Invalid Misc?

[alexnetdoc]

Hi,

recently I have installed Linux Mint on Y520 Lenovo laptop. I had to unblock the wifi card and install the drivers in otder for the connection not to drop. For now the wifi is stable 50/50 of the times. it can be stable for all day, but then drop again. Sometimes the connection drops only for web????? confused... All other Linux machines are working, windows devices are working and phones are connected. I am newbie to Linux, so maybe someone knows what is Invalid Misc means and how properly to check wifi error logs?

wlp3s0 IEEE 802.11 ESSID:"xxx
Mode:Managed Frequency:2.417 GHz Access Point: xx:xx:xx:xx:xx:xx
Bit Rate=150 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-38 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:252 Missed beacon:0

Any help would be apprecated

system info:
System: Host: LINUXMINT Kernel: 4.10.0-38-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: Cinnamon 3.6.6 (Gtk 3.18.9-1ubuntu3.3)
Distro: Linux Mint 18.3 Sylvia
Machine: System: LENOVO (portable) product: 80WK v: Lenovo Y520-15IKBN
Mobo: LENOVO model: Provence-5R1 v: NO DPK
Bios: LENOVO v: 4KCN23WW date: 01/12/2017
CPU: Quad core Intel Core i5-7300HQ (-MCP-) cache: 6144 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 19968
clock speeds: max: 3500 MHz 1: 1003 MHz 2: 976 MHz 3: 987 MHz
4: 1002 MHz
Graphics: Card-1: Intel Device 591b bus-ID: 00:02.0
Card-2: NVIDIA Device 1c8d bus-ID: 01:00.0
Display Server: X.Org 1.18.4 driver: nvidia
Resolution: 1920x1080@60.05hz
GLX Renderer: GeForce GTX 1050/PCIe/SSE2
GLX Version: 4.5.0 NVIDIA 384.90 Direct Rendering: Yes
Audio: Card-1 Intel Device a171 driver: snd_hda_intel bus-ID: 00:1f.3
Card-2 Sennheiser driver: USB Audio usb-ID: 001-002
Sound: Advanced Linux Sound Architecture v: k4.10.0-38-generic
Network: Card-1: Realtek RTL8821AE 802.11ac PCIe Wireless Network Adapter
driver: rtl8821ae port: 4000 bus-ID: 03:00.0
IF: wlp3s0 state: up mac: <filter>
Card-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169 v: 2.3LK-NAPI port: 3000 bus-ID: 04:00.0
IF: enp4s0 state: down mac: <filter>
Drives: HDD Total Size: 1000.2GB (3.0% used)
ID-1: /dev/nvme0n1 model: N/A size: 128.0GB
ID-2: /dev/sda model: ST1000LM035 size: 1000.2GB
Partition: ID-1: / size: 114G used: 20G (18%) fs: ext4 dev: /dev/sda3
ID-2: swap-1 size: 10.00GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 45.5C mobo: N/A gpu: 0.0:37C
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 231 Uptime: 23 min Memory: 2645.0/7857.3MB
Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (bash 4.3.481) inxi: 2.2.35

[alexnetdoc]

Update:
I have made the actions JeremyB provided in the post: viewtopic.php?f=53&t=256087
i will check how it goes... atleast after restart the wifi is stable all the time...

But I have no idea what those commands do, but I would like to know for my understanding

Alex