On 2018-03-27 13:20, Mathias Nyman wrote:
Could you enable xhci traces with 4.14 or later, and send me the
output:
mount -t debugfs none /sys/kernel/debug
echo 81920 > /sys/kernel/debug/tracing/buffer_size_kb
echo 1 > /sys/kernel/debug/tracing/events/xhci-hcd/enable
Then send me the /sys/kernel/debug/tracing/trace file after issue is
triggered
If it has been tracing for hours without triggering, the trace could be
cleared every now and then with:
echo 0 > /sys/kernel/debug/tracing/trace
-Mathias
I would guess it requires at least ftrace_dump_on_oops=1 as one is
unable
to obtain /sys/kernel/debug/tracing/trace after panic (and I'm using
netconsole as nothing gets written to my lvm luks ssd disk after panic).
Maybe also hung_task_panic=0 is required but trying first without.
I will come back to this issue asap.
--
Juho
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