Hi,
Am 03.03.2017 um 17:42 schrieb Marc Gonzalez:
> I'm confused about early consoles and earlyprintk, and all that good stuff.
> When my kernel panics, I don't get the expected output.
>
> Using "mem=256M ignore_loglevel earlyprintk"
[...]
> [ 0.014325] Console: colour dummy device 80x30
> [ 0.018885] console [tty0] enabled
> [ 0.022396] bootconsole [earlycon0] disabled
>
> And it hangs there.
>
>
> If I use an explicit console= configuration, I do see the panic.
> Using "mem=256M ignore_loglevel console=ttyS0,115200 earlyprintk"
[...]
> [ 0.014325] Console: colour dummy device 80x30
> [ 0.018899] Calibrating delay loop (skipped), value calculated using timer frequency.. 54.25 BogoMIPS (lpj=90000)
[...]
I have reported a similar phenomenon for multiple new SoCs.
> I suppose this is related to my DT description?
>
> chosen {
> stdout-path = "serial:115200n8";
> };
>
> Isn't stdout-path = "serial:115200n8" supposed to be equivalent to
> console=ttyS0,115200 ?
First of all, that should probably be serial0, and it needs to be
defined as an alias. In my case that's a given.
And yes, AFAIU stdout-path = "serialX:115200n8" should lead to
ttyFOOX,115200n8 being used, in your case it may be ttyS0.
Regards,
Andreas
--
SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
