After I upgrade Kubuntu from 17.10 to 18.04, and restarted it, all I'm seeing is my mouse cursor, which responds to my movements, and that's pretty much it. I tried to see if I can start up sddm, but that failed.
After running journalctl -xe, this is the entry when it tried to start up systemd-modules-load.service:
systemd-modules-load[1858]: Failed to find module 'ashmem_linux'
systemd-modules-load[1858]: Failed to find module 'binder_linux'
systemd[1]: systemd-modules-load.service: Main process exited, code=exited, status=1/FAILURE
systemd[1]: systemd-modules-load.service: Failed with result 'exit-code'
systemd[1]: Failed to start Load Kernel Modules
I also checked /etc/modules, but they're empty.
I tried disabling Secure Boot from Lenovo's BIOS, but it won't let me (the option is disabled).
I tried running sudo dpkg --configure -a, but that didn't work, and neither did sudo apt install -f.
The solution I tried: https://askubuntu.com/a/779574/558318
I tried mokutil --disable-validation, but that didn't work at all, either.
dmesg | grep -i failed returns this:
[ 0.261240] pci 0000:03:00:00.0: BAR 6: failed to assign [mem size 0x00080000 pref]
[ 1.303500] rtc_cmos: probe of 00:01 failed with error -16
[ 1.523312] ACPI Error: Method parse/execution in failed \_SB.PCI0.RP05.PEGP.DD02._BCL, AE_NOT_FOUND (20170831/psparse-550)
[ 5.313157] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 5.313161] cfg80211: failed to load regulatory.db
[ 6.663134] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
This original problem got solved by purging anbox, but it seems that that wasn't the problem at all. See here
