Hi Julia, On Tuesday 21 August 2018 07:12 PM, Julia Cartwright wrote: > That's annoying. When you are in this state can you trigger a dump via > the magic sysrq sequence over serial? No. I'm not able to trigger a crash using sysrq (Alt+SysRq+c). Keyboard 'caps lock' led light does not respond when caps lock key is pressed. Does it indicate a softlockup or hardlockup ? > Have you tried enabling the various lockup detectors? There is a > software-driven one, and an NMI watchdog based one. Enabling both > at the same time should be fine. The below config options are enabled, CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y # Debug Lockups and Hangs CONFIG_LOCKUP_DETECTOR=y CONFIG_SOFTLOCKUP_DETECTOR=y CONFIG_HARDLOCKUP_DETECTOR_PERF=y CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y CONFIG_HARDLOCKUP_DETECTOR=y # CONFIG_BOOTPARAM_HARDLOCKUP_PANIC is not set CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=0 # CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0 CONFIG_HAVE_NMI=y CONFIG_HAVE_PERF_EVENTS_NMI=y CONFIG_BOOTPARAM_HARDLOCKUP_PANIC and CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is enabled using, echo 1 > /proc/sys/kernel/softlockup_panic echo 1 > /proc/sys/kernel/hardlockup_panic In addition to this the below parameters were set, echo 1 > /proc/sys/kernel/hung_task_panic echo 1 > /proc/sys/kernel/panic echo 1 > /proc/sys/kernel/panic_on_io_nmi echo 1 > /proc/sys/kernel/panic_on_oops echo 1 > /proc/sys/kernel/panic_on_unrecovered_nmi echo 1 > /proc/sys/kernel/unknown_nmi_panic echo 1 > /proc/sys/vm/panic_on_oom echo 1 > /proc/sys/kernel/sysrq Thanks. Regards, Vignesh
