My Lenovo Yoga 2 11 keeps rebooting,can not shut down

[Hamburger73]

After installing the Broadcom driver in the driver manager it has activated the secure boot in bios,
and the result is that a shut down is not possible anymore.
When I deactivate the secure boot,I have no wifi..!

description: Wireless interface
product: BCM43142 802.11b/g/n
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlp1s0
version: 01
serial: 9c:d2:1e:fb:20:cd
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:16 memory:d0400000-d0407fff

Code: Select all

System:
  Kernel: 5.4.0-72-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Cinnamon 4.8.6 wm: muffin 4.8.1 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: LENOVO product: 20332 v: Lenovo Yoga 2 11 
  serial: <filter> Chassis: type: 10 v: Lenovo Yoga 2 11 serial: <filter> 
  Mobo: LENOVO model: AIUU1 v: 31900049STD serial: <filter> UEFI: LENOVO 
  v: 92CN93WW(V1.93) date: 08/19/2015 
Battery:
  ID-1: BAT0 charge: 24.2 Wh condition: 25.4/31.0 Wh (82%) volts: 8.2/7.4 
  model: Lenovo Yoga 2 11 type: Unknown serial: <filter> status: Charging 
CPU:
  Topology: Quad Core model: Intel Pentium N3530 bits: 64 type: MCP 
  arch: Silvermont rev: 8 L2 cache: 1024 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 17333 
  Speed: 549 MHz min/max: 500/2582 MHz Core speeds (MHz): 1: 500 2: 500 
  3: 500 4: 500 
Graphics:
  Device-1: Intel Atom Processor Z36xxx/Z37xxx Series Graphics & Display 
  vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0f31 
  Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1366x768~60Hz 
  OpenGL: renderer: Mesa DRI Intel HD Graphics (BYT) v: 4.2 Mesa 20.2.6 
  compat-v: 3.0 direct render: Yes 
Audio:
  Device-1: Intel Atom Processor Z36xxx/Z37xxx Series High Definition Audio 
  vendor: Lenovo driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  chip ID: 8086:0f04 
  Sound Server: ALSA v: k5.4.0-72-generic 
Network:
  Device-1: Broadcom and subsidiaries BCM43142 802.11b/g/n vendor: Lenovo 
  driver: wl v: kernel port: 1000 bus ID: 01:00.0 chip ID: 14e4:4365 
  IF: wlp1s0 state: up mac: <filter> 
Drives:
  Local Storage: total: 111.80 GiB used: 9.36 GiB (8.4%) 
  ID-1: /dev/sda vendor: SanDisk model: SSD PLUS 120GB size: 111.80 GiB 
  speed: 3.0 Gb/s serial: <filter> rev: 00RL temp: 33 C scheme: GPT 
Partition:
  ID-1: / size: 109.05 GiB used: 9.35 GiB (8.6%) fs: ext4 dev: /dev/sda2 
Sensors:
  System Temperatures: cpu: 45.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 206 Uptime: 1d 3h 22m Memory: 3.73 GiB used: 1.55 GiB (41.6%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: gnome-terminal inxi: 3.0.38

[SMG]

After installing the Broadcom driver in the driver manager it has activated the secure boot in bios,

Secure Boot is technology which prevents unauthorized software from installing on your computer. It sounds like may have had Secure Boot turned on when you installed Mint. Mint/Ubuntu is set up to be authorized to work with Secure Boot. You do not have to do anything special during the install to make that happen.

However, when you add third party software, you do need to set up keys so your computer knows the third party software is "safe" to install. Broadcom is third party software. If you received a message after installing it that keys were necessary, that means Secure Boot was on when you installed Mint and when you installed Broadcom. Broadcom did not turn that on.

I am not sure why installing the Broadcom software would affect your ability to shut down. I have Broadcom drivers installed and do not have that issue, but mine is a different driver. (I also had wireless without using that driver, but my wireless seems more stable with it.)

When I deactivate the secure boot,I have no wifi..!

I suggest removing the Broadcom driver and then reinstalling it making sure Secure Boot is turned off before you install it. Maybe that will help.