> Currently there is no way to change the polling rate, unless you use a > USB-2 port. I see. Any ideas why the USB 3.0 port should affect the game Witcher 2 like in the video if that is an hardware/driver issue or SDL or maybe combination? Thanks for the fast reply, Best Regards Artur O. On Mon, Aug 18, 2014 at 8:15 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 18 Aug 2014, Commander wrote: > >> Hi. was told to forward my bug-report here. >> >> The issue in short: >> When connecting the mouse in USB 3.0 the mouse wont have higher >> polling rate than 125Hz and will behave erratic in Witcher 2. >> >> More details is on the kernel Bugzilla. >> https://bugzilla.kernel.org/show_bug.cgi?id=82571 > > The real problem is that xhci-hcd (the driver for USB-3 controllers) > doesn't implement the technique used by the mousepoll option in usbhid. > If you enable debugging for xhci-hcd, you'll see a warning > about it in the kernel log. Something like this: > > Driver uses different interval (8 microframes) than xHCI (64 > microframes) > > xhci-hcd always uses the polling rate given in the mouse's endpoint > descriptor. It ignores the value requested by usbhid. > > Currently there is no way to change the polling rate, unless you use a > USB-2 port. > > Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
