Can I disable EHCI?

Alexander E. Patrakov patrakov at
Thu Dec 21 21:04:45 PST 2006

Dominic Hilsbos wrote:
> LFSers:
> I'm building on a system that only has USB 1.1 ports (OHCI compatible) 
> but when I plug my USB key into a port I get the following errors:
> ehci_hcd  0000:00:1d.7: port 2 reset error -110
> hub 1-0:1.0: hub_port_status failed (err = -32)
> hub 1-0:1.0: Cannot enable port 2.  Maybe the USB cable is bad?
> The key works beautifully with my Windows systems.
> I notice that the first line mentions EHCI, but as a 1.0/1 port I would 
> think that OHCI would be handling it, yes?
> As such is there a flag that I can send to the livecd kernel that will 
> tell it not to use EHCI, and if I do will it use OHCI?

Sorry, no. However, you can remaster the CD according to the included

> I need to be able to mount the USB key within the livecd environment, as 
> I need to replace the Bzip2 that comes on the CD, it's giving errors 
> when I try to decompress it.

This is not reproducible with the CDs from year 2006. So it looks like one
of the following bad things happened:

  * Bad download of the CD - verify the SHA1 sum of the iso against

  * Bad burn - please burn with the -dao or -raw crdecord flag, and verify
the SHA1 sum of /dev/cdrom against

  * Your CD-ROM is manufactured before year 1999 and doesn't properly
support DMA. Try booting with "linux ide=nodma" command line.

  * Bad RAM - as the CD itself is compressed, it is very sensitive to
single-bit damages. memtest86+ is your friend.

BTW, this might also fix the EHCI error.

Alexander E. Patrakov

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