On Thu, 14 Mar 2013, Jiri Kosina wrote: > I have reverted all three commits, and the "nobody cared" is still there. > > > If you revert all three and still see the problem then it must be > > caused by changes outside of the USB stack. Differences in interrupt > > routing could be a result of changes to PCI or ACPI. Have you compared > > the current /proc/interrupts with versions from earlier kernels without > > this problem? > > The diff of stripped-down (without CPU statistics) /proc/interrupts from > some oldish working 3.1 and the current tree: > > --- /tmp/interrupts-old.txt 2013-03-14 16:30:46.938710286 +0100 > +++ /tmp/interrupts-new.txt 2013-03-14 16:30:18.954571413 +0100 > @@ -3,27 +3,28 @@ > 8:IO-APIC-edge rtc0 > 9:IO-APIC-fasteoi acpi > 12:IO-APIC-edge i8042 > - 16:IO-APIC-fasteoi uhci_hcd:usb6 > - 17:IO-APIC-fasteoi uhci_hcd:usb7 > - 18:IO-APIC-fasteoi ata_generic, uhci_hcd:usb8 > - 19:IO-APIC-fasteoi ehci_hcd:usb2 > - 20:IO-APIC-fasteoi uhci_hcd:usb3 > - 21:IO-APIC-fasteoi uhci_hcd:usb4 > - 22:IO-APIC-fasteoi uhci_hcd:usb5 > - 23:IO-APIC-fasteoi ehci_hcd:usb1 > + 16:IO-APIC-fasteoi uhci_hcd:usb4 > + 17:IO-APIC-fasteoi uhci_hcd:usb5 > + 18:IO-APIC-fasteoi ata_generic, uhci_hcd:usb6 > + 19:IO-APIC-fasteoi ehci_hcd:usb8 > + 20:IO-APIC-fasteoi uhci_hcd:usb1 > + 21:IO-APIC-fasteoi uhci_hcd:usb2 > + 22:IO-APIC-fasteoi uhci_hcd:usb3 > + 23:IO-APIC-fasteoi ehci_hcd:usb7, i801_smbus > 40:PCI-MSI-edge PCIe PME > 41:PCI-MSI-edge PCIe PME > 42:PCI-MSI-edge PCIe PME > 43:PCI-MSI-edge ahci > 44:PCI-MSI-edge i915 > 45:PCI-MSI-edge eth0 > - 46:PCI-MSI-edge iwlagn > + 46:PCI-MSI-edge iwlwifi > 47:PCI-MSI-edge snd_hda_intel > NMI:Non-maskable interrupts > LOC:Local timer interrupts > SPU:Spurious interrupts > PMI:Performance monitoring interrupts > IWI:IRQ work interrupts > +RTR:APIC ICR read retries > RES:Rescheduling interrupts > CAL:Function call interrupts > TLB:TLB shootdowns > > IRQ16 is routed differently (usb4 vs usb6), so that might be relevant. It looks like the order of probing changed. The old kernel did ehci-hcd before uhci-hcd and the new kernel did them in the opposite order. Consequently usb3-usb8 in the old kernel (the UHCI devices) are the same as usb1-usb6 in the new kernel. Likewise, usb1-usb2 in the old kernel are usb7-usb8 in the new kernel. In fact, the only major difference appears to be i801_smbus on IRQ 23. It's hard to see how that could have any effect. > > Is occurrence of the "nobody cared" connected with any particular > > device? Somebody reported a similar problem not long ago (although IIRC > > it was for OHCI rather than UHCI) which appeared to be related to > > activity on the built-in webcam. > > Will check this. No external devices are plugged in, I think the only > internal one it has is bluetooth chip. I'll try turning it off. All right. One other thing you could try: Transplant the entire uhci-hcd driver from 3.1 (or whatever) into 3.9-rc1. It should go okay -- you may have to apply by hand the appropriate parts of commits bc677d5b6464, 90ab5ee94171, and 9ffc93f203c1. 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
