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I also have Asus ROG STRIX Z370-E GAMING motherboard with wireless card built in but running Ubuntu 18.04. I tried chili555 answer in post:

Asus Rog Strix Z370 EGAMING Wireless card not working

I do not have enough reputation to comment their, also my post is a bit long. When I ran make I was warned that 

Makefile:976: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"

So I tried this

sudo apt install libelf-dev
make clean
make

which seemed to work

..
..
Install rtlwifi SUCCESS

however the last line gave an error:

sudo modprobe rtl8822be
# modprobe: ERROR: could not insert 'rtl8822be': Exec format error

[edit]

@Jeremy31

$ modinfo rtl8823be | egrep -i 'file|vermagic'
modinfo: ERROR: Module rtl8823be not found.

$ modinfo 8823be | egrep -i 'file|vermagic'
modinfo: ERROR: Module 8823be not found.

$ modinfo rtl8822be | egrep -i 'file|vermagic'
filename:       /lib/modules/4.15.0-33-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8822be/rtl8822be.ko
vermagic:       4.15.0-33-generic SMP mod_unload 

$ modinfo 8822be | egrep -i 'file|vermagic'
modinfo: ERROR: Module 8822be not found.

@chili555

$ lspci -nnk | grep 0280 -A3
04:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b822]
    Subsystem: ASUSTeK Computer Inc. Device [1043:8746]
    Kernel driver in use: r8822be
    Kernel modules: r8822be, rtl8822be

$ lsmod | grep 882
r8822be               851968  0
mac80211              778240  3 rtl_pci,r8822be,rtlwifi
cfg80211              622592  3 mac80211,r8822be,rtlwifi
Sam Murphy
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  • Please edit the question to include results for `modinfo rtl8823be | egrep -i 'file|vermagic'` – Jeremy31 Aug 25 '18 at 11:08
  • Please edit your question to add the result of the terminal command: `lspci -nnk | grep 0280 -A3` Welcome to Ask Ubuntu. – chili555 Aug 25 '18 at 13:16
  • It looks like one command doesn't find rtl8823be and the other command does, seems kinda odd. – Sam Murphy Aug 25 '18 at 18:27
  • What about `modinfo 8823be | egrep -i 'file|vermagic'` – Jeremy31 Aug 25 '18 at 22:14
  • Please show us: `lsmod | grep 882` – chili555 Aug 26 '18 at 01:37
  • Try with 8822be and rtl8822be for modinfo command with grep – Jeremy31 Sep 04 '18 at 11:33
  • @Jeremy31 modinfo rtl8822be returned a filename and vermagic. All this is way beyond me, I am not sure how to interpret these results, please help. – Sam Murphy Sep 05 '18 at 19:32
  • That looks good, what is result for `mokutil --sb-state` Normally the exec format error is the result of the kernel version in the file name not matching the vermagic. It might help if you looked at [this question](https://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work-what-information-is-needed-to-diagnos) and provided results for the wireless script – Jeremy31 Sep 05 '18 at 21:40

1 Answers1

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Open Software & Updates from the start menu. Go to the Additional Drivers tab. There you will find the options to select your Wi-Fi and Graphics drivers. It will look like the image in the following link: https://ibb.co/gWd3yU

You may select the options I've selected. Then press Apply Changes. And hopefully, you are done.

Parvez M Robin
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