Bluetooth regression, speedy backport request

[Connor Kuehl]

On 10/23/19 12:05 PM, Juraj Oršulić wrote:
> Dear kernel team, I would like to report breakage of BLE bluetooth 
> connectivity on Ubuntu 16.04 and latest stable kernel 4.4.0-166, also 
> seen on newer hwe kernels.
> 
> I have performed regression testing and found out that 4.4.0-164 works. 
> With mainline kernels, past working kernel is 4.4.186, 187-194 are 
> broken, while the following fix was applied in mainline 4.4.195 which 
> restores functionality:
> https://github.com/torvalds/linux/commit/4f1af2bcab137526c66ea92d3026e3f2879281e2/

Hi Juraj,

This fix is included in the Xenial 16.04 kernel that is currently in 
-proposed. If you have a machine you're able to test with, you can 
enable the -proposed repository[1] and install that kernel. If you test 
the kernel in -proposed and find that it doesn't fix the regression 
you're experiencing, then please file a launchpad bug (either by 
visiting the Linux package on bugs.launchpad.net or with `ubuntu-bug 
linux`).

Otherwise, barring any unusual circumstances, the kernel containing this 
fix should release on 11 November[2].

Here is the Launchpad bug that describes the fix's inclusion into the 
Xenial kernel: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848589

Thank you!

Connor

[1] https://wiki.ubuntu.com/Testing/EnableProposed
[2] https://kernel.ubuntu.com/

> 
> 
> I would like to ask you to speed releasing this fix to the stable 
> kernels, as our BLE peripherals are now broken. Thank you.
> 
> Best regards, Juraj
> 
>