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Subject: Re: [FSL P50x0] Xorg always restarts again and again after the the
 PowerPC updates 5.13-1
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
 Michael Ellerman <mpe@ellerman.id.au>
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From: Christian Zigotzky <chzigotzky@xenosoft.de>
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Date: Tue, 4 May 2021 16:52:45 +0200
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Cc: Darren Stevens <darren@stevens-zone.net>,
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Am 04.05.21 um 16:48 schrieb 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 ?
>
I use 32-bit and 64-bit userlands with 64-bit kernels. Both userlands 
are affected by the Xorg issue.