Hi:
I have a problem with this buggy hardware (Sony VAIO, don't buy).
Background:
Booting with both acpi and apic enabled (if the system doesn't die with
some fatal trap) the system grinds to a halt with 85% interrupt activity.
Booting with apic disabled solves that problem, but then the system
freezes after a while and while the system is still functional there is
3.5-4% interrupt when running top.
Disabling pci_link boots the system up stable, but not all devices are
configured correctly. There are IRQ conflicts and interrupt storms.
Without pcilink irq's are not configured correctly and with the system
eventually freezes. I do not know if I can assume the irq's assigned
with pcilink enabled as I don't know if this is what causes the conflict.
The problem:
Without pcilink two UHCI controlers are not assigned valid irqs and USB
is slow, a usb stick takes a long time before it appears as a mountable
device.
There is an irq storm at irq 9, both with and without pcilink. The
devices (with pcilink) which get irq 9 are the ichsmb and a USB
controler (UHCI).
Things get more messy: There's a built in web cam (USB 2.0) attached to
the usb port.
addr 1: UHCI root hub, Intel
addr 1: UHCI root hub, Intel
addr 1: EHCI root hub, Intel
addr 2: USB2.0 Web Camera, Vimicro Corp.
I believe irqs changes when I boot with/without pcilink:
with pcilink I have:
00:1d.0 USB Controller: USB UHCI #1 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 5
00:1d.1 USB Controller: USB UHCI #2 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 9
00:1d.2 USB Controller: USB UHCI #3 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 3
00:1d.3 USB Controller: USB UHCI #4 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 10
00:1d.7 USB Controller: USB2 EHCI (rev 03) (prog-if 20 [EHCI])
Flags: bus master, medium devsel, latency 0, IRQ 5
and without pcilink:
00:1d.0 USB Controller: USB UHCI #1 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 5
00:1d.1 USB Controller: USB UHCI #2 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 10
00:1d.2 USB Controller: USB UHCI #3 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 255
00:1d.3 USB Controller: USB UHCI #4 (rev 03) (prog-if 00 [UHCI])
Flags: bus master, medium devsel, latency 0, IRQ 255
00:1d.7 USB Controller: USB2 EHCI (rev 03) (prog-if 20 [EHCI])
Flags: bus master, medium devsel, latency 0, IRQ 5
Question:
How do I assign IRQs to the usb controlers? pciconf shows the controlers
on pci0:29:0 .. pci0:29:3 (UHCI) and pci0:29:7 (EHCI).
How do I determine which IRQs to assign - apart from trial and error?
Thansk for reading all the way down to the questions :) double up for
any help :D
Cheers, Erik
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