[PATCH] UBUNTU: SAUCE: acer-wmi: Add wireless quirk for Lenovo 3000 N200

[Seth Forshee]

On Fri, Oct 07, 2011 at 12:47:41AM +0100, Colin Ian King wrote:
> On 06/10/11 21:35, Seth Forshee wrote:
> >This patch has been submitted upstream and acked by the acer-wmi
> >maintainer, but it has not yet been merged. Without this fix the
> >affected model has a permanent soft block on wireless whenever acer-wmi
> >is loaded, and the regression potential of the fix is very small as it
> >is a DMI quirk for a single model. Therefore, I'm proposing we SRU this
> >as a sauce patch at this time to get the fix into oneiric sooner.
> >
> >== SRU Justification ==
> >
> >Impact: acer-wmi is lacking a required quirk for the Lenovo 3000 N200
> >wlan rfkill. As a result, wireless is permanently blocked on this
> >machine whenever acer-wmi is loaded.
> >
> >Fix: Add quirk to use the correct EC register for updating the wlan
> >rfkill status.
> >
> >Testcase: Loading acer-wmi without the fix results in a permanent wlan
> >soft block. With the fix the rfkill switch behaves as expected. Verified
> >against natty on LP #857297.
> >
> >BugLink: http://bugs.launchpad.net/bugs/857297
> >
> I've got a Lenovo 3000 N200, so I'm very curious why the acer-wmi
> module is being loaded. By default this platform driver is not
> loaded.

acer-wmi actually seems to support a number of Lenovo models. The
machine the bug was reported on has WMI guid
67C3371D-95A3-4C37-BB61-DD47B491DAAB, which is one of those that
acer-wmi lists in its module aliases. as well as another guid the driver
uses, 431F16ED-0C2B-444C-B267-27DEB140CF9C. And the driver does seem to
generally work on the laptop, I'm even reusing an existing quirk in the
patch.

It does seem that there are a couple of sub-models sold under this name,
so if the driver doesn't load on yours you might compare your DMI
information and DSDT to that in the bug. They may not be the same.