no wifi adapter found ubuntu 18.04

[koblla]

hello
i installed ubuntu 18.04 recently and everything works fine except wifi.
i tried every solution i have seen on this forum none worked, like "sudo apt-get install bcmwl-kernel-source".
i use Lenovo ideapad 320 and my network adapter is RTL8821CE.
please help me
also output for lspci:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d4e (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
01:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX150] (rev a1)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter

output for lsusb:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 5986:210f Acer, Inc 
Bus 001 Device 003: ID 0bda:c024 Realtek Semiconductor Corp. 
Bus 001 Device 008: ID 04e8:6863 Samsung Electronics Co., Ltd GT-I9500 [Galaxy S4] / GT-I9250 [Galaxy Nexus] (network tethering)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[jeremy31]

See the wireless script link in my signature and post results

[koblla]

here is my ubuntu pastebin
http://paste.ubuntu.com/p/mWdXzGJRkC/

[praseodym]

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter

There it is. Driver installation

sudo apt-get install --reinstall git dkms build-essential linux-headers-$(uname -r)
git clone https://github.com/tomaspinho/rtl8821ce
cd rtl8821ce
chmod +x dkms-install.sh
chmod +x dkms-remove.sh
sudo ./dkms-install.sh

Reboot and deactivate SecureBoot

[koblla]

how to deactivate secureboot ? (im new to ubuntu)

[jeremy31]

Secure Boot is a setting in UEFI/BIOS

[tejaslok]

There it is. Driver installation

sudo apt-get install --reinstall git dkms build-essential linux-headers-$(uname -r)
git clone https://github.com/tomaspinho/rtl8821ce
cd rtl8821ce
chmod +x dkms-install.sh
chmod +x dkms-remove.sh
sudo ./dkms-install.sh

Reboot and deactivate SecureBoot

Thanks, This worked for me
Laptop - HP 15g-dr0006tx model.

[timlawson4jc]

I did this in Ubunto 18.1 on a new HP laptop 17-ca0044cl purchased at Costco in 2018. It worked! Thank you,,thank you,,thank you

[wisjim2]

I've been fighting this problem for months. THANK YOU praseodym!!! This worked like a charm.

[mando774]

you are a god send! I salute you, I've spent so long trying different fixes for this!