[Letux-kernel] LetuxOS: Kernel: m-latest 5.7-rc1 successful

Stefan Leichter sle85276 at gmx.de
Sat Apr 18 23:06:27 CEST 2020


Hello Nikolaus,

I managed to reproduce the panic and got logging in /var/log folder
again. May I was not patient enough.

My Pandora did not show anything on the screen, and I had to remove the
battery to get control back.

Maybe the content of Xorg.0.log is from interest. The file ends with:

[    24.294] (II) OMAP: Driver for TI OMAP: OMAP3430 with PowerVR SGX530,
         OMAP3630 with PowerVR SGX530, OMAP4430 with PowerVR SGX540,
         OMAP4460 with PowerVR SGX540, OMAP5430 with PowerVR SGX544 MP,
         OMAP5432 with PowerVR SGX544 MP
[    24.294] (++) using VT number 7

[    24.296] (II) OMAP(0): Creating default Display subsection in Screen
section
         "Screen 0" for depth/fbbpp 24/32
[    24.296] (==) OMAP(0): Depth 24, (==) framebuffer bpp 32
[    24.296] (==) OMAP(0): RGB weight 888
[    24.296] (==) OMAP(0): Using gamma correction (1.0, 1.0, 1.0)
[    24.296] (==) OMAP(0): Default visual is TrueColor
[    24.339] (EE) OMAP(0): ERROR: Could not read chipset
[    24.340] (II) UnloadModule: "omap"
[    24.340] (EE) Screen(s) found, but none have a usable configuration.
[    24.346] (EE)
Fatal server error:
[    24.346] (EE) no screens found(EE)
[    24.346] (EE)
Please consult the The X.Org Foundation support
          at http://wiki.x.org
  for help.
[    24.346] (EE) Please also check the log file at
"/var/log/Xorg.0.log" for additional information.
[    24.346] (EE)
[    24.347] (EE) Server terminated with error (1). Closing log file.

Regards Stefan



Am 18.04.20 um 10:58 schrieb H. Nikolaus Schaller:
> Hi Stefan,
>
>> Am 18.04.2020 um 09:48 schrieb Stefan Leichter <sle85276 at gmx.de>:
>>
>> Hello Nikolaus,
>>
>> The kernel dump I posted was from the kernel on your download page.
>>
>> My self-build kernel doesn't generate anything in /var/log folder.
>> Therefore I assume the kernel still panics.
>>
>> I have no serial debugging option here (at least I don't know about any).
>
> Well, I am working on a solution for that problem. I.e. a tiny adapter
> for an USB cable that you can plug into the audio/tv-out socket of the
> Pandora.
>
>>
>> To get the kernel source build I had to apply the attached patch on top
>> of letux-5.7-rc1
>
> Ok, I'll have to take a look for that.
>
>> and the patch
>> (https://patchwork.kernel.org/series/268431/mbox/). Maybe I screwed
>> something up.
>
> The biggest source of trouble with a self-built kernel may be
> installation on the SD card. The complied .dtb files and modules
> should also be installed to match the uImage.
>
> Anyways, I have looked into the
>
>> [   33.765747] WARNING: CPU: 0 PID: 2116 at drivers/base/dd.c:270 driver_deferred_probe_check_state+0x44/0x5c
>
> problem.
>
> The real reason is
>
> [   33.166473] omap3isp 480bc000.isp: deferred probe timeout, ignoring dependency
>
> which means that something required by the image signal processor (camera
> interface) inside the omap3 chip is not becoming available. May be some
> clock or gpio.
>
> Generally this should not be harmful and just make the GTA04 camera inoperational
> (the OpenPandora hasn't one). But it may have unexpected side-effects.
>
> BR,
> Nikolaus
>



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