On Sat, 6 Oct 2007, Jonas Nicolaisen wrote: > Here's a very strange thing. The Razer mouse works on this same machine > when I use an old Knoppix CD, kernel 2.4.20. Correctly detected, no > error messages, no b0rkage. > > I'm puzzled. > > It looks as if it's using driver usb_mouse instead of usbhid. > > I won't go back to kernel 2.4 though :-/ > > So it looks like the mouse is working (it also works on another Linux > machine I tested it on, kernel 2.6.16 and an UHCI hub there.)
If you try 2.6.16 on your regular machine, does the mouse work? > It's not the cable. And apparently it's not the USB hub either, since > the Knoppix live system can cope with this mouse/hub combo just fine. > > Going back to Gentoo with kernel 2.6.22.9, same status -84 messages in > syslog again. > > Should I try something like kernel 2.6.7? I don't see any point in that. > Can it be that it's a hotplug issue? I doubt it very much. Hotplug problems tend to cause the driver not to be loaded at all. That's not what you're seeing. > After the knoppix experiment, I'm really puzzled. Nothing in any of the > logs there. Mouse just working (TM). > > > > > > It could be. Unlikely but possible. You could try putting a powered > > hub between the computer and the mouse. > > > > I might try that anyway, but it looks as if that's not the problem... > > > > > > Any hope to really fix this? > > > > > > > > It's a hardware problem. Probably the easiest way to fix it is to > > > > replace the mouse. > > > > > > Hm, after the Knoppix experiment I'm not really sure anymore if it's a > hardware problem. It looks more like something changed in the newer USB > or HID drivers that made this hardware _stop_ working. It's possible that the older kernels _were_ getting the same errors, but they simply ignored them. Careful error handling was added to usbhid only fairly recently. > Could usbmon help? It could. Certainly it's worth a try. Use it with both the non-working 2.6.22 kernel and the working 2.6.16 (or whatever) kernel. > > In theory it could be either one -- or even a weird incompatibility > > where each is off by just a little bit, so they can work with other > > devices but not with each other. > > > > The knoppix experiment looks like they _can_ work with each other. > > dmesg from knoppix attached. Need more info? There's no useful information in the Knoppix dmesg. However it might be useful for you to build 2.6.22 with CONFIG_USB_DEBUG enabled and post the dmesg from that, with all the errors. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
