Thanks for the quick response Jeremy. I was aware that I would miss
events during this test, but that was better than freezing. I have not
tried 1.10.x, but I will. We are trying to release a product soon and
changing to a new server and distribution is not straightforward or
the best move on our part. I might have to consider any other solution
for the short term. I am glad to hear that we are not the only ones to
have this problem and that it might already be solved. I will look
further at 1.10.x and go from there.
Thanks again.
Donald
On May 17, 2011, at 4:49 PM, Jeremy Huddleston wrote:
Ignoring SIGIO will just result in dropped events. I seem to
vaguely recall that this issue was addressed at some point in the
past year or two since 1.7.x was active. Have you tried 1.10.x or
master?
On May 17, 2011, at 13:34, Donald Kayser wrote:
I am developing a system that include's the debian/squeeze
distribution of xorg-server, version 1.7.7. I have come across a
scenario where mouse movements on one screen and a touch on another
screen will cause the Xorg process to freeze in an infinite loop in
the function mieqProcessInputEvents(). I have traced the problem
down to a small window during which a call to
mieqProcessDeviceEvent can be interrupted by a signal and mess up
the miEventQueue.head and tail. It appears that in some place in
this stack a new event is being enqueued while the screen is
changing and device messages get swapped to the wrong screen and
back and forth.
I put a global variable in mieqProcessDeviceEvent to indicate to
mieqEnqueue to ignore data until finished. This has solved the
problem as a test. I am now writing the code to ignore the SIGIO
signal during mieqProcessDeviceEvent and test this approach also.
Does anyone have a similar problem or advice?
Thanks
Donald Kayser
xorg at kayser dot net
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