I can confirm this happening on two Centrino Duo laptops. The problem is
quite fascinating in my testing: (fascinating meaning that the ubuntu
kernel team should probably reach for aspirin before reading on)
(1) It happens only when certain USB mass storage devices AND certain
USB controllers are combined. A RockChip USB MP3 player and the Centrino
Duo causes this to happen, while a Sandisk MP3 player (or a no-name
external hard drive) and the same USB chipset does not cause the
problem.
(2) The problematic device, when connected to my NForce3 based desktop
running an identical Ubuntu setup, does not cause this problem.
(3) The problematic device connected to another different brand laptop
using the same USB chipset causes the problem.
(4) Under Windows XP, everything works happily.
(5) rmmodding ehci-hcd (disabling USB 2.0) prevents the device from
unmounting or disconnecting, but transfers still stall and fill dmesg
with abundant errors fairly quickly.
(6) Using ehci-hcd, if you dd from the block device, everything works
fine with a bs=xxx where xxx < 900. Go above 900, and the device
disconnects.
** Changed in: linux-source-2.6.17 (Ubuntu)
Status: Unconfirmed => Confirmed
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USB mass storage stops working after a while
https://launchpad.net/bugs/61235
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