Ubuntu
linux package

  1. Bug #624510
  2. Comment #56

Comment 56 for bug 624510

Revision history for this message
Ming Lei (tom-leiming) wrote : Re: [Bug 624510] Re: Copying To USB Is Very Slow

Axis,

On Sun, Mar 18, 2012 at 4:35 PM, Axis Mann <email address hidden> wrote:
> The packages located at link
>
> http://kernel.ubuntu.com/~ming/bugs/624510/lucid-40.87-release/
>
> were tested and failed to correct the original Slow USB Read.  The read spead reverted
> to 5 MB/s after those changes were installed and computer rebooted.

Exactly, that is just what I expected, and now I am sure that it is
the below commit

      commit 004c19682884d4f40000ce1ded53f4a1d0b18206 upstream
      [PATCH] USB: EHCI: go back to using the system clock for QH unlinks

which fixes your performance problem.

Thanks again for your patient tests.