Hi Folks. I've found another issue with the Realtek ALC295 codec in Linux and I have a fix for this too (see #17 in this thread for my initial fix).
When I boot into Windows first and then into Linux, there are two problems: 1. The internal speakers don't work (headphones are okay). 2. The internal microphone doesn't respond. To fix the problem, I can do the following: Install alsa-tools if not installed: sudo apt install alsa-tools Create and save a script in /usr/local/bin: #!/bin/bash # Fix for no sound from internal speakers when rebooting from Windows hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x10 hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0120 hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0d hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0xa023 # Fix for no mic and headphone jack switching when rebooting from Windows hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x45 hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x5289 hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x46 hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0004 Run the script as root in a terminal to immediately fix the problem. To run the script on startup, use cron with the @reboot command: sudo crontab -e and then add line in crontab: @reboot [full path to script] (note that I put this cron entry before my initial fix, but I don't think it matters). Please note that the script doesn't need to be copied or linked to /lib/systemd/system-sleep as the fix persists after a suspend/wake. For more technical details regarding this fix, see https://bugzilla.kernel.org/show_bug.cgi?id=195457 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1648183 Title: Crackling and popping sound when using headphones Status in alsa-driver package in Ubuntu: New Status in alsa-driver package in Arch Linux: New Status in Fedora: New Bug description: Laptop is HP Pavilion - 15-au118tx. The laptop has B and O play and the output from speakers are just fine, when using headphones there is some kind of crackling and popping sound in both ears but prominently in the left ear. The issue happens only when the sound is played, if i reduce the PCM way low using alsamixer, the effect is minimized but the volume is also reduced. Increasing the volume in the panel increases the PCM as well. ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.8.0-30.32-generic 4.8.6 Uname: Linux 4.8.0-30-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.3-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: antony 1719 F.... pulseaudio CurrentDesktop: Unity Date: Wed Dec 7 23:30:05 2016 InstallationDate: Installed on 2016-11-20 (17 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Black Headphone Out, Left Symptom_Type: Digital clip or distortion, or "overdriven" sound Title: [HP Pavilion Notebook, Realtek ALC295, Black Headphone Out, Left] Sound is distorted UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/19/2016 dmi.bios.vendor: Insyde dmi.bios.version: F.14 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 8216 dmi.board.vendor: HP dmi.board.version: 83.13 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.14:bd07/19/2016:svnHP:pnHPPavilionNotebook:pvrType1ProductConfigId:rvnHP:rn8216:rvr83.13:cvnHP:ct10:cvrChassisVersion: dmi.product.name: HP Pavilion Notebook dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP mtime.conffile..etc.modprobe.d.alsa-base.conf: 2016-12-07T23:12:52.939689 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1648183/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
