PROBLEM: [2.4.23&&2.6.1 ohci] USB HC TakeOver failed!

Hi.

I just got my new JVC MP-XP7250 which has USB 2.0. The old version (XP7210) had only USB 1.1, and the usb-ohci driver of 2.4.x and 2.5.x worked fine on that hardware. But on the XP7250, I can't seem to get USB 1.1 devices working. ehci-hcd loads fine without
any troubles, and if I connect a USB 2.0 FlashDisk for instance, it is recognized and works.
But if I load ohci-hcd (2.6.1), I do get the following:

ohci_hcd: 2003 Oct 13 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI)
ohci_hcd: block sizes: ed 64 td 64
ohci_hcd 0000:00:0f.0: OHCI Host Controller
ohci_hcd 0000:00:0f.0: USB HC TakeOver failed!
ohci_hcd 0000:00:0f.0: can't reset drivers/usb/core/hcd-pci.c: init 0000:00:0f.0 fail, -1
ohci_hcd: probe of 0000:00:0f.0 failed with error -1 ohci_hcd 0000:00:0f.1: OHCI Host Controller
ohci_hcd 0000:00:0f.1: USB HC TakeOver failed!
ohci_hcd 0000:00:0f.1: can't reset drivers/usb/core/hcd-pci.c: init 0000:00:0f.1 fail, -1
ohci_hcd: probe of 0000:00:0f.1 failed with error -1

lspci |grep 00:0f
00:0f.0 USB Controller: NEC Corporation USB (rev 43) 00:0f.1 USB Controller: NEC Corporation USB (rev 43) 00:0f.2 USB Controller: NEC Corporation: Unknown device 00e0 (rev 04)

ehci-hcd seems to attach to 00:0f.2, and ohci-hcd tries to grab 00:0f.0 and 00:0f.1, but fails on both.

This is fairly problematic for me, since I absolutely
do need a USB 1.1 only serial adaptor to be
able to use the machine at all (Braille display).... So any help would really be appreciated. I'd be willing to test patches too!

Searching for this bug on google reveals that in the past years, several patches were written for the HC TakeOver problem. Is this a common breakage?

P.S.: I believe about the same problem was recently reported to linux-usb-users (same laptop, same HC TakeOver message). The poster didn't get a reply to his enquiry though :-(.

Thanks,
  Mario