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From: walt <w41ter@gmail.com>
Subject: xhci support?
Date: Sat, 12 May 2012 18:48:29 -0700
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Hi!  I have an amd64 machine with an add-on usb3 adapter which
works well with the linux xhci driver, but the machine's BIOS
doesn't see any disks in the usb3 docking station I use.

My (elderly) grub-1.99-rc1 also doesn't see the outboard usb3
drives, so grub is depending on the BIOS for disk detection(?)

Am I mis-configuring grub, maybe?  I see that grub sources, even
the latest 1.99, include ohci.c and uhci.c, but not xhci.c, so maybe
it's not supported yet?

Thanks!