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Date: Tue, 18 Mar 2008 20:12:13 +0100 From: Tino Keitel <tino.keitel@....de> To: Alan Stern <stern@...land.harvard.edu>, Jiri Kosina <jkosina@...e.cz>, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org Subject: Re: broken access to a USB HID device after suspend On Fri, Mar 14, 2008 at 08:13:36 +0100, Tino Keitel wrote: > On Thu, Mar 13, 2008 at 14:59:48 -0400, Alan Stern wrote: > > [...] > > > > Well, it seems to be "fixed" by a suspend/resume cycle. Do you have > > > a > > > hint how I could try to fix it without suspend/resume, to test if > > > it is > > > really the LCD's fault? > > > > Testing has to come before fixing -- you can't fix the problem if you > > don't know which component is at fault. For all we know, the > > hardware > > could be fine and the problem could lie in your application. > > I meant a method other than suspend/resume to fix the broken behaviour, > so that we get an indication where the problem exactly is. > > > > > All I can think of for testing is to use usbmon to record the data > > transfers when those -110 errors come up. > > Well, I still don't have USB_DEBUG or usbmon enabled, but I just got > that error again. I pulled the power plug from the LCD and replugged > it, without success. Then I did a suspend/resume cycle, and it worked. Hi again, I now have CONFIG_USB_DEBUG enabled, and the bug occurred again. Here is the kernel log: 2008-03-18_19:08:50.59598 kern.debug: usb usb3: usb auto-resume 2008-03-18_19:08:50.59606 kern.debug: usb usb3: wakeup_rh 2008-03-18_19:08:50.62971 kern.debug: hub 3-0:1.0: hub_resume 2008-03-18_19:08:50.62977 kern.debug: hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000 2008-03-18_19:08:50.62994 kern.debug: usb usb4: usb auto-resume 2008-03-18_19:08:50.62998 kern.debug: usb usb4: wakeup_rh 2008-03-18_19:08:50.66637 kern.debug: hub 4-0:1.0: hub_resume 2008-03-18_19:08:50.66644 kern.debug: hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000 2008-03-18_19:08:50.66662 kern.debug: usb usb2: usb auto-resume 2008-03-18_19:08:50.66666 kern.debug: usb usb2: wakeup_rh 2008-03-18_19:08:50.70342 kern.debug: hub 2-0:1.0: hub_resume 2008-03-18_19:08:50.70348 kern.debug: hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 2008-03-18_19:08:51.84851 kern.debug: usb usb3: suspend_rh (auto-stop) 2008-03-18_19:08:51.84858 kern.debug: usb usb4: suspend_rh (auto-stop) 2008-03-18_19:08:51.84862 kern.debug: usb usb2: suspend_rh (auto-stop) 2008-03-18_19:08:53.34640 kern.debug: hub 3-0:1.0: hub_suspend 2008-03-18_19:08:53.34646 kern.debug: usb usb3: bus auto-suspend 2008-03-18_19:08:53.34650 kern.debug: usb usb3: suspend_rh 2008-03-18_19:08:53.34654 kern.debug: hub 4-0:1.0: hub_suspend 2008-03-18_19:08:53.34658 kern.debug: usb usb4: bus auto-suspend 2008-03-18_19:08:53.34662 kern.debug: usb usb4: suspend_rh 2008-03-18_19:08:53.34666 kern.debug: hub 2-0:1.0: hub_suspend 2008-03-18_19:08:53.34670 kern.debug: usb usb2: bus auto-suspend 2008-03-18_19:08:53.34674 kern.debug: usb usb2: suspend_rh 2008-03-18_19:09:00.70316 kern.debug: usb 1-1.3: hidmon timed out on ep0in len=0/9 2008-03-18_19:09:00.70322 kern.debug: usb 1-1.3: usbfs: USBDEVFS_CONTROL failed cmd hidmon rqt 129 rq 6 len 9 ret -110 2008-03-18_19:09:00.70339 kern.debug: usb 1-1.3: manual set_interface for iface 0, alt 0 Regards, Tino -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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