On 07/15/2016 03:20 PM, Krzysztof Kozlowski wrote:
> On 07/15/2016 03:15 PM, Tobias Jakobi wrote:
>> Hey,
>>
>> Krzysztof Kozlowski wrote:
>>> On 07/15/2016 09:55 AM, Krzysztof Kozlowski wrote:
>>>>>> Nicolas Dufresne wrote:
>>>>>>> Le jeudi 14 juillet 2016 à 15:37 -0400, Nicolas Dufresne a écrit :
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I'm using the Odroid U2 to test some features implemented in
>>>>>>>> GStreamer.
>>>>>>>> The parts I need mostly works in mainline kernel, my main
>>>>>>>> annoyance
>>>>>>>> ist
>>>>>>>> that reboot hangs.
>>>>>>>>
>>>>>>>> Is this issue known ? I'm booting from SD card is that matters.
>>>>>>>> Any
>>>>>>>> advise would be appreciated. I'm not list member, so please keep
>>>>>>>> me
>>>>>>>> in
>>>>>>>> CC. I'm sharing my .config, in case that is my fault.
>>>>
>>>> First of all - use just command "reboot" to restart. It should work. If
>>>> it doesn't, please let us now.
>>>>
>>>> I was able to reproduce your issue - OOPS in emergency restart - also in
>>>> my configuration (U3 + eMMC + network boot).
>>>>
>>>> It is weird... I'll take a look at it.
>>>
>>> Actually I did not encounter OOPS of yours. I was able to reproduce a
>>> failure to reboot on U3. XU3 reboots fine. It might be related to pwrseq...
>> I'm not sure how much that helps, but I can't reproduce any of this on
>> my X2 (which is quite closely related to the U2/U3).
>
> You mean sysrq reboot works fine?
BTW, I bisected this to merge commit appearing in v4.3 merge window,
bringing in cpufreq-dt to Exynos4412. There was a reboot issue related
to cpufreq frequency and voltage. Bartlomiej fixed it in 1605b60ad064
("ARM: dts: add suspend opp to exynos4412"). However the opp-suspend and
cpufreq-suspend are activated through syscore shutdown.
Unfortunately it seems that syscore shutdown is not called during
emergency reboot.
It looks like more generic problem.
Best regards,
Krzysztof
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