WIFI is connected but no internet

[sleeper12]

See if secure boot is on in UEFI/BIOS. If so, turn it off.

[ciesel 2_4]

I have in my BIOS only:
Quiet Boot [Enabled]
Network Boot [Enabled]
SATA Mode [IDE]

[sleeper12]

Try reloading the driver:

Code: Select all

 sudo modprobe -r ath9k && sudo modprobe ath9k 

If that's no help, maybe get a usb wifi adapter like Panda that works out of the box.

[ciesel 2_4]

Response to this:

modprobe: FATAL: Module @@ not found.

And than:
No more Wlan at all.

[sleeper12]

Do:

Code: Select all

 sudo ifconfig wlp3s0 up 

Then, let's see if you still have a driver:

Code: Select all

 lspci -nnk | grep -iA3 net 

[ciesel 2_4]

Code: Select all

ciesel@ciesel-Aspire-5735:~$ sudo ifconfig wlp3s0 up
[sudo] Passwort für ciesel:            
ciesel@ciesel-Aspire-5735:~$ lspci -nnk | grep -iA3 net
02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8071 PCI-E Gigabit Ethernet Controller [11ab:436b] (rev 16)
        Subsystem: Acer Incorporated [ALI] 88E8071 PCI-E Gigabit Ethernet Controller [1025:013f]
        Kernel driver in use: sky2
        Kernel modules: sky2
03:00.0 Network controller [0280]: Qualcomm Atheros AR928X Wireless Network Adapter (PCI-Express) [168c:002a] (rev 01)
        Subsystem: Quanta Microsystems, Inc EM303 802.11bgn Wireless Mini PCIe Card [AR9281] [1a32:0303]
        Kernel driver in use: ath9k
        Kernel modules: ath9k
ciesel@ciesel-Aspire-5735:~$ 

[ciesel 2_4]

If possible also usb wireless adapter Archer T600 Plus Dual Band ?

[sleeper12]

Does wifi work if you disconnect (unplug) ethernet?

[ciesel 2_4]

I have no ethernet, only wlan in my room. But i have proved on the main station with kabel, but this works also not.

[sleeper12]

Ok, I don't know anything else to do except try a usb wifi adapter like Panda.

[ciesel 2_4]

Thanks and cheers for your hard work!!

[sleeper12]

See which kernel you have now:

Code: Select all

 uname -r 

If you're still on 19.3, you should have 4.15.0-117 kernel. If not, get that kernel & see if wifi works then.

[ciesel 2_4]

There was kernel: 5.4.0-42-generic
I have changed, but there was only 4.15.0-112, without sucess.
I have tryed a free wlan telekom, but than no more wlan and the information:
Wlan not available 802.1x-Supplicant failed

[sleeper12]

Maybe something has changed. Let's see your system details again:

Code: Select all

 inxi -Fxxxz && rfkill list && mokutil --sb-state 

[ciesel 2_4]

Now with Ulyana and D-Link USB Adapter

Code: Select all

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

ciesel@ciesel-Aspire-5735:~$ inxi -Fxxxz @@ rfkill list@@ mokutil --sb-state
Error 22: Unsupported option: @@
Check -h for correct parameters.
ciesel@ciesel-Aspire-5735:~$ inxi -Fxxxz @@ rfkill list @@ mokutil --sb-state
Error 22: Unsupported option: @@
Check -h for correct parameters.
ciesel@ciesel-Aspire-5735:~$ inxi -Fxxxz @@ rfkill list @@ mokutil --sb-state
Error 22: Unsupported option: @@
Check -h for correct parameters.
ciesel@ciesel-Aspire-5735:~$ sudo service network-manager restart
[sudo] password for ciesel:            
ciesel@ciesel-Aspire-5735:~$ mokutil --sb-state
bash: mokutil: command not found
ciesel@ciesel-Aspire-5735:~$ inxi -Fxz
System:
  Kernel: 5.4.0-26-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Cinnamon 4.6.6 Distro: Linux Mint 20 Ulyana 
  base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: Acer product: Aspire 5735 v: 0100 serial: <filter> 
  Mobo: Acer model: CathedralPeak v: Rev serial: <filter> BIOS: Phoenix 
  v: 1.07 date: 08/27/2008 
CPU:
  Topology: Dual Core model: Intel Pentium Dual T3200 bits: 64 type: MCP 
  arch: Core Merom rev: D L2 cache: 1024 KiB 
  flags: lm nx pae sse sse2 sse3 ssse3 bogomips: 7979 
  Speed: 1995 MHz min/max: 1000/2000 MHz Core speeds (MHz): 1: 1995 2: 1995 
Graphics:
  Device-1: Intel Mobile 4 Series Integrated Graphics 
  vendor: Acer Incorporated ALI driver: i915 v: kernel bus ID: 00:02.0 
  Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1366x768~60Hz 
  OpenGL: renderer: Mesa DRI Mobile Intel GM45 Express (CTG) 
  v: 2.1 Mesa 20.0.4 direct render: Yes 
Audio:
  Device-1: Intel 82801I HD Audio vendor: Acer Incorporated ALI 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  Sound Server: ALSA v: k5.4.0-26-generic 
Network:
  Device-1: Marvell 88E8071 PCI-E Gigabit Ethernet 
  vendor: Acer Incorporated ALI driver: sky2 v: 1.30 port: 2000 
  bus ID: 02:00.0 
  IF: enp2s0 state: down mac: <filter> 
  Device-2: Qualcomm Atheros AR928X Wireless Network Adapter 
  vendor: Quanta Microsystems EM303 802.11bgn driver: ath9k v: kernel 
  port: 2000 bus ID: 03:00.0 
  IF: wlp3s0 state: up mac: <filter> 
  Device-3: D-Link Wireless N Nano USB Adapter type: USB driver: rtl8xxxu 
  bus ID: 2-3:3 
  IF: wlxc4e90a02e237 state: down mac: <filter> 
Drives:
  Local Storage: total: 298.09 GiB used: 24.31 GiB (8.2%) 
  ID-1: /dev/sda vendor: Hitachi model: HTS543232L9A300 size: 298.09 GiB 
  temp: 49 C 
Partition:
  ID-1: / size: 10.45 GiB used: 6.50 GiB (62.2%) fs: ext4 dev: /dev/sda15 
Sensors:
  System Temperatures: cpu: 57.0 C mobo: 56.0 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 195 Uptime: 20m Memory: 2.85 GiB used: 1.03 GiB (35.9%) 
  Init: systemd runlevel: 5 Compilers: gcc: 9.3.0 Shell: bash v: 5.0.16 
  inxi: 3.0.38 
ciesel@ciesel-Aspire-5735:~$ ^C
ciesel@ciesel-Aspire-5735:~$ 

[sleeper12]

I don't see any changes, so just stay with the usb adapter which seems to works for you.