Having said that, this sounds like very specific hardware with a very
specific problem. So in this case I'm happy to reopen this bug.
** Tags added: bionic
** Changed in: alsa-driver (Ubuntu)
Status: Invalid => Confirmed
** Changed in: pulseaudio (Ubuntu)
Status: Invalid => Confirmed
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https://bugs.launchpad.net/bugs/1672822
Title:
sound only coming from left speaker on acer predator (fresh install)
Status in alsa-driver package in Ubuntu:
Confirmed
Status in pulseaudio package in Ubuntu:
Confirmed
Bug description:
Ubuntu version: Ubuntu 16.10 and a fresh install of 17.04 and even
fedora F25-WORK-x86_64-20170228 via live usb
Device: acer predator: G9-593-7757 15,6"/i7-7700/32 GB RAM/512 GB
SSD/1 TB HDD/GTX1070
expected: sound comes out of both left and right speaker and the
subwoofer
what happened instead:
Sound only comes out of the left speaker or subwoofer.
More system information:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC255 Analog [ALC255 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
audio chip (on motherboard): VGA Chip nVidia N17E-G2-A1 GP104-725-A1
note that that is only 1 device, one would expect several here.
I attempted to fix this by modifying the /etc/pulse/deamon.conf into the
following:
# This file is part of PulseAudio.
#
# PulseAudio is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PulseAudio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
## Configuration file for the PulseAudio daemon. See pulse-daemon.conf(5) for
## more information. Default values are commented out. Use either ; or # for
## commenting.
; daemonize = no
; fail = yes
; allow-module-loading = yes
; allow-exit = yes
; use-pid-file = yes
; system-instance = no
; local-server-type = user
; enable-shm = yes
; enable-memfd = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64
MiB
; lock-memory = no
; cpu-limit = no
; high-priority = yes
; nice-level = -11
; realtime-scheduling = yes
; realtime-priority = 5
; exit-idle-time = 20
; scache-idle-time = 20
; dl-search-path = (depends on architecture)
; load-default-script-file = yes
; default-script-file = /etc/pulse/default.pa
; log-target = auto
; log-level = notice
; log-meta = no
; log-time = no
; log-backtrace = 0
; resample-method = speex-float-1
; enable-remixing = yes
enable-lfe-remixing = yes
; lfe-crossover-freq = 0
flat-volumes = no
; rlimit-fsize = -1
; rlimit-data = -1
; rlimit-stack = -1
; rlimit-core = -1
; rlimit-as = -1
; rlimit-rss = -1
; rlimit-nproc = -1
; rlimit-nofile = 256
; rlimit-memlock = -1
; rlimit-locks = -1
; rlimit-sigpending = -1
; rlimit-msgqueue = -1
; rlimit-nice = 31
; rlimit-rtprio = 9
; rlimit-rttime = 200000
; default-sample-format = s16le
; default-sample-rate = 44100
; alternate-sample-rate = 48000
default-sample-channels = 3
default-channel-map = front-left,front-right,lfe
; default-fragments = 4
; default-fragment-size-msec = 25
; enable-deferred-volume = yes
deferred-volume-safety-margin-usec = 1
; deferred-volume-extra-delay-usec = 0
but this did not work. I also tried various other permutations to see
if changing the order of front-left,front-right,lfe would work but it
did not. I also tried to see if it would work in fedora but the same
problem occurred there. When on ubuntu 16.10 at first only the
subwoofer seemed to be working and altering the file only the left
speaker was working. On ubuntu 17.04 only the left speaker was working
regardless of how I altered the above file.
Note that the speakers work perfectly fine on windows 10.
Looking around online there seem to be a lot of problems with acer
predator laptops and sound on ubuntu.
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