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I have a wireless dongle that seems to be installed correctly, but no wireless adapter appears in my network manager and I can't debug the issue.

I've ran wireless-info from: My wireless/WiFi connection does not work. What information is needed to diagnose the issue? and my wireless-info.txt is: https://pastebin.com/nddpF5S9

Any suggestions?

sinjax
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    Please try: sudo modprobe -r rtl8192cu and then: sudo iwlist scan Are there now scan results? We don't need to see the actual result, just tell us if you see any. Welcome to Ask Ubuntu. – chili555 Jun 19 '18 at 19:49
  • Disregard me for the moment. If I say white and @chili555 says, black: believe him, not me! :-) :-) :-) – Fabby Jun 19 '18 at 19:55
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    @Fabby His device is claimed by two drivers, rtl8192cu and rtl8xxxu, both of which loaded and conflict. I think we need a blacklist! – chili555 Jun 19 '18 at 20:04
  • ah ok so i did sudo modeprobe -r rtl8192cu and ....now i don't see the device using ifconfig -a – sinjax Jun 19 '18 at 20:07
  • @chili555 If it would help, sinjax is already in the AU General chat... – Fabby Jun 19 '18 at 20:09
  • @chili555 i tried disabling rtl8xxxu and enabling rtl8192cu and the device appears again. iwlist scan says wlxec3dfde1109a Interface doesn't support scanning: Network is down. I tried ifup, no dice. – sinjax Jun 19 '18 at 20:11

2 Answers2

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We have seen many rtl8192cu cases where two drivers load and conflict. Let's blacklist one and see if it helps; if not, we'll try the other.

From the terminal:

sudo -i
echo "blacklist rtl8192cu"  >  /etc/modprobe.d/blacklist-rtl8192cu.conf
exit

Reboot. Any improvement?

If not, we'll reverse it:

sudo -i
rm /etc/modprobe.d/blacklist-rtl8192cu.conf
echo "blacklist rtl8xxxu"  >  /etc/modprobe.d/blacklist-rtl8xxxu.conf
exit

Reboot.

Depending on your results, we'll further refine this answer.

chili555
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In then end I upgraded to 18.04 on this machine and the dongle worked. Not the most satisfying result but hopefully it saves someone time.

sinjax
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