No wireless connection with Live+Nonfree Stretch

[xanadu18]

I downloaded, verified SHA256 then burned the iso of LIVE Debian 9.4 non-free installer to a DVD. Upon installation, the screen shows successful network hardware check and DHCP check. However, I then got the message about repo mirrors being failed.

I continued on and completed the installation. Upon the initial reboot, there's no wireless connection at all.

My wireless adapter is TP-Link (forgot model number) using RT-2700usb driver, according to lsusb command.

Did I downloaded the wrong installer file?

Look forward to hearing from you soon. Thanks for your help.

[debiman]

Upon the initial reboot, there's no wireless connection at all.

please define "no connection at all".
are you using the default gnome desktop with networkmanager?
is wireless networking enabled?
can you create a new wireless connection?

also output of

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ping -c3 8.8.8.8
ping -c3 google.com

please

[xanadu18]

I re-installed Debian Stretch 9.4 using DVD1 ("nonfree firmware included"). During installation,WPA2 and DHCP connections were tested "successfully". I chose KDE interface.

However, after initial reboot, the screen shows "WiFi network could not be found" even though during installation and after reboot I chose the correct SSID and password. In fact, the SSID I chose is one of the available connections from Network Manager sub-screen.

I thought the non-free firmware for my Ralink-based wireless adapter would be included in the DVD.

This reply was posted using openSUSE Leap on the same PC, where there's no problem with wireless connection.

Any suggestions? Thanks a lot for your help.

[xanadu18]

I am at a loss.

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lsusb

Device ID: 148f:3070 Ralink Technology, Corp, RT2870/3070 Wireless Adapter

This adapter is in the list of wireless adapters supported by Stretch.

firmware-misc-nonfree is the latest package and is already installed.

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rfkill list

phy0: Wireless LAN
Soft Blocked: No
Hard Blocked: No

Please help!

[bw123]

networkmanager since jessie has issues with rt2870 devices among others. Try turning off MAC randomization
https://blogs.gnome.org/thaller/2016/08 ... ger-1-4-0/
https://bugs.debian.org/cgi-bin/bugrepo ... bug=842422

[xanadu18]

Hello bw123,

I turned off random MAC address feature in NetworkManager configuration file (i.e. Networkmanager.conf) as suggested in the second link you provided.

WiFi works now. Thanks a lot for your help.