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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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