Comment 39 for bug 624510

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

On Wed, Mar 14, 2012 at 2:10 PM, Axis Mann <email address hidden> wrote:
> An additional thought/question.  Shouldn't you want to look at the
> dmesg, lsusb, and lspci output from Lucid rather than Oneiric since the
> problem I am experiencing is on Lucid?

Looks the problem is about ehci host controller driver, because the
'csw' completes
very slow on lucid release, but no such thing on Oneiric, see below trace:

Lucid trace:
f6305800 716082026 S Bi:1:003:1 -115 13 <
f6305800 716093942 C Bi:1:003:1 0 13 = 55534253 71000000 00000000 00

Oneiric trace:
f3ea8580 2484657937 S Bi:1:002:1 -115 13 <
f3ea8580 2484657945 C Bi:1:002:1 0 13 = 55534253 26b20000 00000000 00

Just have a quick look at Lucid ehci patches and found most of ehci
unlink/queue patches have been merged to lucid, so could you confirm
that you have updated
to the latest Lucid release? If not, please try 'sudo apt-get update&&
sudo apt-get
dist-upgrade', then redo the test to see if there are any improvements.

Thanks,