Messages in this thread | | | Date | Thu, 13 Mar 2008 16:14:03 +0100 | From | Tino Keitel <> | Subject | Re: broken access to a USB HID device after suspend |
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On Thu, Mar 13, 2008 at 10:59:26 -0400, Alan Stern wrote: > On Wed, 12 Mar 2008, Tino Keitel wrote: > > > On Wed, Mar 12, 2008 at 17:44:56 -0400, Alan Stern wrote: > > > > [...] > > > > > Tino, it would help to see a kernel log showing what happened during > > > the suspend, resume, and failure of hidmon. It would help even more if > > > you test under a kernel with CONFIG_USB_DEBUG enabled. > > > > A full kernel log is available at http://tikei.de/dmesg > > > > > > > > Even if you can't reproduce the problem, do you have the complete > > > kernel log from before? > > > > > > Is it possible that this is really a problem with the LCD device, not > > > with the kernel? I ask because if the device was working properly then > > > unplugging and replugging the USB cable should do a complete reset. > > > > I did the following: > > > > - suspended the computer > > > > - switched off the LCD > > And switched it back on at some point?
Err, yes, right after resume.
> > > - resumed the computer > > > > - tried to use hidmon, got the error > > > > - unplugged the LCD > > > > - plugged in the LCD > > > > - tried to use hidmon again, got the error again > > > > - suspended the computer > > > > - resumed the computer > > > > - tried to use hidmon again, and it worked > > > > Note that I didn't switch off the LCD during the second suspend, in the > > case that matters. > > Well, this isn't what your log shows. > > According to the log, you booted the computer on March 10 and about 12 > minutes later started getting those -110 errors on the LCD device.
Uh, it looks like I just didn't noticed that.
> Then you suspended the computer with no apparent problem. > > Two days later you suspended three more times, and the the LCD monitor > was disconnected during the third suspend. When it came back, you
What log message do you refer to here?
> started getting the errors again. > > Next you unplugged and replugged the hub into which the LCD was > connected. Again there was another -110 error. Finally you suspended > and resumed. > > To me that makes it look like the LCD's problems have no connection at > all with suspend/resume.
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?
Regards, Tino
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