Re: [1/4] 2.6.23-rc6: known regressions

[Mark Lord <lkml@rtr.ca>]

Greg KH wrote:
> On Wed, Sep 12, 2007 at 10:50:26PM -0400, Mark Lord wrote:
> > Michal Piotrowski wrote:
> > > Hi all,
> > > Here is a list of some known regressions in 2.6.23-rc6.
> > ...
> >
> > Missing from the list:
> >
> > USB "autosuspend" feature (new in 2.6.23) breaks *lots* of devices.
> > Many have since been blacklisted in one-at-a-time discovery patches,
> > but that's really just the tip of the iceberg.
> >
> > This "feature" breaks a TON of user-visible things,
> > mostly USB storage devices (USB drives/pens, digicams, etc..).
> >
> > The functionality is broken for just too much stuff,
> > and needs to either be reverted or defaulted to "off" rather than "on".
>
> Ok, after conferring with Oliver this morning, I think the best solution
> here is to both revert the usb-storage suspend patch as it has some
> basic problems that can cause data loss, _and_ add the change to the
> kernel that by default disables autosuspend on all USB devices except
> hubs.

Sounds like a sane approach.

Hopefully the kinks can be worked out in time for a reattempt in 2.6.24.
I understand how important this stuff is for battery powered devices,
but it just doesn't appear to be ready yet.

Cheers
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