19 Feb
2017
19 Feb
'17
7:30 p.m.
Ralf Mardorf wrote:
If I unbind the ehci device that shares the IRQ with
audio cards, still
all 10 available USB ports work
Could somebody explain what this does mean?
EHCI controllers handle _only_ high-speed (USB 2.0) connections; full-
and low-speed connections require a separate controller (OHCI or UHCI).
You probably have a bunch of those.
If I unbound ports on my old mobo, they stopped
working.
Some chipsets have EHCI controllers with a built-in hub that handles
full-/low-speed connections, so for the OS, all connections end up at
the EHCI controller.
Regards,
Clemens