[Bug 2149808] Update Released

The verification of the Stable Release Update for linux has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions. -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2149808 Title: Qualcomm X1E: Speaker overdrive causes hardware protection shutdown Status in linux package in Ubuntu: New Status in linux source package in Resolute: Fix Released Bug description: [ Impact ] On Qualcomm X1 SoCs the Linux upstream audio support is currently lacking active speaker protection support in the DSP or software. Since 26.04. all the upstream changes have landed to enable audio/speakers by default on some devices using this SoC (Thinkpad T14s). Unfortunately the current default does not seem to be safe to use. Playing music and turning the speaker up to 100% causes a hardware safety mechanism to trigger and shut down the speakers entirely until the next reboot. Such a safety mechanism is not guaranteed and on some devices the impact might even be worse. The previous SoC generation fixed this by limiting the volume in the Linux kernel driver, see https://github.com/torvalds/linux/commit/c481016bb4f8a9c059c39ac06e7b65e233a61f6a I believe the same should be done for the X1 family. A patch to do that is available on the linux-arm-msm mailing list https://patchwork.kernel.org/project/linux-arm- msm/patch/20260421-x1e80100-audio- limit-v1-1-98bac8cee2ee@canonical.com/ [ Test Plan ] The bug is trivial to reproduce (buy I don't recommend trying if you value your hardware) by playing audio and slowly increasing the system volume until the speakers stop working. With the fix applied, it should be possible to go to 100% volume without breaking the speakers. [ Where problems could occur ] This only affects machines based on this specific soc, of which only few have firmware and alsa config upstream to work out of the box. On those devices there is a small risk that our patch could break something in the audio driver but the impact would be low and broken audio is not a major regression since this is the first release where it would work out the box. [ Other Info ] For better test coverage I have also shipped a kernel with this fix included in our ubuntu-concept ppa at https://launchpad.net/~ubuntu- concept/+archive/ubuntu/x1e To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2149808/+subscriptions