Description of problem: No sound after upgrading to kernel-4.4.2-301.fc23.x86_64 How reproducible: Always. Steps to Reproduce: 1. upgrade to kernel-4.4.2-301 from kernel-4.3.5-300 2. cold start twice 3. test speakers via gnome control panel Actual results: No sound. Expected results: Sound. Additional info: Downgrading to kernel-4.3.5-300 and doing cold start twice restores sound. machine: Dell XPS 13 (early 2015) with A07 BIOS lspci: 00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) 00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09) 00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (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) 00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI Controller (rev 03) 00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03) 00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03) 00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03) 00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03) 01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5249 PCI Express Card Reader (rev 01) 02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 48)
Related to Bug 1313434 https://bugzilla.redhat.com/show_bug.cgi?id=1313434
This might also be related to previous issues with sound on Dell XPS 13, due to problems with I2S mode and/or HDA mode. https://bugzilla.redhat.com/show_bug.cgi?id=1216185 https://bugzilla.redhat.com/show_bug.cgi?id=1255070 Why does this keep on happening ?
*** This bug has been marked as a duplicate of bug 1313434 ***