The syslog has the following on the minute of the hang:
Sep 11 12:48:26 ubuntu-phablet kernel: [86007.486309]Mali<1>: get_unused_fd() got fd < 0, fd=ffffffe8
Sep 11 12:48:26 ubuntu-phablet kernel: [86007.486328]Mali<1>: mali_timeline_sync_fence_create() fail!, return sync_fd=ffffffff
The syslog has the following on the minute of the hang: 486309] Mali<1> : get_unused_fd() got fd < 0, fd=ffffffe8 486328] Mali<1> : mali_timeline_ sync_fence_ create( ) fail!, return sync_fd=ffffffff
Sep 11 12:48:26 ubuntu-phablet kernel: [86007.
Sep 11 12:48:26 ubuntu-phablet kernel: [86007.