Comment 7 for bug 1553657

Nexus 4, rc-proposed channel, the same issue.

.cache/upstart/application-legacy-webbrowser-app-.log:

Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
libust[17814/17849]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17849]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17850]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17850]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
Input device added: "keypad_8064" "/dev/input/event1" QFlags(0x1)
Input device added: "pmic8xxx_pwrkey" "/dev/input/event0" QFlags(0x1)
Input device added: "apq8064-tabla-snd-card Button Jack" "/dev/input/event3" QFlags()
Input device added: "apq8064-tabla-snd-card Headset Jack" "/dev/input/event4" QFlags(0x20)
Input device added: "touch_dev" "/dev/input/event2" QFlags(0x8)
Input device added: "hs_detect" "/dev/input/event5" QFlags(0x1|0x20)
ubuntumirclient: Got invalid serialized mime data. Ignoring it.
shm_open() failed: Permission denied
qml: Loaded 5 UA override(s) from file:///usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Web/ua-overrides-mobile.js
[0318/143227:ERROR:layer_tree_host_impl.cc(2263)] Forcing zero-copy tile initialization as worker context is missing
libust[17814/17849]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17850]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17849]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17850]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17849]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
libust[17814/17850]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)

maybe it will be useful