[Bug 2149808] Re: Qualcomm X1E: Speaker overdrive causes hardware protection shutdown

** Description changed: + [ 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. ** Also affects: linux (Ubuntu Resolute) Importance: Undecided Status: New -- 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: New 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2149808/+subscriptions