Messages in this thread | | | From | Michel Bouissou <> | Subject | Re: VIA KT400 + Kernel 2.6.12 + IO-APIC + uhci_hcd = IRQ trouble | Date | Mon, 25 Jul 2005 22:14:06 +0200 |
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Le Lundi 25 Juillet 2005 21:18, Alan Stern a écrit : > > It seems quite clear that the EHCI controller's IRQ line is causing the > problems. Just out of curiousity, what happens if you really do remove > the UHCI driver, keeping only the EHCI driver, and then plug in the mouse? > Off hand I would expect nothing much to happen -- maybe a line or two in > the system log, no change to the IRQ counters, and the mouse doesn't work > (not even erratically).
As you expect, in such a condition (with only ehci loaded), absolutely nothing happens when plugging the mouse.
OTOH, a high-speed device is recognized, althouh it generates messages like:
totor kernel: usb 1-5: device not accepting address 3, error -71 totor kernel: usb 1-5: new high speed USB device using ehci_hcd and address 4 totor kernel: usb 1-5: device not accepting address 4, error -71 totor kernel: usb 1-5: new high speed USB device using ehci_hcd and address 5
If plugged to any USB socket, except the two integrated to the motherboard connectors plate. There only it fully succeeds without such errors.
Cheers.
-- Michel Bouissou <michel@bouissou.net> OpenPGP ID 0xDDE8AC6E - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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