Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.14 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1721987 Title: No sound from right audio channel Status in linux package in Ubuntu: Incomplete Bug description: No audio comes out of the right speaker on the laptop. When playing a test video such as https://www.youtube.com/watch?v=hTvJoYnpeRQ the right-channel audio is never heard (i.e., it does not get converted into mono and played through the left speaker). When plugging in headphones, audio is heard from both channels. In Windows, both speakers work, so it is not a physical problem with the speakers. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-12-generic 4.13.0-12.13 [modified: boot/vmlinuz-4.13.0-12-generic] ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 1127 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sat Oct 7 12:58:01 2017 InstallationDate: Installed on 2017-10-07 (0 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926) MachineType: HUAWEI HUAWEI MateBook X ProcEnviron: PATH=(custom, no username) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-12-generic.efi.signed root=UUID=f0a69f35-7c1e-4280-b325-6b7fec6e174a ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-12-generic N/A linux-backports-modules-4.13.0-12-generic N/A linux-firmware 1.168 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/14/2017 dmi.bios.vendor: HUAWEI dmi.bios.version: 1.12 dmi.board.name: HUAWEI MateBook X dmi.board.vendor: HUAWEI dmi.board.version: 2.0 dmi.chassis.type: 10 dmi.chassis.vendor: HUAWEI dmi.modalias: dmi:bvnHUAWEI:bvr1.12:bd08/14/2017:svnHUAWEI:pnHUAWEIMateBookX:pvr2.0:rvnHUAWEI:rnHUAWEIMateBookX:rvr2.0:cvnHUAWEI:ct10:cvr: dmi.product.family: HUAWEI MateBook dmi.product.name: HUAWEI MateBook X dmi.product.version: 2.0 dmi.sys.vendor: HUAWEI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1721987/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
