Comment 41 for bug 1172094

I'm running Kubuntu 14.10 and I am still experiencing the bug.
For me it does not seem to be related to suspend/resume, at least it happens long after a resume. Also, there was never a particular high load on the machine. In my case it seems to get triggered by clicking on a link which then gets opened in the Chrome browser, but unfortunately it is not reproducible.

The screen turns black and after some time the login screen appears. Xorg.0.log.old contains:

(EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
(EE) BUG: ../../src/synaptics.c:2991 in UpdateTouchState()
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7fbbab374f76]
(EE) 1: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fbba294a000+0x527e) [0x7fbba294f27e]
(EE) 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fbba294a000+0x75a2) [0x7fbba29515a2]
(EE) 3: /usr/bin/X (0x7fbbab1be000+0x95968) [0x7fbbab253968]
(EE) 4: /usr/bin/X (0x7fbbab1be000+0xbfff9) [0x7fbbab27dff9]
(EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (0x7fbba8ef3000+0x36eb0) [0x7fbba8f29eb0]
(EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x33) [0x7fbba8fe4673]
(EE) 7: /usr/bin/X (WaitForSomething+0x1b4) [0x7fbbab372314]
(EE) 8: /usr/bin/X (0x7fbbab1be000+0x57311) [0x7fbbab215311]
(EE) 9: /usr/bin/X (0x7fbbab1be000+0x5b706) [0x7fbbab219706]
(EE) 10: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fbba8f14ec5]
(EE) 11: /usr/bin/X (0x7fbbab1be000+0x45a8e) [0x7fbbab203a8e]
(EE)
(EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
(EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
(EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
(EE) BUG: ../../src/synaptics.c:2991 in UpdateTouchState()
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