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I have a USB Bluetooth adapter (0a12:0001) that has some problems under Trusty. It works about 50% of the time, and if I unplug it and reconnect it, then it works again.

I know this is a known issue. I've read the bug reports. I also know that this is fixed in 14.10 Utopic Unicorn (fixed in kernel 3.14+, Trusty has 3.13), but I can't update to Utopic because Utopic is not an LTS release, and I need an LTS release for what I'm using my computer for.

I don't want to compile and install a newer version of the kernel, as I have failed before and had to reinstall. What I am asking is, how can I fix this without having to compile and install a newer version of Linux or updating to Utopic? (I'm okay with updating my kernel with apt or something, as long as there is little to no chance of me messing up).

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  • The Utopic Kernel will be available as an HWE-Kernel for 14.04 LTS, a few weeks after Utopic has been released. – LiveWireBT Oct 7 '14 at 4:44
  • For those reading this, the HWE kernel is now available and can be installed with the command 'sudo apt-get install linux-hwe-generic-trusty'. This will also install the headers. – John Scott Feb 1 '15 at 3:40
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Ubuntu 14.04 (current patches up to 1/15/2015) Lenovo ThinkPad W530.

I found the Cirago BTA8000 at Fry's Electronics for $19.99. It was literally "plug and play".

I tried several different brands and kept returning them because they couldn't be made to work.

When I plugged in the BTA8000, I thought it was another failure - no dings, no horns, nothing to indicate a success. But, the BTA8000 was blinking every 1 or 2 seconds. Then I noticed the bluetooth icon on the upper right screen boarder.

I used one of the W530's USB 2.0 ports and it come right up. No drivers to load, no services to start, no fiddling and no issues.

I have now paired my Apple keyboard and the Logitech bluetooth mouse. Each went painlessly and exactly as I would hope.

Cirago Bluetooth 4.0 Mini USB Adapter EDR / Low Energy Backwards compatible 1.1/1.2/2.0/3.0 www.cirago.com.

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  • I had to sudo apt-get install --install-recommends linux-generic-lts-trusty and reboot in order for this to work – Isaac Betesh Jan 25 '16 at 14:40

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