Created attachment 502876 [details]
Description of problem:
Sometimes, when xscreensaver is left running for a while, the display hangs (screen does not update, does not take input, cannot switch vts).
The screensaver in question is the molecule from xscreensaver-gl-extras, if this is relevant.
Version-Release number of selected component (if applicable):
I've run into this issue twice in two days, but it does happen on every screensaver start. What usually triggers it is when I leave the screesaver on overnight.
Attached is the Xorg.0.log from this, which has a backtrace mentioning an infinite loop.
[ 85589.364] 0: /usr/bin/Xorg (xorg_backtrace+0x2f) [0x4a13df]
[ 85589.366] 1: /usr/bin/Xorg (mieqEnqueue+0x1e9) [0x4a08f9]
[ 85589.367] 2: /usr/bin/Xorg (xf86PostMotionEventM+0xa3) [0x47dae3]
[ 85589.367] 3: /usr/bin/Xorg (xf86PostMotionEventP+0x52) [0x47dc02]
[ 85589.367] 4: /usr/lib64/xorg/modules/input/evdev_drv.so (0x7f5cfa136000+0x498b) [0x7f5cfa13a98b]
[ 85589.367] 5: /usr/bin/Xorg (0x400000+0x6b538) [0x46b538]
[ 85589.368] 6: /usr/bin/Xorg (0x400000+0x119bf0) [0x519bf0]
[ 85589.368] 7: /lib64/libpthread.so.0 (0x341e200000+0xf3c0) [0x341e20f3c0]
[ 85589.368] 8: /lib64/libc.so.6 (0x341de00000+0xeda8c) [0x341deeda8c]
[ 85589.368] 9: /lib64/libc.so.6 (0x341de00000+0x7eb51) [0x341de7eb51]
[ 85589.368] 10: /lib64/libc.so.6 (__libc_malloc+0x67) [0x341de7c917]
[ 85589.368] 11: /lib64/libc.so.6 (0x341de00000+0x7234d) [0x341de7234d]
[ 85589.368] 12: /lib64/libc.so.6 (0x341de00000+0x788aa) [0x341de788aa]
[ 85589.384] 13: /lib64/libc.so.6 (0x341de00000+0x7ada4) [0x341de7ada4]
[ 85589.384] 14: /lib64/libc.so.6 (__libc_calloc+0xc5) [0x341de7dc75]
[ 85589.395] 15: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f5cfbbba000+0x2562a) [0x7f5cfbbdf62a]
[ 85589.395] 16: /usr/lib64/libdrm.so.2 (drmHandleEvent+0xa3) [0x34316074c3]
[ 85589.395] 17: /usr/bin/Xorg (WakeupHandler+0x5b) [0x432b8b]
[ 85589.395] 18: /usr/bin/Xorg (WaitForSomething+0x1a9) [0x45b7c9]
[ 85589.395] 19: /usr/bin/Xorg (0x400000+0x2e9aa) [0x42e9aa]
[ 85589.395] 20: /usr/bin/Xorg (0x400000+0x22e1a) [0x422e1a]
[ 85589.395] 21: /lib64/libc.so.6 (__libc_start_main+0xed) [0x341de2143d]
[ 85589.395] 22: /usr/bin/Xorg (0x400000+0x23101) [0x423101]
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