Summary : When I started to listen to a USB serial GPS receiver, the interrupts of my sata disk were blocked until reboot :( Switching in the BIOS from 'APIC disabled' to 'APIC enabled' made the problem disappear. On Wed, Mar 02, 2011 at 08:34:50AM -0500, Mark Lord wrote: > On 11-03-01 10:00 AM, Philippe De Muyter wrote: > > On Tue, Mar 01, 2011 at 09:16:27AM -0500, Greg KH wrote: > >> On Tue, Mar 01, 2011 at 01:34:52PM +0100, Philippe De Muyter wrote: > >>> previously we had all but one usb interrupts on the same line as ata_piix : > >>> 5: 17183 XT-PIC-XT-PIC ata_piix, ata_piix, ehci_hcd:usb1, ehci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb5, uhci_hcd:usb6, uhci_hcd:usb7, uhci_hcd:usb8 > >>> while now they are spread on different lines : 16, 18, 19, 21 and 22 > >>> > >>> So I wonder if there is still a bug, but that it is not triggered anymore. > >>> > >>> Is there a way to tell which interrupt line the USB GPS receiver is connected > >>> to ? > >> > >> See which USB bus the device is on, using lsusb. It should match up > >> with the usbX number in the above list. > > > > Given that I get : > > > > tmp199:~ # lsusb > > ... > > Bus 007 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port > > tmp199:~ # cat /proc/interrupts > > CPU0 CPU1 > > ... > > 19: 996143 995511 IO-APIC-fasteoi ata_piix, ata_piix, uhci_hcd:usb5, uhci_hcd:usb7 > > tmp199:~ # > > > > my USB GPS receiver and my sata disk still share the same interrupt, I assume ? > > > > What's changed now is that this interrupt line is now IO-APIC-fasteoi instead > > of XT-PIC-XT-PIC. Maybe there's something to look at there ? > > > >> > >> Glad enabling APIC in your BIOS fixed this. > > > > I am glad too :) > > Nothing got "fixed" by doing that. > Swept under the rug, yes. > > But the bug is still there. If it is a bug (what I also believe) it is not a new one : Before installing 2.6.37-20-desktop (opensuse 11.4) on this new hardware, I had the same problem with 2.6.31.14-0.6-desktop (opensuse 11.2) and with 2.6.22.18-0.2-default (opensuse 10.3) The only interesting file where I find the word 'XT-PIC' is arch/alpha/kernel/irq_i8259.c Best regards Philippe -- Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles -- 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
