Suspend issues with ehci-hcd

[Matthew Garrett]

On Fri, May 09, 2008 at 01:27:33PM -0600, Tim Gardner wrote:
> Matthew,
> 
> I've encountered several suspend issues lately involving ehci-hcd. I'm
> considering what might be the side effects of adding it to pm-utils as a
> normal operation, e.g., add ehci-hcd to the list of modules that are
> always removed before suspend.

We used to do that, but stopped when USB gained reasonable 
suspend/resume support.

> What happens to a USB disk mounted as root? Will it fix corruption
> issues where non-root USB drives don't get flushed?

If you have a USB disk mounted as root, you'll lose your root 
filesystem. I'm not aware of any situations where data should hit USB 
devices on removal but not on suspend, but it's possible.

> Removing ehci-hcd prior to suspend does fix a whole class of bluetooth
> issues.

Is this not because it ends up destroying and recreating the bluetooth 
device?
-- 
Matthew Garrett | mjg59 at srcf.ucam.org