usb not openning

nothing happens on inserting pendrive, light glows on pendrive but can't see on laptop.
on running dmesg i got as below:
[10570.507467] type=1400 audit(1505666009.011:200915): apparmor="DENIED" operation="open" profile="/usr/bin/evince-thumbnailer" name="/usr/local/lib/libgobject-2.0.so.0.3800.2" pid=27554 comm="evince-thumbnai" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[10570.507703] type=1400 audit(1505666009.011:200916): apparmor="DENIED" operation="open" profile="/usr/bin/evince-thumbnailer" name="/usr/local/lib/libglib-2.0.so.0.3800.2" pid=27554 comm="evince-thumbnai" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[10570.508808] type=1400 audit(1505666009.011:200917): apparmor="DENIED" operation="open" profile="/usr/bin/evince-thumbnailer" name="/usr/local/lib/libgmodule-2.0.so.0.3800.2" pid=27554 comm="evince-thumbnai" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[10570.511724] type=1400 audit(1505666009.015:200918): apparmor="DENIED" operation="open" profile="/usr/bin/evince-thumbnailer" name="/usr/local/lib/libffi.so.6.0.4" pid=27554 comm="evince-thumbnai" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[10575.454040] audit_printk_skb: 270 callbacks suppressed
[10575.454047] type=1400 audit(1505666013.959:201009): apparmor="DENIED" operation="open" profile="/usr/bin/evince-thumbnailer" name="/usr/local/lib/libgio-2.0.so.0.3800.2" pid=27592 comm="evince-thumbnai" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0