Difference between revisions of "Armadeus 7.0 Troubleshots"

Revision as of 11:04, 30 July 2019

Due to NXP specifications changes, 4.17 kernel seems to have some problems when using CPU frequency scaling and/or i.MX6ULL at full speed (900MHz). Consequences are random kernel crashes with stack overflow/memory problems. For these reasons we recommend everyone using this kernel/release and i.MX6ULL to add a patch in patches/linux/4.17/.

This patch can be found in latest git tree:

   https://sourceforge.net/p/armadeus/code/ci/master/tree/patches/linux/4.17/0112-ARM-dts-imx6ull-update-vdd_soc-voltage-for-900MHz-op.patch

Then we also recommend to de-activate CPU frequency scaling on i.MX6ULL and fix operating frequency (to put somewhere in your app starting script, here frequency is fixed to 900MHz):

   cd /sys/devices/system/cpu/cpu0/cpufreq/
   echo userspace > scaling_governor
   echo 900000 > scaling_setspeed

@@ Line 1: / Line 1: @@
 ==4.17 kernels random crashes==
-* 4.17 kernel seems to have some problems when using CPU frequency scaling and/or i.MX6ULL at full speed (900MHz). Consequences are random kernel crashes with stack overflow/memory problems. For these reasons we recommend everyone using this kernel/release and i.MX6ULL to add a patch in ''patches/linux/4.17/''.
+* Due to NXP specifications changes, 4.17 kernel seems to have some problems when using CPU frequency scaling and/or i.MX6ULL at full speed (900MHz). Consequences are random kernel crashes with stack overflow/memory problems. For these reasons we recommend everyone using this kernel/release and i.MX6ULL to add a patch in ''patches/linux/4.17/''.
 This patch can be found in latest git tree:
      https://sourceforge.net/p/armadeus/code/ci/master/tree/patches/linux/4.17/0112-ARM-dts-imx6ull-update-vdd_soc-voltage-for-900MHz-op.patch