Hi i recently installed zorin os 16 on my old Dell laptop . Its having super slow internet, not able to open websites , not able to join Minecraft server . Some website like Google works but some just keeps loading. I tried everything from my side . It's having a Intel corporation wireless-AC 9462 wifi card , system is up to date . Laptop model is Dell Vostro 3590 .
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To Solve Your Problem We May need Some Info:
Type these Commands in Your Terminal and please paste the results 
lshw -C network
lspci
If you are unable to provide some system information. I can only help you with some basic causes for WiFi turning off. :
- Check if Bluetooth was enabled. (WiFi and Bluetooth give a very bad experience when working together on Linux OS)
- People living in smart homes also have problems with poor WiFi, You may try to move closer to your access point or try upgrading your WiFi adapter and internet modem or start using Ethernet Cables.
- Overloading of P.C. with useless applications especially in Notebook Laptops may be the cause of your slow boot-up problem and WiFi stopping. So, remove as many useless applications as you can.
- If you messed up with some internet settings using online content, you might wanna undo that to previous settings. Even Removing your internet Adapter from Configuration will cause a problem.
- Sometimes it's not your WiFi modem or P.C. but your Internet Service Provider who mess up your WiFi.
These are the most basic WiFi problems for a Linux User and I hope this may help you Identifying your problem.
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ARNING: you should run this program as super-user.
*-network
description: Wireless interface
product: Wireless-AC 9462
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlp0s20f3
version: 00
serial: a4:b1:c1:9c:c0:25
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.15.0-46-generic firmware=66.f1c864e0.0 QuZ-a0-jf-b0-66.u ip=192.168.1.10 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:16 memory:b1318000-b131bfff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0
version: 15
serial: c0:3e:ba:0f:d5:a0
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.15.0-46-generic firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=twisted pair
resources: irq:16 ioport:3000(size=256) memory:b1204000-b1204fff memory:b1200000-b1203fff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
................................................................................................................................................
And the second command gives
00:00.0 Host bridge: Intel Corporation Device 9b71 (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
00:14.0 USB controller: Intel Corporation Device 02ed
00:14.2 RAM memory: Intel Corporation Device 02ef
00:14.3 Network controller: Intel Corporation Wireless-AC 9462
00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller
00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Device 02b4 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device 0284
00:1f.3 Audio device: Intel Corporation Device 02c8
00:1f.4 SMBus: Intel Corporation Device 02a3
00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
02:00.0 Non-Volatile memory controller: Device 1e95:9100 (rev 03)
..................................................................................................................................
and the comman problems u just mentioned above 5 issues are not applicable in my case .
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Your Adapter's is Installed, Detected and Working.
Did you installed any application related to VPN or internet/bluetooth or used any internet tutorial to modify any files?
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no its fresh install
i tried not working its the same
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Try 'sudo apt update' and 'sudo apt upgrade' in the terminal.
to open the terminal ctrl + alt +t.
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it worked but now my software app store not not able to check for updates
same goes for my zorin software updater
when i try to join my mc server or any other it cannot join ( unknow host ) it happens when internet not working
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.......
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it updated something but having same error
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Use this Solution and see if it works:-
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it says Then changed the value from 3 to 2, saved changes and rebooted. but my value is already on 2 so what to do ?
leave it the same.
Have you tested your internet speed online and on other devices?
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yes on other devices like laptop tv phone internet is fast no issues
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how many megabits on avg and according to your plan?
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i have 100 mbps plan unlimeted , fiber broadband
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and your router supports 5.0 ghz?
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yes its 2.4 ghz and 5ghz and i have connected to 5ghz band
then, try this tutorial this will surely give you a solution.
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