ubuntu-phone team mailing list archive

[Petr Bláha <pb@xxxxxxxx>]

Hi Joey,

As you can know, I am working on HP Touchpad.But I am still unable to
compile working base image for daily prebuilds not for quantal nor raring.
My builds works with  MWC demo image only.

Daily prebuilds finishes in Black Screen with ADB working. While
investigating I have discovered that this happened while upgrading
platform-api and libhybris.I do not know what happened during this upgarde.

Last Sunday I made some debugging with next results:

1) my ubuntuappmanager dies

F/libc    (  142): Fatal signal 11 (SIGSEGV) at 0x2ac83494 (code=2), thread
142 (ubuntuappmanage)

2) caused by libcutils.so

I/DEBUG   (  136): backtrace:
I/DEBUG   (  136):     #00  pc 00005274  /system/lib/libcutils.so
(android_atomic_add+24)
I/DEBUG   (  136):     #01  pc 00005268  /system/lib/libcutils.so
(android_atomic_add+12)

3) when checking source code I can discover

00005270 <android_atomic_acquire_store>
:
    5270:       e5810000        str     r0, [r1]
    5274:       eaffffef        b       5238 <android_memory_barrier>

and

0000525c <android_atomic_release_load>:
    525c:       e92d4010        push    {r4, lr}
    5260:       e1a04000        mov     r4, r0
    5264:       ebfffff3        bl      5238 <android_memory_barrier>
    5268:       e5940000        ldr     r0, [r4]
    526c:       e8bd8010        pop     {r4, pc}

I am using 2.6.35 kernel as there is no newer version for HP Touchpad.

In genereal, I think there must be something wrong with mentioned parts
(api and hybris). Maybe I am missing some compile oprtions or some kernel
options? In worst case this could not work with my kernel version.

I saw in mailing list you have same problem. Please keep in mind you need
big partition for quantal/rarring image. I had 1.5GB and this was not
enough. So I made it bigger = 3.5GB now.

At this time I am not able to get you some glue to solvet this problem :-(

Regards Petr


2013/4/23 Joey Carlini <moocow1452@xxxxxxxxx>

> Did you ever get your black screen boot fixed? I've built it for encore,
> but still have trouble with debugging, and could use any link or cheat
> sheet you could send my way.
>
>
> On Mon, Apr 8, 2013 at 9:33 AM, Petr Bláha <pb@xxxxxxxx> wrote:
>
>> My fault, missed erase /data partition. Sorry for disturbing.
>>
>> But still persists BOOT in BLACK SCREEN. This is same as with my Toshiba
>> AC100. I feel so hopeless...
>>
>>
>> 2013/4/8 Petr Bláha <pb@xxxxxxxx>
>>
>>> Hi all,
>>>
>>> I think I am doing some stupid error but I am not able to boot daily
>>> images. While using MWC Demo HP Touchpad boots without any problem.
>>>
>>> When using daily image device boots ( showing boot logo ) and power-off.
>>> I have checked versions of ubuntu libs : ubuntu/platform-api is 46 and ubuntu/hybris
>>> is 123.
>>>
>>> As device crashes on very beggining of boot I have no ADB to get any
>>> logcat or dmesg messages.
>>>
>>> Does anybody know what to do?
>>>
>>> --
>>> Thank you in advance
>>>
>>> Petr Bláha
>>>
>>
>>
>>
>> --
>>
>> Petr Bláha
>>
>> --
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>>
>>
>


-- 

Petr Bláha