress? How about more recent kernels? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
