RTC anti-rollback testing

[Esteban Bordón]

I've tried in 2 XO 1.0 and I have the same behaviour in both laptops.
For each boot, the laptop repeats steps b and c, then, laptop powers off. If
XO have "rt" tag will never boot.

2011/10/14 Mitch Bradley <wmb at laptop.org>

>  The most likely explanation is that OFW had to power off in order to
> re-enable writing to the SPI FLASH.  That can happen if the last reboot was
> from Linux.  See http://dev.laptop.org/ticket/4397
>
> Unless that bug is fixed, the process will be:
>
> a) Linux reboots
> b) OFW runs rtc-rollback? and tries to write the new timestamp SPI FLASH
> c) OFW is unable to perform the write because SPI FLASH is locked
> d) OFW reboots, using the EC command that unlocks SPI FLASH
> e) OFW runs rtc-rollback? and sucessfully writes the new timestamp'
>
> The net result is that reboots will take slightly longer when anti-rollback
> is enabled.
>
>
> On 10/14/2011 2:53 AM, Esteban Bordón wrote:
>
> 2011/10/11 Esteban Bordón <ebordon at plan.ceibal.edu.uy>
>
>> Hi all,
>>
>> I'm trying to test the RTCAR including on OFW Q2E46 by following the steps
>> indicated in
>> http://wiki.laptop.org/go/RTC_Anti-rollback#Testing_Rollback_Detection.
>>
>> I added the "rt" tag, but when I run command
>>
>> ok rtc-rollback? .the laptop powers off.
>>
>>
>>
>> Is it a normal behaviour?
>>
>> cheers,Esteban
>>
>>
>>
>
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