after installing this update and rebooting, I noticed that my audio device was not able to play sound anymore. After I looked into the KDE System Settings, I found that all audio devices were greyed out, and only a "Dummy Output" was available and active. I can manually enable the HDMI output (though I don't have HDMI but rather a DisplayPort), but I cannot enable the speaker and headphone output (broadwell-rt286 Speaker Playback + Headphones Playback).
I really don't know what to post, here is an excerpt from lspci:
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Processor Thermal Subsystem (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
My notebook is the Dell XPS 13 from two years ago, sadly having a Broadcom WLAN, Bluetooth and audio chip. Driver support for these hasn't been very great to begin with, but it has gotten better. I hope this issue is easily resolvable.
If I should post more logs just tell me which, I don't really have any experience debugging driver issues (as this usually just works with Linux).