[Bug 88746] Re: ehci_hcd module causes I/O errors in USB 2.0 devices

[Andy Rabagliati]

I have a brand new machine, with Intrepid installed on it. My hardware
combination triggers this bug.

After reading this thread, and many others similar to it, I have
narrowed my problem down to the boot time interaction of ehci_hcd and my
Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer.

* Linux boxrd 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 GNU/Linux
* rmmod ehci_hcd -- works
* kernel recompile with USB non-modularised -- doesn't work (was suggested elsewhere)
* echo 64 > /sys/block/sdh/queue/max_sectors_kb -- doesn't work (and 120 also doesn't work)
* rmmod uhci_hcd -- Doesn't work (besides disabling my USB keyboard - suggested elsewhere)
* Unplug Bus 004 Device 002: ID 058f:6362  Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer -- works
* Plug in Bus 004 Device 002: ID 058f:6362  Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer after boot -- works

Logs attached - lspci-vvnn.log, lsusb.log (including Alcor), dmesg.log
(doesn't work) dmesg2.log (works)


** Attachment added: "lspci-vvnn.log, lsusb.log (including Alcor), dmesg.log (doesn't work) dmesg2.log (works)"
   http://launchpadlibrarian.net/20302875/logs

-- 
ehci_hcd module causes I/O errors in USB 2.0 devices
https://bugs.launchpad.net/bugs/88746
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