Home network not displayed after installation

I’m trying to install the latest version of Manjaro KDE on an old Acer Aspire laptop. Our home wifi network shows up as long as I’m running the OS from the USB stick. But after install the network doesn’t show up, only our neighbors’. After reading some posts here, I removed the network driver in hardware configuration and restarted. My network showed up and I could connect to it. But Pamac acted strangely, finding no updates etc. And after starting Firefox, the computer froze after starting a speed check.

I then tried to reinstall the network drivers again, only resulting in a computer freeze.

Please advice!

inxi -Fazy says this:

  Kernel: 5.8.11-1-MANJARO x86_64 bits: 64 compiler: N/A 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.8-x86_64 
  root=UUID=b6125a0a-e90e-42eb-8133-8d7d239abd23 rw quiet apparmor=1 
  security=apparmor resume=UUID=087297a8-d79b-42d5-a441-40a76c932ce3 
  Desktop: KDE Plasma 5.19.5 tk: Qt 5.15.1 wm: kwin_x11 dm: SDDM 
  Distro: Manjaro Linux 
  Type: Laptop System: Acer product: Aspire 5742G v: V1.05 serial: <filter> 
  Mobo: Acer model: Aspire 5742G v: V1.05 serial: <filter> BIOS: Acer v: 1.05 
  date: 08/24/2010 
  ID-1: BAT0 charge: 0% condition: 40.4/47.5 Wh (85%) volts: 9.4/10.8 
  model: SANYO Li_Ion_4000mA type: Li-ion serial: <filter> status: Charging 
  Topology: Dual Core model: Intel Core i5 M 460 bits: 64 type: MT MCP 
  arch: Nehalem family: 6 model-id: 25 (37) stepping: 5 microcode: 7 
  L2 cache: 3072 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 20226 
  Speed: 1370 MHz min/max: 1199/2534 MHz boost: enabled Core speeds (MHz): 
  1: 1424 2: 1283 3: 1547 4: 1575 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
  Type: l1tf 
  mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
  Type: mds 
  status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: conditional, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
  Device-1: AMD Park [Mobility Radeon HD 5430/5450/5470] 
  vendor: Acer Incorporated ALI driver: radeon v: kernel bus ID: 01:00.0 
  chip ID: 1002:68e0 
  Device-2: ALi Gateway Webcam type: USB driver: uvcvideo bus ID: 1-1.1:3 
  chip ID: 0402:9665 
  Display: x11 server: X.Org 1.20.9 compositor: kwin_x11 driver: radeon 
  FAILED: ati unloaded: modesetting alternate: fbdev,vesa display ID: :0 
  screens: 1 
  Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.2x8.0") 
  s-diag: 414mm (16.3") 
  Monitor-1: LVDS res: 1366x768 hz: 60 
  OpenGL: renderer: AMD CEDAR (DRM 2.50.0 / 5.8.11-1-MANJARO LLVM 10.0.1) 
  v: 3.3 Mesa 20.1.8 compat-v: 3.1 direct render: Yes 
  Device-1: Intel 5 Series/3400 Series High Definition Audio 
  vendor: Acer Incorporated ALI driver: snd_hda_intel v: kernel 
  bus ID: 00:1b.0 chip ID: 8086:3b56 
  Device-2: AMD Cedar HDMI Audio [Radeon HD 5400/6300/7300 Series] 
  vendor: Acer Incorporated ALI driver: snd_hda_intel v: kernel 
  bus ID: 01:00.1 chip ID: 1002:aa68 
  Sound Server: ALSA v: k5.8.11-1-MANJARO 
  Device-1: Broadcom and subsidiaries NetLink BCM57780 Gigabit Ethernet PCIe 
  vendor: Acer Incorporated ALI driver: tg3 v: kernel port: 3000 
  bus ID: 02:00.0 chip ID: 14e4:1692 
  IF: enp2s0 state: down mac: <filter> 
  Device-2: Broadcom and subsidiaries BCM43225 802.11b/g/n 
  vendor: Foxconn T77H103.00 Wireless Half-size Mini PCIe Card driver: wl 
  v: kernel modules: bcma port: 3000 bus ID: 03:00.0 chip ID: 14e4:4357 
  IF: wlp3s0 state: dormant mac: <filter> 
  Local Storage: total: 931.52 GiB used: 411.48 GiB (44.2%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda vendor: Hitachi model: HTS545050B9A300 size: 465.76 GiB 
  block size: physical: 512 B logical: 512 B speed: 3.0 Gb/s 
  rotation: 5400 rpm serial: <filter> rev: C60F scheme: MBR 
  ID-2: /dev/sdb type: USB vendor: SanDisk model: Extreme Portable SSD 
  size: 465.76 GiB block size: physical: 4096 B logical: 512 B 
  serial: <filter> rev: 1012 scheme: MBR 
  SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure? 
  ID-1: / raw size: 457.60 GiB size: 449.41 GiB (98.21%) used: 6.86 GiB (1.5%) 
  fs: ext4 dev: /dev/sda1 
  Kernel: swappiness: 60 (default) cache pressure: 100 (default) 
  ID-1: swap-1 type: partition size: 8.16 GiB used: 0 KiB (0.0%) priority: -2 
  dev: /dev/sda2 
  System Temperatures: cpu: 45.0 C mobo: N/A gpu: radeon temp: 42 C 
  Fan Speeds (RPM): N/A 
  Processes: 169 Uptime: 9m Memory: 3.71 GiB used: 636.0 MiB (16.7%) 
  Init: systemd v: 246 Compilers: gcc: N/A Packages: pacman: 1161 lib: 317 
  flatpak: 0 Shell: Bash v: 5.0.18 running in: yakuake inxi: 3.1.05

Any help here? Same thing happened when installing Linux Mint. The network is visible as long as I’m running from the USB stick. After installation, it’s gone.

Try another kernel, e.g. 5.4 or 4.19. Don’t forget to update.