I'm moving this thread over to the linux-usb-devel list, because it now seems more appropriate here.
To bring people up to speed, Gordon has noticed that his low-speed USB mouse gets frequent -EILSEQ errors, every 20 seconds or so, even when the mouse is just sitting idle. This is a low-level USB communications error detected by the UHCI hardware. But with other kernels and config settings, the errors don't occur at all! On Mon, 12 Mar 2007, Gordon Messmer wrote: > Gordon Messmer wrote: > > > > OK, I've got it. If I start with FC4's kernel configuration, and a > > vanilla kernel, the mouse works correctly. If I then turn on kernel > > preemption, and set HZ=1000, the problem comes up. Neither of those > > settings, by themselves, seem to trigger the problem. > > > > --- .config 2007-03-12 19:13:17.000000000 -0700 > > +++ ../test.config.2.6.19-usbproblem.9 2007-03-12 09:41:25.000000000 > > And just as a note: I was using 2.6.17. Ignore the filenames in the > diff. The problem seems to be the same in 2.6.19. I can try to test > other kernels if it'd help make sense of things. It would help if you could try out 2.6.20, since it is the most recent kernel. Verify that changing those two config settings causes the errors to start, whereas changing any one of them eliminates the errors. I must admit, I don't see how these config changes could affect the controller's behavior so much. Maybe there's some deep problem in your motherboard's chipset... 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
