[BRLTTY] BrlTTY Braille freezes on Windows7 64-bit with NVDA

[Michael Whapples]

I have tried pressing keys after the freeze, they seem to do nothing and in 
particular the key combination for restarting the Braille driver does not 
seem to do anything. I have attached a log file for when I do these key 
presses on the Braille display. Please note that while I use NVDA with 
Braille when the freeze occurs, in that log file I then turned off Braille 
output in NVDA to test the Braille display keys as I know clients can take 
all the key presses.

When the Braille freezes, it remains constant as what was showing when 
Braille froze.

If it is a libusb win32 issue, well it seems to be repeatable enough for me 
that if you let me know what to do I could get debug information for libusb.

Michael Whapples

-----Original Message----- 
From: Samuel Thibault
Sent: Tuesday, January 10, 2012 1:17 AM
To: Informal discussion between users and developers of BRLTTY.
Subject: Re: [BRLTTY] BrlTTY Braille freezes on Windows7 64-bit with NVDA

Hello,

Michael Whapples, le Mon 09 Jan 2012 18:05:13 -0000, a écrit :
> Here is a debug.log file (attached) from running the debug batch file,

Thanks for this. Things seem to be going oddly in libusb.  Brltty itself
is not frozen, but apparently libusb is not able to work any more at
some point.  Do you happen to have several cores in your processor?
There might be threading issues in libusb, we have already seen that.
Some of these were solved in the last version, but maybe there are
others. Could you try version 4.3-3 which I have just uploaded on

http://brl.thefreecat.org/brltty/

?  It contains a hack that mitigates threading issues.

Samuel
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