On Fri, 12 Oct 2012, Martin Vysny wrote: > usb issue: abrupt mouse movements, usb keyboard loosing key events > > After some boots, the USB mouse behaves strangely (abrupt mouse > movements), also, USB keyboard tends to loose some keypresses. This > behavior occurs randomly (I can't find out what's causing this) and > lasts from the point when lightdm is displayed until the computer is > rebooted. This issue never starts to manifest during computer runtime - > either it is present right from the Ubuntu start, or it does not occur. > The issue is never present in grub menu, in Windows, nor in BIOS menu. > Sometimes, the bug manifests in multiple consecutive reboots. > Running commands as described here: > http://davidjb.com/blog/2012/06/restartreset-usb-in-ubuntu-12-04-without-rebooting > fixes the issue (until the following computer boot - not necessarily the > very next boot). There is an interesting warning in my dmesg about > ignored IRQ 17 - perhaps it is somehow related? > [ 40.224653] irq 17: nobody cared (try booting with the "irqpoll" option) > [ 40.224668] [<c10c6d49>] __report_bad_irq+0x29/0xd0 > [ 40.224678] [<c10c4e3f>] handle_irq_event_percpu+0x9f/0x1d0 > [ 40.224680] [<c10c7970>] ? unmask_irq+0x30/0x30 > [ 40.224688] [<c10c4fab>] handle_irq_event+0x3b/0x60 > [ 40.224689] [<c10c7970>] ? unmask_irq+0x30/0x30 > [ 40.224691] [<c10c79be>] handle_fasteoi_irq+0x4e/0xd0 > [ 40.224692] <IRQ> [<c15cff12>] ? do_IRQ+0x42/0xc0 > [ 40.224728] [<c142feb0>] usb_hcd_irq > [ 40.224729] Disabling IRQ #17 Undoubtedly this is related. Here's a debugging patch to help get more information. Let's what shows up in your system log with the patch installed. Alan Stern Index: usb-3.6/drivers/usb/host/ehci-hcd.c =================================================================== --- usb-3.6.orig/drivers/usb/host/ehci-hcd.c +++ usb-3.6/drivers/usb/host/ehci-hcd.c @@ -727,6 +727,7 @@ static irqreturn_t ehci_irq (struct usb_ /* Shared IRQ? */ if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) { spin_unlock(&ehci->lock); + ehci_info(ehci, "Unwanted IRQ: %x %x\n", status, masked_status); return IRQ_NONE; } -- 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
