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Date:      Mon, 15 Sep 2014 05:39:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-x11@FreeBSD.org
Subject:   [Bug 170690] x11-servers/xorg-server eats memory
Message-ID:  <bug-170690-8047-x8yXe1PG36@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-170690-8047@https.bugs.freebsd.org/bugzilla/>
References:  <bug-170690-8047@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=170690

--- Comment #9 from emz@norma.perm.ru ---
By the way, I can say that the problem exists on various platforms.
Type QT_X11_NO_MITSHM in google and see how many people describe the problem
with empty windows. One time the problem was amplified to the point where empty
windows were appearing right after start
(https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701469), it was patched a
bit, to the point where empty windows appear after several days of uptime.

As about myself in particular, I don't like to reboot my desktop in the office
so it stays on all the time. After a week of xorg uptime I start to see empty
windows, so it looks like a leak of memory of some kind. Some Qt applications,
like psi, can be cured by setting QT_X11_NO_MITSHM=1 in their ENV and
restarted. This affects only Qt applications, not the GTK ones. After some
point the xorg crash is inevitable. It crashes and all the process begins
again. I observe this during years.

The majority of users that I asked (not much though, FreeBSD on desktops isn't
that popular) told me that they really cannot reproduce the problem - either
because they are not using much of Qt applications, or they are rebooting their
machines (laptops mostly) after some period of time.

Yup, an experiment could be taken with disabling the shm extension completely.
Something I plan to do, but not yet. After all, I think the shm extension
should not behave like that.

When this problem arises, Qt applications launched from a shell show the error
messages similar or identical to the messages in the debbian pr I mentioned.

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