Re: [ARMini-support] arrested shutdown sequence

  • From: Colin Granville <colin.granville@xxxxxxxxx>
  • To: armini-support@xxxxxxxxxxxxx
  • Date: Sat, 1 Apr 2017 09:19:47 +0100

On 01/04/2017 01:11, Jim Nagel wrote:

Thread about arrested boot sequence has run long.
I wonder if arrested shutdown sequence is in any way related.
I think I'm not the only ArmX6 user who gets this mysterious hang.

Arrested shutdown -- the machine hanging before getting to the
standard "OK, switch off now" message -- is not quite so bothersome as
the arrested startup, because the cure is simply to switch off, done.

But why does it happen?  Ctrl-Shift-F12, windows close, open files
warn, task manager quits, keyboard and mouse dead -- and the rest of
the screen is still there.  Switch off, no harm done, but seems wrong:
what is causing it to hang, half-alive?
(Parental warning: gruesome metaphor)


My guess is that it is hanging when closing a USB device - possibly a printer. If it always/usually happens you may be able to track down which device is causing the problem - not that it helps.

If the USB device driver is Fileswitch based, fileswitch flushes the buffers before closing the device and if for some reason the device can't consume any data in the buffers fileswitch just waits forever.

This can be a problem for usb serial devices which use handshaking.

--
Colin
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