[lkml]   [2013]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: applesmc oops in 3.10/3.11

On Oct 1, 2013, at 9:51 PM, Guenter Roeck <> wrote:

> On Tue, Oct 01, 2013 at 07:09:26PM -0600, Chris Murphy wrote:
>> On Oct 1, 2013, at 10:24 AM, Guenter Roeck <> wrote:
>>> On Tue, Oct 01, 2013 at 09:33:13AM -0600, Chris Murphy wrote:
>>>> On Oct 1, 2013, at 9:19 AM, Guenter Roeck <> wrote:
>>>>> On Tue, Oct 01, 2013 at 12:55:26PM +0200, Henrik Rydberg wrote:
>>>>>>>> Warning message triggered with 3.12.0-0.rc3.git0.1.fc21.x86_64.
>>>>>>>> [ 10.886016] applesmc: key count changed from 261 to 1174405121
>>>>>>> Explains the crash, but the new key count is very wrong. 1174405121 = 0x46000001.
>>>>>>> Which I guess explains the subsequent memory allocation error in the log.
>>>>>>> Henrik, any idea what might be going on ? Is it possible that the previous
>>>>>>> command failure leaves some state machine in a bad state ?
>>>>>> I seem to recall a report on another similar state problem on newer
>>>>>> machines, so maybe, yes. Older machines seem fine, I have never
>>>>>> encountered the problem myself. Here is a patch to test that
>>>>>> theory. It has been tested to be pretty harmless on two different
>>>>>> generations.
>>>>>> I really really do not want to add an 'if (value is insane)' check ;-)
>>>>> Chris,
>>>>> any chance you can load this patch on an affected machine so we can get
>>>>> test feedback ? This one is too experimental to submit upstream without
>>>>> knowing that it really fixes the problem.
>>>> Yes. What source version should I apply it against? I'd use the non-debug config file from an equivalent version Fedora kernel, unless asked otherwise. And also should I test it on other vintages? I have here MBP4,1(2008); MBP8,2(2011), and MBP10,2(2012).
>>> Only requirement is that it also includes the previous patch, so it would be
>>> optimal if you can apply it on top of the previous image.
>> Patch added on top of 3.12.0-0.rc3.git0.1.fc20.x86_64 and built. But after ~dozen reboots, I'm not triggering the problem. The only items in dmesg with smc in it:
>> [ 13.799819] applesmc: key=261 fan=2 temp=14 index=14 acc=1 lux=2 kbd=1
>> [ 13.833402] input: applesmc as /devices/platform/applesmc.768/input/input10
> Hi Chris,
> That only means that you did not hit the problem. There may be some secondary
> trigger (cold boot ? coffee on the cpu ?).
> One thing I have seen in all logs is the earlier "send_byte fail" message, so
> I think that is a pre-requisite.

I have no idea how to trigger it. I have tried cold and warm boots. Boots between linux and OS X to linux. *shrug* I'll keep trying as I'm doing other testing, maybe I'll stumble onto it.


 \ /
  Last update: 2013-10-02 06:21    [W:0.066 / U:0.844 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site