Last few months, since I bought Lenovo Legion Pro 7 16ARX8H, I’m struggling to get sound on internal speakers. Headphones works, bluetooth works, but internal speakers don’t. After trying countless solutions, I finally found the one which works for me, disabling power saving features:
https://forums.lenovo.com/t5/Ubuntu/Ubuntu-and-legion-pro-7-16IRX8H-audio-issues/m-p/5210709?page=32
Create a script /usr/local/bin/tas2781-fix with the following contents:
#!/bin/sh
if [ "$(id -u)" -ne 0 ]; then
printf "You must run this script as root.\n"
exit 1
fi
POWER_SAVE_PATH="/sys/module/snd_hda_intel/parameters/power_save"
POWER_CONTROL_PATH="/sys/bus/i2c/drivers/tas2781-hda/i2c-TIAS2781:00/power/control"
check_paths() {
[ -e "$POWER_SAVE_PATH" ] && [ -e "$POWER_CONTROL_PATH" ]
}
while ! check_paths; do
sleep 1
done
# Disable snd_hda_intel power saving
printf "0" > "$POWER_SAVE_PATH"
# Disable runtime suspend/resume for tas2781
printf "on" > "$POWER_CONTROL_PATH"
Make script executable:
chmod +x /usr/local/bin/tas2781-fix
Now make a systemd unit /etc/systemd/system/tas2781-fix.service:
[Unit]
Description=Run the tas2781-fix script after the relevant sysfs paths become available
[Service]
Type=oneshot
ExecStart=/usr/local/bin/tas2781-fix
RemainAfterExit=true
TimeoutSec=60
[Install]
WantedBy=multi-user.target
Enable the unit and restart by executing
systemctl daemon-reload
systemctl enable tas2781-fix.service
Reboot.
