Hi again, >> >> I already have earlyprintk enabled: >> >> CONFIG_DEBUG_LL=y >> CONFIG_DEBUG_AM33XXUART1=y >> CONFIG_EARLY_PRINTK=y > Try to add earlyprintk to kernel commandline (look at > Documentation/kernel-parameters.txt) That did it! I thought earlyprintk was enabled by default if it was included in the kernel. Now I get console output, up until the point where earlyprintk is to be replaced with the normal console (as far as I understand). These are now the last few lines before it goes silent: [ 0.894608] omap_voltage_late_init: Voltage driver support not added [ 0.901653] ThumbEE CPU extension supported. [ 0.906201] Registering SWP/SWPB emulation handler [ 0.912028] bootconsole [earlycon0] disabled Earlier in the log I noted some problem with the UART which I guess may be the problem: [ 0.617639] omap_uart 44e09000.serial: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_uart0, deferring probe [ 0.631182] omap_uart 48022000.serial: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_uart1_pins, deferring probe Seems lika a device tree problem to me…? I’m using the device tree of a very similar, but not exactly the same base board as the on that I use. The core module including the CPU are exactly the same. So I thought at least UART should not be a problem. And ideas? Btw, here is the first part of the log in case it makes any difference: ommandline: consoleblank=0 console=ttyO0,115200n8 earlyprintk=serial,ttyO0,115200 root=/dev/mmcblk0p2 rootwait rw [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.4.0-yocto-standard (jonatan@babbage) (gcc version 4.9.2 (GCC) ) #1 Thu Feb 18 10:54:44 CET 2016 [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine model: Phytec AM335x phyBOARD-WEGA [ 0.000000] bootconsole [earlycon0] enabled [ 0.000000] Memory policy: Data cache writeback [ 0.000000] CPU: All CPU(s) started in SVC mode. [ 0.000000] AM335X ES2.1 (sgx neon ) [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129536 [ 0.000000] Kernel command line: consoleblank=0 console=ttyO0,115200n8 earlyprintk=serial,ttyO0,115200 root=/dev/mmcblk0p2 rootwait rw [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Memory: 508680K/522240K available (6047K kernel code, 422K rwdata, 1844K rodata, 312K init, 164K bss, 13560K reserved, 0K cma-reserved, 0K highmem) Regards, Jonatan Magnusson -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
