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Re: xsrc/49553 Xorg hits 100% CPU on shutdown

The following reply was made to PR xsrc/49553; it has been noted by GNATS.

From: Michael van Elst <>
Subject: Re: xsrc/49553 Xorg hits 100% CPU on shutdown
Date: Sun, 8 Feb 2015 01:13:40 +0100

 I see a very similar backtrace here, but this is not the first issue.
 When you run X in a debugger, or when you disable its SIGSEGV handler
 with Option "NoTrapSignals" "true", then you see that the first thing
 is a segfault in atexit() where it tries to call a registered handler
 at an unmapped address.
 But while X is running, the address is mapped to the shared object
 Looks like the gallium driver is unloaded without unregistering
 (or calling ?) the atexit handler.
                                 Michael van Elst
                                 "A potential Snark may lurk in every tree."

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