Hello Serguei, On Thu, Mar 03, 2011 at 06:23:12PM +0300, Sergei Shtylyov wrote: > Hello. > > Philippe De Muyter wrote: > >> 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. > >>>>>> 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 > > Why it's interesting if you're not really on Alpha? Because there is > also arch/x86/kernel/i8259.c (and several others)... Sorry, I picked the wrong line when doing cut'n paste. Of course, it is arch/x86/kernel/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
