the EHCI driver in GRUB has some known problems with low-speed transfers
and split transactions . On older machines this is not a big problem
since it's possible to connect low speed devices such a USB keyboard
directly to a port and use the UHCI driver instead. But modern Intel
chipsets do not have a UHCI companion controller any more, they only
have a EHCI controller with a normal USB 2.0 rate matching hub
permanently connected to the EHCI port inside the chipset.
Has anybody had time to look any more at the EHCI driver? Any ideas for
how to fix this?
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