Messages in this thread | | | From | Nathan Royce <> | Date | Sun, 6 Jan 2019 13:33:09 -0600 | Subject | Re: kernel: xhci_hcd 0000:00:14.0: ERROR unknown event type 37 - Kernel 4.19.13 |
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I'm only posting to say I'm still waiting... The error came up while I slept, and when I copied that log and looked at it (yes, it WAS huge, just as you said), the timestamps at the head/tail were much later than the journal logged times. So I made a little script to monitor the journal kernel entries for that message and have it copy the file after maybe 5 seconds. And now, I'm just waiting for that error to occur again.
On Wed, Jan 2, 2019 at 5:32 AM Mathias Nyman <mathias.nyman@linux.intel.com> wrote: > > The event type 37 is a host controller event, most likely a event ring full error. > > So there are probably so many events that we fill the event ring before we can handle them. > > Could you take traces of this? > Note that the trace file will be huge. > > 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 > > copy the traces somewhere safe once the error is triggered: > cp /sys/kernel/debug/tracing/trace /<somewhere> > > -Mathias
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