[Intel-gfx] resume lagginess and other problems

[Jesse Barnes]

On Tue, 26 Jan 2010 16:37:28 -0500
Andrew Lutomirski <luto at mit.edu> wrote:
> > Sounds like you're getting a bunch of hotplug notifications on resume,
> > maybe due to lid events.  This may cause X to re-probe things, which
> > can take some time and CPU in the kernel.
> 
> As far as I can see, all of those "CHANGE" events have no effect (i.e.
> nothing about the device node actually changed).  Why is the driver
> generating them?

Probably because ACPI is giving it LID events.

> Is there any way to log ACPI events on resume to see if you're right?

You could use acpi_listen maybe, or add some code to the kernel's ACPI
button driver to trace it.

-- 
Jesse Barnes, Intel Open Source Technology Center