Hi Sebastian, 2016-07-27 11:17 GMT+09:00 Sebastian Reichel <sre@xxxxxxxxxx>: > Hi, > > On Wed, Jul 27, 2016 at 10:23:09AM +0900, Masahiro Yamada wrote: >> When the kernel fails to boot and its log console is silent, >> I use earlycon and I often find the cause of error with it. >> >> But, I have been wondering if there is an easy-to-use >> debug tip which is available after earlycon is disabled. >> >> I noticed the current mainline would not boot on my ARMv8 board. >> According to the following log, I am guessing something wrong >> is happening after the "bootconsole [uniphier0] disabled" log. >> >> Is there a good practice to see more log? > > Documentation/kernel-parameters.txt > keep_bootcon [KNL] > Do not unregister boot console at start. This is only > useful for debugging when something happens in the window > between unregistering the boot console and initializing > the real console. I did not know this kernel parameter, and it is exactly what I wanted. Thanks a lot! -- Best Regards Masahiro Yamada -- 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
