Boot problems with a PA6T board

[Christian Zigotzky <chzigotzky@xenosoft.de>]

On 05.05.2014 07:48, Michael Ellerman wrote:
> On Sun, 2014-05-04 at 18:02 +0200, Christian Zigotzky wrote:
>> Hi All,
>>
>> The RC 1, 2, and 3 of the kernel 3.15 don't boot on my PA6T board with a
>> Radeon HD 6870 graphics card.
>>
>> Screenshot:
>> http://forum.hyperion-entertainment.biz/download/file.php?id=1060&mode=view
>>
>> The kernel 3.14 starts without any problems. Has anyone a tip for me,
>> please?
> The line that says "starting cpu hw idx 0... failed" looks a little worrying.
> Do you see that on 3.14 as well?
>
> Otherwise bisection is probably your best bet.
>
> cheers
Hi All,

I have found out which patch is responsible for the boot problems. It's 
patch 9000c17dc0f9c910267d2661225c9d33a227b27e. Link: 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9000c17dc0f9c910267d2661225c9d33a227b27e

Experimental protocol:

git checkout -f 01d8885785a60ae8f4c37b0ed75bdc96d0fc6a44; git clean -fdx 
(from 02/04/14) -> Kernel boots
git checkout -f f1553174a207f68a4ec19d436003097e0a4dc405; git clean -fdx 
(from 03/04/14) -> Kernel boots
git checkout -f d40326f4b9f9617cdfd30f83a2db57d47e9c5bac; git clean -fdx 
(from 04/04/14) -> Kernel boots
git checkout -f 930b440cd8256f3861bdb0a59d26efaadac7941a; git clean -fdx 
(from 05/04/14) -> doesn't boot (rtc error)
git checkout -f 2b3a8fd735f86ebeb2b9d061054003000c36b654; git clean -fdx 
(from 06/04/14) -> doesn't boot (rtc error)
git checkout -f 26c12d93348f0bda0756aff83f4867d9ae58a5a6; git clean -fdx 
(from 07/04/14) -> doesn't boot (rtc error)
git checkout -f a6c8aff022d4d06e4b41455ae9b2a5d3d503bf76; git clean -fdx 
(from 08/04/14) -> Kernel boots
git checkout -f 035328c202d26a824b8632fd3b00635db5aee5a2; git clean -fdx 
(from 08/04/14) -> Kernel boots
git checkout -f 9000c17dc0f9c910267d2661225c9d33a227b27e; git clean -fdx 
(from 08/04/14) powerpc/powernv: Fix endian issues with sensor code
One OPAL call and one device tree property needed byte swapping. -> 
doesn't boot (prom_init)
git checkout -f d3d35d957a9d0733dc51f14b5abc0bff5d3c5f3a; git clean -fdx 
(from 08/04/14) -> doesn't boot (prom_init)
git checkout -f c4586256f0c440bc2bdb29d2cbb915f0ca785d26; git clean -fdx 
(from 09/04/14) -> doesn't boot (prom_init)

I'm not a programmer but what can I do to solve this boot problem?

Cheers,

Christian