I'd been trying Linux on and off over the last 5 years ago with a spare Z20t I have and thought I'd put in some recent findings that might help with this issue.
Z20t-B and z20t-C models seem affected the same, with Ubuntu and Arch based installs - also tried various kernels from 5 through to 6.7. An interesting finding with one of my spare Z20's, is that when I wiped and decided to try Windows again, (tested with Win8, 10, and 11), this same situation is reproducable: - Power on, Speakers produce sound - Put to sleep - Wake from sleep, Speakers don't produce sound I found that there's an issue with the latest drivers from Toshiba/Dynabook, even for Windows: 1. Conexant Audio Driver > Posted Date: 2018-05-21 | Version: 8.66.47.56 2. Conexant Audio Driver > Posted Date: 2017-12-19 | Version: 8.66.47.50 | Size: 83.52M The driver from 2018 has the 'sleep-wake speaker not working' issue. But installing the 2017 version works totally fine. Hopefully this may provide some insight on this issue. -- 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/1612916 Title: [Tohsiba Portege Z20T-C] Internal speakers don't work after standby Status in linux package in Ubuntu: Confirmed Status in Arch Linux: New Status in linux package in Debian: New Bug description: On initial boot, sound on internal speakers is working. After standby it doesn work anymore, but a analog headset does. Switching around in pavucontrol doesn't work... Internal microphone works. I'm using Ubuntu 16.04 64 bit on a 4.4.0-34-generic kernel. Toshiba/Dynabook Portege Z20T-C: https://support.dynabook.com/support/modelHome?freeText=1200015981&osId=3333785 WORKAROUND: Use suspend to disk. --- ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: michi 6510 F.... pulseaudio CurrentDesktop: GNOME-Flashback:Unity DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=/dev/mapper/1tb-swap MachineType: TOSHIBA PORTEGE Z20t-C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-34-generic.efi.signed root=/dev/mapper/1tb-miniubuntu ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 RelatedPackageVersions: linux-restricted-modules-4.4.0-34-generic N/A linux-backports-modules-4.4.0-34-generic N/A linux-firmware 1.157.3 Tags: xenial Uname: Linux 4.4.0-34-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirtd lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/27/2016 dmi.bios.vendor: TOSHIBA dmi.bios.version: Version 5.60 dmi.board.asset.tag: 0000000000 dmi.board.name: PORTEGE Z20t-C dmi.board.vendor: TOSHIBA dmi.board.version: Version A0 dmi.chassis.asset.tag: 0000000000 dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: Version 1.0 dmi.modalias: dmi:bvnTOSHIBA:bvrVersion5.60:bd06/27/2016:svnTOSHIBA:pnPORTEGEZ20t-C:pvrPT16BE-00W006GR:rvnTOSHIBA:rnPORTEGEZ20t-C:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0: dmi.product.name: PORTEGE Z20t-C dmi.product.version: PT16BE-00W006GR dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612916/+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
