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Bug#794266: New Workaround

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  Bug#794266: New Workaround Manuel Roeder <manuel_roeder@gmx.de> - 2016-04-27 21:00 +0200
    Bug#794266: New Workaround Uwe Kleine-König <ukleinek@debian.org> - 2016-05-01 16:00 +0200

#53805 — Bug#794266: New Workaround

- if you see
  [    2.261416] rtc rtc0: invalid alarm value: 1900-1-29 1193038:40:16
  when checking the kernel-log

- unbind the rtc-driver
  echo 0-0030 > /sys/bus/i2c/devices/0-0030/driver/unbind

- The following command ist needed for sure !!! other ways it wont work

  i2cget 0 0x30 1

- issue a reboot

  reboot

- after reboot check again for
  [    2.261416] rtc rtc0: invalid alarm value: 1900-1-29 1193038:40:16

  ... it should be gone!!!
  ... if not start from the beginning !

- if the error message is gone you should be able to
  power the machine down now

  poweroff

- powerdown will work normal again until the alarm is set wrong
  again

Manuel

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#53874

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Hello Manuel,

thanks for documenting your findings.

On Wed, Apr 27, 2016 at 08:55:13PM +0200, Manuel Roeder wrote:
> - if you see
>   [    2.261416] rtc rtc0: invalid alarm value: 1900-1-29 1193038:40:16
>   when checking the kernel-log
> 
> - unbind the rtc-driver
>   echo 0-0030 > /sys/bus/i2c/devices/0-0030/driver/unbind
> 
> - The following command ist needed for sure !!! other ways it wont work
> 
>   i2cget 0 0x30 1

To finally understand the problem can somebody with the problem please
issue to following commands on his/her machine:

	dmesg -c > /dev/null
	echo 0-0030 > /sys/bus/i2c/devices/0-0030/driver/unbind
	echo 1 > /sys/kernel/debug/tracing/events/i2c/enable
	echo 0-0030 > /sys/bus/i2c/drivers/rtc-s35390a/bind
	echo 0-0030 > /sys/bus/i2c/devices/0-0030/driver/unbind
	i2cget 0 0x30 1
	echo 0-0030 > /sys/bus/i2c/drivers/rtc-s35390a/bind
	dmesg
	cat /sys/kernel/debug/tracing/trace

and then please provide the output generated by the commands above.

Thanks
Uwe

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