How do I view logs from within pm_power_off function
by jgrebe from LinuxQuestions.org on (#6NS4K)
I have written a kernel power down module that overrides the pm_power_off function.
However, I cannot see any logs that I put into pm_power_off function. I have tried using printk(), pr_info(), pr_alert(), WARN_ON(1), etc...
Then I poweroff the system, and on next boot I use "journalctl -k -b -1" to view the kernel logs from the last boot and I don't see anything there.
I have set /proc/sys/kernel/printk to "8 4 1 3"
I see logs from my kernel module init() function. I know that the function is being called because the function modifies GPIO levels that I am probing on oscilloscope.
How can I view logs from pm_power_off function?
However, I cannot see any logs that I put into pm_power_off function. I have tried using printk(), pr_info(), pr_alert(), WARN_ON(1), etc...
Then I poweroff the system, and on next boot I use "journalctl -k -b -1" to view the kernel logs from the last boot and I don't see anything there.
I have set /proc/sys/kernel/printk to "8 4 1 3"
I see logs from my kernel module init() function. I know that the function is being called because the function modifies GPIO levels that I am probing on oscilloscope.
How can I view logs from pm_power_off function?