[Bug 7526] fixme:comm:set_queue_size insize 4096 outsize 4096 unimplemented stub

http://bugs.winehq.org/show_bug.cgi?id=7526

Bernie Innocenti  changed:

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--- Comment #12 from Bernie Innocenti   2009-06-10 09:01:20 ---
Confirmed on 1.0,1 and 1.1.21.  Please, reopen this bug.

Happens to me with a Visual Basic program using MSCOMM32.OCX, but only on an
embedded board with a slow processor.  It doesn't happen on my laptop, and it
seems unrelated to USB.

Both wineserver and the VB application eat up CPU time while exchanging
messages, shortly after opening /dev/ttyS0.  Looks like a race condition of
some kind, because closing the serial port immediately after opening it cures
the issue.  Opening a message box after the serial port hangs.

I can attach a small testcase reproducing the issue.