I have an intel based (ICH6 centrino) laptop. USB2 worked fine when I
first installed linux (plain debian sarge, cannot remember kernel
version due to some problems during install). I have upgraded the kernel
three or four times since then.
A week ago I realized that ehci-hcd was not loading and `lspci -v` is
not showing up the EHCI host:
---- Relevant snip from lspci -v ----
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #1 (rev 04) (prog-if 00 [UHCI])
Subsystem: Uniwill Computer Corp Unknown device 9050
Flags: bus master, medium devsel, latency 0, IRQ 20
I/O ports at e480 [size=32]
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #2 (rev 04) (prog-if 00 [UHCI])
Subsystem: Uniwill Computer Corp Unknown device 9050
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at e800 [size=32]
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #3 (rev 04) (prog-if 00 [UHCI])
Subsystem: Uniwill Computer Corp Unknown device 9050
Flags: bus master, medium devsel, latency 0, IRQ 19
I/O ports at e880 [size=32]
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #4 (rev 04) (prog-if 00 [UHCI])
Subsystem: Uniwill Computer Corp Unknown device 9050
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at ec00 [size=32]
----- End of snip -----
I remember having one "00:1d.7 USB Controller... EHCI" line that is not
there anymore.
Any clue of what is happening? I have already tried some kernel boot
parameters (noapic, nolapic, acpi=off, pci=noacpi, irqpoll) getting
always the same result. Modprobing ehci_hcd do nothing more than loading
the module.
Usb2 (High speed) devices are loaded and work in compatibility mode
(full speed).
TIA for your help.
Oscar.
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