linux-kernel - RE: Dell Studio 1555 eject key does not work ( small patch to fix included )

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Date:	Tue, 8 Jun 2010 11:33:39 -0500
From:	<Rezwanul_Kabir@...l.com>
To:	<pharon@...il.com>
CC:	<mjg59@...f.ucam.org>, <linux-kernel@...r.kernel.org>,
	<platform-driver-x86@...r.kernel.org>, <akpm@...ux-foundation.org>
Subject: RE: Dell Studio 1555 eject key does not work ( small patch to fix
 	included )

Hi Islam Amer

    I have asked feedback from the BIOS team and will update this thread as soon as I get it.
    Thanks..
       --rez



Rezwanul Kabir
Dell Linux Development
512-725-0766
 

>-----Original Message-----
>From: Islam Amer [mailto:pharon@...il.com] 
>Sent: Tuesday, June 08, 2010 5:58 AM
>To: Kabir, Rezwanul
>Cc: mjg59@...f.ucam.org; linux-kernel@...r.kernel.org; 
>platform-driver-x86@...r.kernel.org; akpm@...ux-foundation.org
>Subject: Re: Dell Studio 1555 eject key does not work ( small 
>patch to fix included )
>
>Dear Rezwanul,
>
>I have been using this fix for quite some time without any 
>visible ill effects on the other keys or the system in general.
>Of course it would be necessary to get feedback from other dell users.
>
>Thanks.
>
>On Thu, Jun 3, 2010 at 11:16 PM, Islam Amer <pharon@...il.com> wrote:
>> Hello,
>>
>> I suspected the same about dell_new_hk_type, but I am confused that 
>> the rest of the fn keys work just fine out of the box. The 
>only button 
>> that didn't work was the eject key.
>>
>> Attached is the dmidecode output.
>>
>> Thanks
>>
>> On Thu, Jun 3, 2010 at 5:57 AM,  <Rezwanul_Kabir@...l.com> wrote:
>>>
>>>>Hi Rez,
>>>>
>>>>Any thoughts on this?
>>>>
>>>
>>>
>>>  From the discussion below, it seems that this system does not 
>>> implement the new WMI scheme ( which is when 
>dell_new_hk_type=true is 
>>> set). So, at issue here is the legacy code. Without knowing exactly 
>>> why BIOS would behave differently in this particular case, 
>the fix seems arbitrary. Let me see if I can get hold of the 
>BIOS developer(if possible) and provide feedback in this thread.
>>>
>>> Islam Amer
>>>
>>>   Can you attach dmidecode output from the system here?
>>>
>>> Thanks..
>>>   --rez
>>>
>>>
>>>
>>>
>>>
>>>>On Thu, Jun 03, 2010 at 01:14:09AM +0400, Islam Amer wrote
>>>>> Hello,
>>>>>
>>>>> Pressing the eject key on my Dell Studio 1555 does not work
>>>>and dmesg
>>>>> produces this message :
>>>>> dell-wmi: Unknown key 0 pressed
>>>>>
>>>>> Adding a debugging printk in dell-wmi.c after line 222 like this :
>>>>>
>>>>> printk(KERN_INFO "dell:wmi 0x%x , 0x%x \n", buffer_entry[1], 
>>>>> buffer_entry[2]);
>>>>>
>>>>> dmesg now shows :
>>>>>
>>>>> dell:wmi 0x0 , 0xe009
>>>>> dell-wmi: Unknown key 0 pressed
>>>>>
>>>>> So for some reason buffer_entry[1] is used although it is empty.
>>>>>
>>>>> Falling back to buffer_entry[2] in case buffer_entry[1] is 0x0 
>>>>> makes the button work.
>>>>>
>>>>> I suspect it might be better to fix the "dell_new_hk_type" logic 
>>>>> though
>>>>>
>>>>> I had submitted this as
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=16075 but 
>repeating the 
>>>>> information and patch here as per Andrew Morton's suggestion.
>>>>>
>>>>>
>>>>> Thanks.
>>>>>
>>>>> ---
>>>>linux-sidux-2.6-2.6.34/drivers/platform/x86/dell-wmi.c.orig
>>>>2010-06-03
>>>>> 01:02:17.418824168 +0400
>>>>> +++ linux-sidux-2.6-2.6.34/drivers/platform/x86/dell-wmi.c
>>>>2010-06-03
>>>>> 01:01:40.641833249 +0400
>>>>> @@ -221,7 +221,7 @@ static void dell_wmi_notify(u32 value, v
>>>>>                      return;
>>>>>              }
>>>>>
>>>>> -            if (dell_new_hk_type)
>>>>> +            if (dell_new_hk_type || buffer_entry[1] == 0x0)
>>>>>                      reported_key = (int)buffer_entry[2];
>>>>>              else
>>>>>                      reported_key = (int)buffer_entry[1] & 0xffff;
>>>>>
>>>>--
>>>>Matthew Garrett | mjg59@...f.ucam.org
>>>>
>>
>--
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