On Fri, 2 Mar 2007, Gordon Messmer wrote: > > Did you really mean it that the earlier kernels don't generate those "-84" > > lines? > > Yes. As far as I can tell, no matter how long I watch usbmon on a > "working" kernel, there is no output if I don't actually move the mouse.
Hmm. So the problem does not occur in 2.6.17 and it does occur in 2.6.18? Under those circumstances I would recommend bisection: try the intermediate -rc kernels and perhaps even git -bisect to find exactly when the trouble started. However that's a whole lot of extra work for you, and you might not want to do it. > > the presence or absence of > > an I/O error shouldn't depend on the kernel version. > > I agree completely. > > > Do you have any sort of CPU power saving (like cpufreq) enabled? > > Not as far as I can tell. None of the cpufreq modules are loaded. I > had seen suggestions in other people's discussions of similar problems > that gnome-power-manager might be at fault, but killing it doesn't solve > the problem. I see resets even when no user is logged in to the > console, anyway. Have you tried booting into single-user mode? That would reduce the number of processes. :-) > When running 2.6.19 I see a process named [ksuspend_usbd], but I don't > know what that is. It's a kernel thread responsible for suspending idle USB devices. Under 2.6.19 it doesn't do very much; in 2.6.20 it's a little more active (it will suspend hubs with no devices attached, for instance). In neither kernel will it try to suspend a USB mouse, even one that's not in use. That feature hasn't been added yet. > > Another reason to think there may be a systematic cause, something that > > interferes with the USB controller periodically. But it isn't anything in > > the USB stack. > > Perhaps not, but it does seem like the kernel is somehow at fault. No > other component of the system actually changes. It's possible that > something doesn't run on the older kernel due to a missing interface of > some type, but I don't really know what that might be. Other than a few > new kernel processes, I don't see any significant difference in 'ps' > output between the old and new kernels. Yes, at this point it's hard to say what's going on. 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-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
