It appears that apparmor is blocking u2f requests :
[ 5955.568022] audit: type=1400 audit(1526465659.599:92): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name="/sys/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:045E:07B2.0001/report_descriptor" pid=19386 comm="TaskSchedulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 [ 5955.568379] audit: type=1400 audit(1526465659.599:93): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name="/sys/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.1/0003:045E:07B2.0002/report_descriptor" pid=19386 comm="TaskSchedulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 [ 5955.568667] audit: type=1400 audit(1526465659.599:94): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name="/sys/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.2/0003:045E:07B2.0003/report_descriptor" pid=19386 comm="TaskSchedulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 [ 5955.569840] audit: type=1400 audit(1526465659.599:95): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name="/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/0003:1050:0407.002D/report_descriptor" pid=19386 comm="TaskSchedulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 [ 5955.570337] audit: type=1400 audit(1526465659.603:96): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name="/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.1/0003:1050:0407.002E/report_descriptor" pid=19386 comm="TaskSchedulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
It appears that apparmor is blocking u2f requests :
[ 5955.568022] audit: type=1400 audit(152646565 9.599:92) : apparmor="DENIED" operation="open" profile= "snap.chromium. chromium" name="/ sys/devices/ pci0000: 00/0000: 00:14.0/ usb3/3- 3/3-3:1. 0/0003: 045E:07B2. 0001/report_ descriptor" pid=19386 comm="TaskSched ulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 9.599:93) : apparmor="DENIED" operation="open" profile= "snap.chromium. chromium" name="/ sys/devices/ pci0000: 00/0000: 00:14.0/ usb3/3- 3/3-3:1. 1/0003: 045E:07B2. 0002/report_ descriptor" pid=19386 comm="TaskSched ulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 9.599:94) : apparmor="DENIED" operation="open" profile= "snap.chromium. chromium" name="/ sys/devices/ pci0000: 00/0000: 00:14.0/ usb3/3- 3/3-3:1. 2/0003: 045E:07B2. 0003/report_ descriptor" pid=19386 comm="TaskSched ulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 9.599:95) : apparmor="DENIED" operation="open" profile= "snap.chromium. chromium" name="/ sys/devices/ pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.2/ 1-1.2:1. 0/0003: 1050:0407. 002D/report_ descriptor" pid=19386 comm="TaskSched ulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 9.603:96) : apparmor="DENIED" operation="open" profile= "snap.chromium. chromium" name="/ sys/devices/ pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.2/ 1-1.2:1. 1/0003: 1050:0407. 002E/report_ descriptor" pid=19386 comm="TaskSched ulerFo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 5955.568379] audit: type=1400 audit(152646565
[ 5955.568667] audit: type=1400 audit(152646565
[ 5955.569840] audit: type=1400 audit(152646565
[ 5955.570337] audit: type=1400 audit(152646565