linux-kernel - Re: [PATCH] acer-wmi: blacklist Thinkpad edge E520

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Date:	Tue, 18 Oct 2011 10:20:18 +0800
From:	Ike Panhc <ike.pan@...onical.com>
To:	joeyli <jlee@...e.com>
CC:	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	Matthew Garrett <mjg@...hat.com>, Joey Lee <jlee@...ell.com>
Subject: Re: [PATCH] acer-wmi: blacklist Thinkpad edge E520

Hi Joey,

On 10/18/2011 09:48 AM, joeyli wrote:
> Hi Ike, 
> 
> Could you please attached on the "rfkill list" output when press Fn key?
> Then we can check the rfkill status change.

The output of rfkill list is at
  https://launchpadlibrarian.net/78485925/RfKill.txt

.. and bug reporter tells me that he can not unblock wireless.
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836865/comments/0

> 
> And, 
> Thinkpad E520 have AMW0 method and I thought acer-wmi query wrong EC
> register address so your acer-wireless was always soft-blocked.
> 
> Does it possible kindly help me to find out which register on E520 is
> mapping to wireless status? Please reference to Carlos's acer_ec.pl
> tool:
> 
> http://code.google.com/p/aceracpi/wiki/EmbeddedController
> 
> Simple use:
>         watch -n 1 perl acer_ec.pl regs
> 
> Then press your wireless Fn key to monitor which register changed when
> you press Fn key:
> 
> e.g. the register at row B0 and column 0A is register 0xBA (0x is used
> to indicate this is a hexadecimal number).
> 
> There maybe have other EC register changing when you press key, please
> do a couple of times and make sure you find out the right one.
> 
> If we are lucky, we can find out one EC register mapping to your
> wireless state.

I've asked bug reporter to do so. Unfortunately nothing useful found.

Please refer to the link below:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836865/comments/13
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836865/comments/14

The full discussion is at
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836865

> 
> 
> Thank's
> Joey Lee
> 
> 於 五，2011-10-14 於 10:48 +0800，Ike Panhc 提到：
>> Hi Joey,
>>
>> Here you are.
>>
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836865/+attachment/2330828/+files/AcpiTables.txt
>>
>>
>> On 10/14/2011 12:35 AM, joeyli wrote:
>>> Hi Ike, 
>>>
>>> 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@...onical.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"),
>>>> +		},
>>>> +	},
>>>>  	{}
>>>>  };
>>>>  
>>>
>>> Could you please share Thinkpad edge E520's acpidump and dmidecode log
>>> to me? 
>>> Maybe we can capture how does it works with EC register like we support
>>> Ideapad S205 in acer-wmi driver.
>>>
>>> Add a machine to blacklist is a last resort, I don't want to accept it
>>> before we try.
>>>
>>>
>>> Thank's a lot!
>>> Joey Lee
>>>
>>>
>>> --
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>>
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> 
> 
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