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

[lisajo]

I don't eally think this is only alcor-specific; please refer to:
http://ubuntuforums.org/showthread.php?p=8415658

Some details on what I tried; regardless, I'm still seeing
“usb 1-5: reset high speed USB device using ehci_hcd and address 3”

Same results with the following Kernels:
Linux ubuntu 2.6.32-5-generic (Lucid daily build 2009-11-30)
Linux ubuntu 2.6.31-50-generic (current one in Karmic)

Also same results trying different schedulers following the post from
Hated on Mostly (noop, as and cfq on boot time with Kernel parameter and
at runtime as described above).

The hardware involved:
2 external hdds, 3 USB – flash – disks; only difference is that the time to reset in dmesg varies.

The onboard – controller on my MB having all this trouble is:
USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI Controller [1002:4396]

I do have no other hardware on USB – Bus; not even keyboard and mouse.

How I can get to work with USB:
Disabling USB2.0 – support in BIOS, or using the USB – ports on a USB – PCI – controller I added (because of this bug) with NEC – controller:
USB Controller [0c03]: NEC Corporation USB 2.0 [1033:00e0] (rev 04)

I think USB2.0 – support should be absolutely reliable on modern computers with a current OS.
Please, review this bug.
I'm not a programming professional, but I'll try providing whatever information can help sorting this out.

Regards, lisajo

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