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SubjectRe: [PATCH] acer-wmi: blacklist Thinkpad edge E520
On 10/25/2011 07:13 AM, Dave Jones wrote:
> On Tue, Oct 25, 2011 at 06:22:47AM +0800, joeyli wrote:
> > 於 四,2011-10-13 於 14:51 +0800,Ike Panhc 提到:
> > > BugLink: http://launchpad.net/bugs/836865
> > > BugLink: http://launchpad.net/bugs/826784
> > >
> > > There are reports say that acer-wmi is loaded on Thinkpad E520 which
> > > cause wireless connection hard blocked and we can not unblock it. It
> > > will be better not to load acer-wmi on this machine.
> > >
> > > Signed-off-by: Ike Panhc <ike.pan@canonical.com>
> > > ---
> > > drivers/platform/x86/acer-wmi.c | 7 +++++++
> > > 1 files changed, 7 insertions(+), 0 deletions(-)
> > >
> > > diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> > > index af2bb20..dc9a116 100644
> > > --- a/drivers/platform/x86/acer-wmi.c
> > > +++ b/drivers/platform/x86/acer-wmi.c
> > > @@ -325,6 +325,13 @@ static struct dmi_system_id __devinitdata acer_blacklist[] = {
> > > DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
> > > },
> > > },
> > > + {
> > > + .ident = "Lenovo Thinkpad Edge E520",
> > > + .matches = {
> > > + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> > > + DMI_MATCH(DMI_PRODUCT_NAME, "114320U"),
> > > + },
> > > + },
> > > {}
> > > };
> > >
> >
> > Unfortunately didn't see any useful EC register for unblock wifi rfkill in acer-wmi, let's
> > add this device to blacklist.
> >
> > Signed-off-by: Lee, Chun-Yi <jlee@novell.com>
>
> We've seen similar reports from other Lenovo machines & acer-wmi in Fedora bugzilla.
> https://bugzilla.redhat.com/show_bug.cgi?id=674353 for example has people reporting
> the b450 and V460 also suffer the same issue.
>
> (There are also a bunch of bug reports from the other *-wmi modules on various hardware.
> It seems these modules really upset rfkill).
>
> Dave
>

I've tried to find a way to prevent acer-wmi loaded if VPC2004 found in DSDT. Thinking twice, seems to do this in kernel is not a good idea because if acer-wmi is necessary in one model of ideapads then we need to re-compile kernel for testing. I think it will be better to do this in udev if possible.
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