OK. now I am stuck as uas remains blacklisted even after removing the entry in modprobe.d. Why? syslog says: May 24 09:17:49 gserv kernel: [ 2.288977] usb 2-2: UAS is blacklisted for this device, using usb-storage instead Like this I can’t test. Cheers, Christoph > On 22 May 2017, at 14:37, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > > On 22.05.2017 11:48, Christoph Gohle wrote: >> Hey Mathias, >> >> >>> On 19 May 2017, at 09:58, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >>> >>>> >>> >>> 4.11 kernel has xhci traces enabled, could you try to reproduce it with 4.11? >>> xhci traces can be enabled with: >>> >>> echo 1 > /sys/kernel/debug/tracing/events/xhci-hcd/enable >>> >>> If you know how to reliably reproduce this then please enable tracing just before >>> triggering this. It generates a lot of data. >>> >>> -Mathias >> I would be able to do xhci traces with a 4.10 kernel (4.10.0-21-generic #23~16.04.1-Ubuntu SMP). Don’t really want to go to 4.11. . Still interested? > > xhci got more useful tracing support in 4.11, > Sure, you can try if there's something in 4.10 > >> >> Where do these traces go? >> > > mount -t debugfs none /sys/kernel/debug > cat /sys/kernel/debug/tracing/trace > > -Mathias -- Christoph Gohle christoph@xxxxxxxxx
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