Fix no bluetooth devices found in Linux Mint

I had a peculiar issue today where I suddenly lost the ability to see any bluetooth devices on my Linux Mint 18.2 desktop utilizing a Plugable USB Bluetooth adapter.

The fix involved checking kernel messages for anything insightful. In my case this is what led me to the solution:

[ 608.988353] Bluetooth: hci0: BCM: Patch brcm/BCM20702A1-0a5c-21e8.hcd not found
[ 609.156320] Bluetooth: hci0: BCM: chip id 63
[ 609.172330] Bluetooth: hci0: LPP-3389-WIN
[ 609.173313] Bluetooth: hci0: BCM20702A1 (001.002.014) build 1764
[ 609.173347] bluetooth hci0: Direct firmware load for brcm/BCM20702A1-0a5c-21e8.hcd failed with error -2

After some googling I finally came across the solution here. The fix is to download the firmware for your bluetooth adapter and place it in the place the bluetooth kernel module expects it to be in, then to reload the bluetooth kernel module.

sudo mkdir -p /lib/firmware/brcm
sudo wget https://s3.amazonaws.com/plugable/bin/fw-0a5c_21e8.hcd -O /lib/firmware/brcm/BCM20702A1-0a5c-21e8.hcd
sudo rmmod btusb bnep bluetooth btrtl btintel bnep btbcm
sudo modprobe btusb bnep bluetooth btrtl btintel bnep btbcm

That did the trick! You can also reboot your machine instead of removing / re-loading the kernel modules and it will accomplish the same thing.

Fix WordPress “Sorry, you are not allowed to access this page.”

I recently came across an issue with my WordPress installation. It’s situated behind a load balancer where SSL is terminated. The load balancer takes HTTPS traffic, then forwards it as HTTP on port 80 to the wordpress server.

I was running issues with a redirect loop after installing wordpress. The solution was to add this bit of code to wp-settings.php:

define('FORCE_SSL_ADMIN', true);
if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
 $_SERVER['HTTPS']='on';

This solves the redirect loop issue but then I ran into a different problem. When I tried to sign into wp-admin I would get this message:

Sorry, you are not allowed to access this page.

After much digging I found this post which emphasizes that you must place that code BEFORE anything else in wp-admin.php. Success!

Fix no sound in Wine

Lately I’ve been doing 100% of my gaming in Linux. The latest versions of wine in Arch Linux have been fantastic (for the most part.) I recently installed a game called Gauntlet (a windows-only steam game.) For some reason I had no sound. Sound worked fine in other Wine games, just not this one.

After much digging I found this post on the Arch Linux forums which fixed my issue. The issue was not having the proper 32bit sound libraries installed. The fix was as simple as:

sudo pacman -Sy lib32-alsa-plugins lib32-libpulse lib32-openal

Success!