Dropped coection, both Broadcom and Realtek cards

The wireless coection drops on my HP Stream 11 ruing Xubuntu 16.04 unless I am close to an AP.

I am currently using a USB wireless adapter with a Realtek RTL8188EUS chip. But I had the sane problem with Ubuntu 16.04 using the onboard Broadcom BCM43142 card.

I am especially baffled by the same issue when using two different cards and drivers.

iwconfig:
wlxec086b0c3f21 IEEE 802.11bgn ESSID:"ATT6YXb2IG" Nickname:"<WIFI@REALTEK>"
Mode:Managed Frequency:2.452 GHz Access Point: DC:7F:A4:99:73:B6
Bit Rate:65 Mb/s Sensitivity:0/0
Retryff RTS thrff Fragment thrff
Encryption key:****-****-****-****-****-****-****-**** Security modepen
Power Managementff
Link Quality=0/100 Signal level=2/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

This is something beyond the drivers, right? How can I fix it?