Ubuntu
linux-source-2.6.20 package

  1. Bug #88746 (ehci-hcd)
  2. Comment #213

Comment 213 for bug 88746

Revision history for this message
Markus Kienast (elias1884) wrote : Re: [Bug 88746] Re: ehci_hcd module causes I/O errors in USB 2.0 devices

Robert North:

Actually my USB ports are reporting as internal USB HUB ports in dmesg.
And these internal USB HUB ports don't seem to work with autosuspend! I
can only repeat what I said earlier: Screw it! Turn of autosuspend
completely in Hardy as long as it is causing on any system!!!!!!

It does not make no sense to look unpolished just for the few gains a
minority of people has from that feature. Anybody who wants to conserve
power will just unplug USB devices he is not using anyways!!!!

If you still want to go on fixing this with blacklists ...., you can
check which chipset I have in the many hardware information I have
submitted already. I know it sucks, that you have to walk your way
through this bug report to find the right bits and pieces and that is
why I can't stop to rally for this bug/wishlist item: Bug #3382

It describes how HW information should be attached to ones launchpad
profile, so one would not have to upload the same stuff to so many
different bug reports over and over again.

It also describes how the HW info could be gathered by a/the HWDB tool.

And it describes how convenient it could be for devs/bugfixers to e.g.
query for a list of all USB chipsets affected by this bug.

Without that, I can't imagine tracking down HW bugs can be any fun!

On Sun, 2007-12-30 at 01:49 +0000, Robert North wrote:
> The following link contains important documentation for users & developers regarding this bug....
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/usb/power-management.txt;h=b2fc4d4a99177be7bd48dce560d1f28417c60aa9;hb=HEAD
>
> This decsribes issues in the 2.6.24 kernel....
> In short, so many USB devices don't autosuspend properly, that blacklisting them has been pushed to user-mode.
> By default in the new kernel, autosuspend is disabled for everything but USB hubs.
> Because they've left autosuspend enabled for USB hubs, and this may still be hitting some of us.
> (Maybe that's what I've been seeing when running Hardy alpha2)
>