On Oct 1, 2013, at 10:24 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > On Tue, Oct 01, 2013 at 09:33:13AM -0600, Chris Murphy wrote: >> >> On Oct 1, 2013, at 9:19 AM, Guenter Roeck <linux@xxxxxxxxxxxx> 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 kernel.org 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 Chris _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
