I've tried 4.2.0-18.22 kernel by installing linux-image-4.2.0-18-generic_4.2.0-18.22_i386.deb and linux-image-extra-4.2.0-18-generic_4.2.0-18.22_i386.deb (available at https://launchpad.net/~ubuntu-security/+archive/ubuntu/ppa/+build/8272202 ). Using this kernel, regression is disappeared (same as 4.0.0-1 test kernel): there are both hp-wifi and phy0 interfaces in rfkill list output, there are no (back)traces in dmesg | tail output and if I press the wifi switch button, network manager applet shows wifi status properly. Anyway, original bug (as described at the top of this report) exists yet: if I execute the workaround, colors are reversed.
I'll install Ubuntu 15.10 too in order to confirm (or not) if the regression is definitively fixed and I'll update the bug report.
I've tried 4.2.0-18.22 kernel by installing linux-image- 4.2.0-18- generic_ 4.2.0-18. 22_i386. deb and linux-image- extra-4. 2.0-18- generic_ 4.2.0-18. 22_i386. deb (available at https:/ /launchpad. net/~ubuntu- security/ +archive/ ubuntu/ ppa/+build/ 8272202 ). Using this kernel, regression is disappeared (same as 4.0.0-1 test kernel): there are both hp-wifi and phy0 interfaces in rfkill list output, there are no (back)traces in dmesg | tail output and if I press the wifi switch button, network manager applet shows wifi status properly. Anyway, original bug (as described at the top of this report) exists yet: if I execute the workaround, colors are reversed.
I'll install Ubuntu 15.10 too in order to confirm (or not) if the regression is definitively fixed and I'll update the bug report.