Comment 34 for bug 1172094

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:20.0) Gecko/20100101 Firefox/20.0

I've noticed that - when my machine is under high load and/or memory pressure, Xorg's synaptics support will crash and burn. Whether it's lost interrupts or what,I don't know, but regardless, this is what I'm left with: a non-functional synaptics trackpad and a few log lines:

[ 30590.751] (II) intel(0): Modeline "1920x1080"x0.0 115.83 1920 1980 2028 2050 1080 1090 1100 1130 -hsync -vsync (56.5 kHz e)
[ 30590.862] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
(EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
(EE) BUG: synaptics.c:3122 in UpdateTouchState()
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x58f906]
(EE) 1: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x3277) [0x7f776d387277]
(EE) 2: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x4973) [0x7f776d388973]
(EE) 3: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x73b2) [0x7f776d38b3b2]
(EE) 4: /usr/bin/Xorg (0x400000+0x7b157) [0x47b157]
(EE) 5: /usr/bin/Xorg (0x400000+0xa4838) [0x4a4838]
(EE) 6: /lib64/libpthread.so.0 (0x7f77747c3000+0xf1f0) [0x7f77747d21f0]
(EE) 7: /lib64/libc.so.6 (__select+0x13) [0x7f777370d603]
(EE) 8: /usr/bin/Xorg (WaitForSomething+0x190) [0x58cd10]
(EE) 9: /usr/bin/Xorg (0x400000+0x3d291) [0x43d291]
(EE) 10: /usr/bin/Xorg (0x400000+0x2c06a) [0x42c06a]
(EE) 11: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x7f777364da15]
(EE) 12: /usr/bin/Xorg (0x400000+0x2c3ad) [0x42c3ad]
(EE)
(EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
(EE) BUG: synaptics.c:3122 in UpdateTouchState()
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x58f906]
(EE) 1: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x3277) [0x7f776d387277]
(EE) 2: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x4973) [0x7f776d388973]
(EE) 3: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7f776d384000+0x73b2) [0x7f776d38b3b2]
(EE) 4: /usr/bin/Xorg (0x400000+0x7b157) [0x47b157]
(EE) 5: /usr/bin/Xorg (0x400000+0xa4838) [0x4a4838]
(EE) 6: /lib64/libpthread.so.0 (0x7f77747c3000+0xf1f0) [0x7f77747d21f0]
(EE) 7: /lib64/libc.so.6 (__select+0x13) [0x7f777370d603]
(EE) 8: /usr/bin/Xorg (WaitForSomething+0x190) [0x58cd10]
(EE) 9: /usr/bin/Xorg (0x400000+0x3d291) [0x43d291]
(EE) 10: /usr/bin/Xorg (0x400000+0x2c06a) [0x42c06a]
(EE) 11: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x7f777364da15]
(EE) 12: /usr/bin/Xorg (0x400000+0x2c3ad) [0x42c3ad]
(EE)

Reproducible: Sometimes

Steps to Reproduce:
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