apport information ** Tags added: apport-collected cosmic
** Description changed: I'm running Linux 4.20.0-042000-generic #201812232030 x64 on a Dell XPS 9570 with QCA6174 chipset, and have had the problem with Bluetooth audio choppiness ever since I have owned this laptop. This problem has persisted for me with previous kernels. It started with Ubuntu 18.04 and continues with 18.10. I'm running . It's particularly noticeable when the when saturating the WLAN connection with throughput, i.e. copying a large file sequentially across from a samba share, but also streaming video online results in the audio progressively delaying over-time. Re-establishing the Bluetooth audio sync restores the sync, but slowly creeps out again. I've upgraded my linux-firmware package to disco 176 to match v4.20 kernel drivers ref: https://launchpad.net/ubuntu/+source/linux- firmware/1.176 The ath10k_core driver that supports this device has a reference for btcoex: ref https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/wireless/ath/ath10k/core.c?h=v4.20#n2598 It's possible that the Bluetooth component firmware is not supporting or communicating btcoex compatibility, but this is starting to reach the edge of my ability to diagnose the problem. This btcoex support in ath9k has resolved/improved the Bluetooth bandwidth problem as shown in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1746164 - As a troubleshooting step, I've also tried the very latest firmware-6 - file from, but I'm continuing to experience the problem ref: - https://github.com/kvalo/ath10k-firmware/tree/master/QCA6174/hw3.0/4.4.1 + As a troubleshooting step, I've also tried the very latest firmware-6 file from, but I'm continuing to experience the problem ref: https://github.com/kvalo/ath10k-firmware/tree/master/QCA6174/hw3.0/4.4.1 + --- + ProblemType: Bug + ApportVersion: 2.20.10-0ubuntu13.1 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: berg 2871 F.... pulseaudio + CurrentDesktop: GNOME + DistroRelease: Ubuntu 18.10 + InstallationDate: Installed on 2018-07-02 (187 days ago) + InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) + MachineType: Dell Inc. XPS 15 9570 + Package: linux (not installed) + ProcEnviron: + TERM=xterm-256color + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_AU.UTF-8 + SHELL=/bin/bash + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-13-generic root=UUID=c825a7b0-a5ac-41de-bd57-7663fef8a1f1 ro quiet splash vt.handoff=1 + ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17 + RelatedPackageVersions: + linux-restricted-modules-4.18.0-13-generic N/A + linux-backports-modules-4.18.0-13-generic N/A + linux-firmware 1.176 + Tags: cosmic + Uname: Linux 4.18.0-13-generic x86_64 + UpgradeStatus: Upgraded to cosmic on 2018-10-18 (79 days ago) + UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 11/02/2018 + dmi.bios.vendor: Dell Inc. + dmi.bios.version: 1.6.0 + dmi.board.name: 07GHH0 + dmi.board.vendor: Dell Inc. + dmi.board.version: A00 + dmi.chassis.type: 10 + dmi.chassis.vendor: Dell Inc. + dmi.modalias: dmi:bvnDellInc.:bvr1.6.0:bd11/02/2018:svnDellInc.:pnXPS159570:pvr:rvnDellInc.:rn07GHH0:rvrA00:cvnDellInc.:ct10:cvr: + dmi.product.family: XPS + dmi.product.name: XPS 15 9570 + dmi.product.sku: 087C + dmi.sys.vendor: Dell Inc. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1810636/+attachment/5227168/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1810636 Title: QCA6174 doesn't utilise btcoex - Ubuntu 18 Bluetooth Audio Skip/Stutter/Delay WiFi bandwidth conflict Dell XPS 9570 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1810636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
