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You update your kernel often? I remember the retpoline thing being an issue a year ago. And you can't post results for modinfo 8812au from an older kernel since you did a dkms remove on it. I might have to boot up the old laptop with Mint 18 to see what I can find there

I tried 4.4.0-143 and it has even more issues. I would try what I suggested and see if the modinfo after reinstalling 142 shows retpoline

What might fix this is to reboot into an older working kernel, go into Update Manager view/linux kernels and remove 4.4.0-142, install any updates in update manager, somehow you must have installed that kernel before you got the gcc update that support retpoline You can see the vermagic for kernel m...

Lets see

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sudo apt update; apt policy build-essential

Post result for

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modinfo cfg80211; lsmod | grep cfg; mokutil --sb-state

Strange, what about

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dmesg | grep 8812; modinfo 8812au

I think gcc and g++ are part of package build-essential, try

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sudo apt update && sudo apt install build-essential

You might also have to do

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sudo apt-get install -f

Is windows still installed? I would like to see the hardware ID for the bluetooth from device manager properties page

My headset reconnects in Ubuntu 18.04 but I may have tweaked some settings in /etc/bluetooth
I haven't tried anything with bluetooth on my Mint 19 laptop

Try deleting the pairing and see if it works after pairing again

You have no Bluetooth controller connected. The wifi card doesn't have one and nothing listed in lsusb results that I know of is bluetooth

Post result for

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cat /etc/default/grub

Actually just edit grub, scroll to the end of the file, see if that vm.swapiness line is there

try

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pactl load-module module-bluetooth-discover

Then pair with the headphones

I would think you could edit /etc/default/grub and remove quiet splash from the line

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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

, then do

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sudo update-grub

What is the result for

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pactl list short | grep blue

What about

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ls /sys/class/leds/

I would suspect the wifi to work in Ubuntu 18.04.2 or Ubuntu 18.10 from the Live ISO as they use a newer kernel than Mint 19 or Ubuntu 18.04

I don't think Mint works with those RAID setups. I would back up everything before making any changes as I don't know if Windows will boot if you switch to AHCI

I would check that and also see if BIOS is using AHCI or RAID?

Windows 10 on the laptop? Is the hybrid shutdown disabled in Windows? Post results from terminal in live for

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sudo parted -l

Press i if it asks a question about partition size or whatever

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Re: can't get ALFA AWUS036H adapter to work ('8812au': Exec format error")

Re: can't get ALFA AWUS036H adapter to work ('8812au': Exec format error")

Re: can't get ALFA AWUS036H adapter to work ('8812au': Exec format error")

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