Installed 18.04 LTS with kernel 4.15 - was required to disabled secure
boot mode to get the r8822be wifi module working. Seems unsigned here as
well.

lappy5k:~$ sudo uname -a
Linux lappy5k 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux

---- modinfo, no signature ----
@lappy5k:~$ sudo modinfo r8822be
filename:       
/lib/modules/4.15.0-43-generic/kernel/drivers/staging/rtlwifi/r8822be.ko
description:    Realtek 802.11n PCI wireless core
license:        GPL
author:         Larry Finger    <larry.fin...@lwfinger.net>
author:         Realtek WlanFAE <wlan...@realtek.com>
author:         lizhaoming      <chaoming...@realsil.com.cn>
description:    PCI basic driver for rtlwifi
license:        GPL
author:         Larry Finger    <larry.fin...@lwfinger.net>
author:         Realtek WlanFAE <wlan...@realtek.com>
author:         lizhaoming      <chaoming...@realsil.com.cn>
firmware:       rtlwifi/rtl8822befw.bin
description:    Realtek 8822BE 802.11n PCI wireless
license:        GPL
author:         Larry Finger    <larry.fin...@lwfinger.net>
author:         Realtek WlanFAE <wlan...@realtek.com>
description:    Realtek 802.11n PCI wireless core
license:        GPL
author:         Larry Finger    <larry.fin...@lwfinger.net>
author:         Realtek WlanFAE <wlan...@realtek.com>
description:    Realtek 802.11n PCI wireless core
license:        GPL
author:         Larry Finger    <larry.fin...@lwfinger.net>
author:         Realtek WlanFAE <wlan...@realtek.com>
srcversion:     9AE3E31830D5363CA6C8264
alias:          pci:v000010ECd0000B822sv*sd*bc*sc*i*
depends:        mac80211,cfg80211
staging:        Y
retpoline:      Y
intree:         Y
name:           r8822be
vermagic:       4.15.0-43-generic SMP mod_unload
parm:           debug_level:int
parm:           swenc:Set to 1 for software crypto (default 0)
 (bool)
parm:           ips:Set to 0 to not use link power save (default 1)
 (bool)
parm:           swlps:Set to 1 to use SW control power save (default 0)
 (bool)
parm:           fwlps:Set to 1 to use FW control power save (default 1)
 (bool)
parm:           msi:Set to 1 to use MSI interrupts mode (default 1)
 (bool)
parm:           dma64:Set to 1 to use DMA 64 (default 0)
 (bool)
parm:           aspm:Set to 1 to enable ASPM (default 1)
 (int)
parm:           debug:Set debug level (0-5) (default 0)
parm:           debug_mask:Set debug mask (default 0) (ullong)
parm:           disable_watchdog:Set to 1 to disable the watchdog (default 0)
 (bool)
$

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https://bugs.launchpad.net/bugs/1806472

Title:
  RTL8822BE WiFi Disabled in Kernel 4.18.0-12

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