Re: [linux-usb-devel] Re: [GIT PATCH] USB patches for 2.6.13

[David Brownell <david-b@pacbell.net>]

Hi Mark,

> Is someone actively working on USB Suspend/Resume support yet?

I've got some patches that need refreshing and splitting-out that
don't seem like 2.6.14 material in the "new world", but maybe a
few of them are.

There are also a handful of EHCI and OHCI fixes pending for 2.6.14
which aren't in Greg's latest batch, some of which affect USB PM.
I understand they'll get into the MM tree soon.


> I ask because this is becoming more and more important as people
> shift more to portable notebook computers with Linux.
>
> Enabling CONFIG_USB_SUSPEND is currently a surefire way to
> guarantee crashing my own notebook on suspend/resume,
> whereas it *usually* (but not always) survives when that
> config option is left unset.

That's strange.  For me it's been closer to the other way around,
except that things never crash for me.  Something tells me your
hardware and/or BIOS is different...

Some of the PM and usbcore changes have been tweaking assumptions;
which of course makes some of the more sensitive code paths unhappy.


> Nothing complicated in the configuration -- just a USB mouse,
> but that's enough to nuke it.
>
> Anyone looking at that stuff right now?

I don't know that anyone's looking specifically at the issue that
the HID (mouse) driver has; I'm not.

If your system behaves OK without that mouse connected, it ought
to be easy to fix that one bug.  If not, forward details to
linux-usb-devel (separate thread).

- Dave

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