I've been having a minor but mildly annoying problem. From time to time, the entire MATE desktop will flash, and all open windows remain open; however, the order in which their tabs appear in the bottom panel is randomly rearranged. So, if I have 13 terminal windows open, I can no longer quickly bring the one I want to the front until I've arranged them back in the order in which I had them. I think this only affects the Workspace I have open (but can't be completely certain). It happens fairly infrequently.
When this happens, I've discovered /var/log/syslog contains a message like this: debian kernel: [605512.613750] mate-panel: segfault at 1 ip 00007f5c90049823 sp 00007ffc68f6b6f0 error 4 in libgtk-3.so.0.2200.11[7f5c8fca1000+700000] (The instruction pointer and the stack pointer values will vary, as you'd expect.) I am running Debian 9, Linux kernel 4.6.0-1-amd64 x86_64, with MATE 1.16.2 desktop; my computer has a PNY Quadro K620 2GB Video Card and is running libdrm-nouveau2 version 2.4.74-1 and xserver-xorg-video-nouveau version 1:1.0.13-3. Can anyone suggest what causes this issue and how to prevent it? Best regards, Greg Marks
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