Its trying to read from /dev/ttyHS2:
phablet@ubuntu-phablet:~$ sudo ls -l /proc/518/fd total 0 lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 0 -> /dev/null lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 1 -> /dev/null lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 2 -> /dev/null l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 3 -> /dev/alog/main l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 4 -> /dev/alog/radio l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 5 -> /dev/alog/events l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 6 -> /dev/alog/system lr-x------ 1 1002 bluetooth 64 Aug 28 12:40 7 -> /system/etc/firmware/bcm4330.hcd lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 8 -> /dev/ttyHS2 lr-x------ 1 1002 bluetooth 64 Aug 28 12:40 9 -> /dev/__properties__ (deleted)
Its trying to read from /dev/ttyHS2:
phablet@ ubuntu- phablet: ~$ sudo ls -l /proc/518/fd etc/firmware/ bcm4330. hcd
total 0
lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 0 -> /dev/null
lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 1 -> /dev/null
lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 2 -> /dev/null
l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 3 -> /dev/alog/main
l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 4 -> /dev/alog/radio
l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 5 -> /dev/alog/events
l-wx------ 1 1002 bluetooth 64 Aug 28 12:40 6 -> /dev/alog/system
lr-x------ 1 1002 bluetooth 64 Aug 28 12:40 7 -> /system/
lrwx------ 1 1002 bluetooth 64 Aug 28 12:40 8 -> /dev/ttyHS2
lr-x------ 1 1002 bluetooth 64 Aug 28 12:40 9 -> /dev/__properties__ (deleted)