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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1648183 Title: Crackling and popping sound when using headphones To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1648183/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
