I tested with the latest upstream kernel available:
2.6.38-999-generic #201103050905 SMP Sat Mar 5 10:18:37 UTC 2011
** I found this is not specific to USB external drives. the main and
only, internal drive on this machine exhibits the problem ***
To test, I duplicated a ~ 13GiB directory under
Hi Jason,
If you could also please test the latest upstream kernel available that would
be great. It will allow additional upstream developers to examine the issue.
Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the
upstream kernel, please remove the 'needs-upstre
vmlinuz-2.6.35-22-generic and vmlinuz-2.6.35-24-generic rather, sorry.
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https://bugs.launchpad.net/bugs/696212
Title:
Soft cpu lock copying files form external usb drive
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Having tested some more, it appears that the above doesn't actually fix
the problem.
However switching to a previous kernel does fix the problem. The most
recent kernel seems to exhibit the problem.
vmcoreinfo-2.6.35-22-generic OK
vmcoreinfo-2.6.35-24-generic NOT OK
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Disabling ehci_hcd as per this article appears to get rid of the
problem:
http://www.thinkwiki.org/wiki/Problem_with_USB_2.0
But this isn't a great workaround as usb transefers become agingly slow.
I can reproduce this on one laptop with two different makes of externel
usb drive.
The same drive
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https://bugs.launchpad.net/bugs/696212
Title:
Soft cpu lock copying files form external usb drive
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