[FSL P50x0] Xorg always restarts again and again after the the PowerPC updates 5.13-1

[Christophe Leroy]

Le 04/05/2021 à 15:48, Christian Zigotzky a écrit :
> Am 04.05.21 um 13:02 schrieb Christian Zigotzky:
>> Am 04.05.21 um 12:07 schrieb Christian Zigotzky:
>>> Am 04.05.21 um 11:49 schrieb Christophe Leroy:
>>>>
>>>>
>>>> Le 04/05/2021 à 11:46, Christian Zigotzky a écrit :
>>>>> Am 04.05.21 um 11:11 schrieb Christophe Leroy:
>>>>>>
>>>>>>
>>>>>> Le 04/05/2021 à 11:09, Christian Zigotzky a écrit :
>>>>>>> Am 04.05.21 um 10:58 schrieb Christophe Leroy:
>>>>>>>>
>>>>>>>>
>>>>>>>> Le 04/05/2021 à 10:29, Christian Zigotzky a écrit :
>>>>>>>>> On 04 May 2021 at 09:47am, Christophe Leroy wrote:
>>>>>>>>>> Hi
>>>>>>>>>>
>>>>>>>>>> Le 04/05/2021 à 09:21, Christian Zigotzky a écrit :
>>>>>>>>>>> Hi Christophe,
>>>>>>>>>>>
>>>>>>>>>>> Thanks for your answer but I think I don't know how it works with the cherry-pick.
>>>>>>>>>>>
>>>>>>>>>>> $ git bisect start
>>>>>>>>>>
>>>>>>>>>> As you suspect the problem to be specific to powerpc, I can do
>>>>>>>>>>
>>>>>>>>>> git bisect start -- arch/powerpc
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> $ git bisect good 68a32ba14177d4a21c4a9a941cf1d7aea86d436f
>>>>>>>>>>> $ git bisect bad c70a4be130de333ea079c59da41cc959712bb01c
>>>>>>>>>>
>>>>>>>>>> You said that powerpc-5.13-1 is bad so you can narrow the search I think:
>>>>>>>>>>
>>>>>>>>>> git bisect bad powerpc-5.13-1
>>>>>>>>>> git bisect good 887f3ceb51cd3~
>>>>>>>>> I tried it but without any success.
>>>>>>>>>
>>>>>>>>> git bisect bad powerpc-5.13-1
>>>>>>>>>
>>>>>>>>> Output:
>>>>>>>>> fatal: Needed a single revision
>>>>>>>>> Bad rev input: powerpc-5.13-1
>>>>>>>>
>>>>>>>> I don't understand, on my side it works. Maybe a difference between your version of git and 
>>>>>>>> mine.
>>>>>>>>
>>>>>>>> In that case, just use the SHA corresponding to the merge:
>>>>>>>>
>>>>>>>> git bisect bad c70a4be130de333ea079c59da41cc959712bb01c
>>>>>>>>
>>>>>>>> Christophe
>>>>>>> Do you use a BookE machine?
>>>>>>
>>>>>> No I don't unfortunately, and I have tried booting in QEMU a kernel built with your config, 
>>>>>> but it freezes before any output.
>>>>> You can use my kernels and distributions.
>>>>>
>>>>
>>>> Ok, I'll see if I can do something with them.
>>>>
>>>> In the meantime, have you been able to bisect ?
>>>>
>>>> Thanks
>>>> Christophe
>>> I am bisecting currently.
>>>
>>> $ git bisect start -- arch/powerpc
>>> $ git bisect good 887f3ceb51cd3~
>>> $ git bisect bad c70a4be130de333ea079c59da41cc959712bb01c
>> OK, there is another issue after the second bisecting step. The boot stops after loading the dtb 
>> and uImage file. I can't solve 2 issues with bisecting at the same time.
> Xorg restarts again and again.
> 
> Here are some interesting error messages:
> 
> May 04 15:24:53 dc1.a-eon.tld kernel: lxsession[7255]: segfault (11) at 800000 nip ff6a770 lr 
> ff6a760 code 1 in libglib-2.0.so.0.4800.2[feaf000+11f000]
> May 04 15:24:53 dc1.a-eon.tld kernel: lxsession[7255]: code: 4bfc9401 3920ffff 91210054 8061005c 
> 2f830000 419c0014 38800000 4bfc93e5
> May 04 15:24:53 dc1.a-eon.tld kernel: lxsession[7255]: code: 3920ffff 9121005c 2f8f0000 419e0008 
> <93ef0000> 418e000c 81210040 913b0000
> 
> May 04 15:37:40 mintppc.a-eon.tld kernel: packagekitd[4290]: segfault (11) at 8 nip 92dbc8 lr 92dae8 
> code 1 in packagekitd[920000+51000]
> May 04 15:37:40 mintppc.a-eon.tld kernel: packagekitd[4290]: code: 38800080 3be001f4 4cc63182 
> 4802c8ad 4bffff64 60000000 81210018 80be8048
> May 04 15:37:40 mintppc.a-eon.tld kernel: packagekitd[4290]: code: 7fa6eb78 38800010 807e801c 
> 3be0ffff <80e90008> 4cc63182 4802c881 4bffff38

Yes it shows you get a segfault for some reason.
So yes, 887f3ceb51cd3 could have been the reason but 525642624783 fixes it already.

Therefore I think a proper bisect is needed to identify the culprit commit to understand the reason 
and fix it.

You are running a 32 bits userspace on a 64 bits kernel ?