Comment 27 for bug 1159477

from xorg.log:

[ 4763.932] (EE) Backtrace:
[ 4763.932] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f15a7400476]
[ 4763.932] (EE) 1: /usr/bin/X (0x7f15a7250000+0x80c4f) [0x7f15a72d0c4f]
[ 4763.933] (EE) 2: /usr/bin/X (0x7f15a7250000+0x13f6a9) [0x7f15a738f6a9]
[ 4763.933] (EE) 3: /usr/bin/X (0x7f15a7250000+0x13f006) [0x7f15a738f006]
[ 4763.933] (EE) 4: /usr/bin/X (0x7f15a7250000+0x141b13) [0x7f15a7391b13]
[ 4763.933] (EE) 5: /usr/bin/X (0x7f15a7250000+0x16335f) [0x7f15a73b335f]
[ 4763.933] (EE) 6: /usr/bin/X (mieqProcessDeviceEvent+0x1b5) [0x7f15a73e1bb5]
[ 4763.933] (EE) 7: /usr/bin/X (mieqProcessInputEvents+0xf7) [0x7f15a73e1cd7]
[ 4763.933] (EE) 8: /usr/bin/X (ProcessInputEvents+0x9) [0x7f15a72e69a9]
[ 4763.933] (EE) 9: /usr/bin/X (0x7f15a7250000+0x58802) [0x7f15a72a8802]
[ 4763.933] (EE) 10: /usr/bin/X (0x7f15a7250000+0x4757a) [0x7f15a729757a]
[ 4763.933] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f15a4fa0ea5]
[ 4763.933] (EE) 12: /usr/bin/X (0x7f15a7250000+0x478c1) [0x7f15a72978c1]
[ 4763.933] (EE)
[ 4763.938] (EE) BUG: triggered 'if (!(event->device_event.flags & (1 << 5)))'
[ 4763.938] (EE) BUG: ../../dix/touch.c:628 in TouchConvertToPointerEvent()

[ 4763.938] (EE) Non-emulating touch event