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-rw-r--r--sys/dev/usb2/controller/uhci2_pci.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/dev/usb2/controller/uhci2_pci.c b/sys/dev/usb2/controller/uhci2_pci.c
index 97a28a8..70cbd3a 100644
--- a/sys/dev/usb2/controller/uhci2_pci.c
+++ b/sys/dev/usb2/controller/uhci2_pci.c
@@ -320,7 +320,9 @@ uhci_pci_attach(device_t self)
sc->sc_bus.usbrev = USB_REV_1_0;
break;
default:
- sc->sc_bus.usbrev = USB_REV_UNKNOWN;
+ /* Quirk for Parallels Desktop 4.0 */
+ device_printf(self, "USB revision is unknown. Assuming v1.1.\n");
+ sc->sc_bus.usbrev = USB_REV_1_1;
break;
}
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