Public bug reported: Title: Dell XPS 13 DX13260 (0E53): poor internal speaker sound; CS35L56 amps missing from sound card
The internal speakers sound very poor. Audio is audible, so this is not a complete "no sound" issue. Hardware and software: - Dell XPS 13 DX13260, SKU 0E53; audio PCI subsystem 1028:0e53 - BIOS 1.3.0 - Ubuntu 26.04.1 LTS, kernel 7.0.0-1015-oem - linux-firmware 20260319.git217ca6e4.1ubuntu - firmware-sof-signed 2025.12.2-1 - alsa-ucm-conf 1.2.15.3-1ubuntu1.7 Steps to reproduce: 1. Select the internal Speaker output in Sound settings. 2. Play music or speech at a moderate volume. 3. Observe poor sound quality. Expected: normal sound quality from the laptop's full speaker system. Actual: poor sound quality despite audible stereo playback. Read-only diagnostic findings: - Both left and right CS35L56 SPI amplifiers bind to their drivers. - snd_soc_cs35l56_spi has a usecount of 0. - ALSA exposes no AMPL/AMPR amplifier controls. - The sound card components list only spk:cs42l43-spk. - Boot logs report no matching SoundWire machine driver and fall back to function topologies, including sof-sdca-1amp-id2.tplg. - No files matching 10280e53 were found in /usr/lib/firmware/cirrus. - Kernel sidecar-add/count implementation symbols are present. - The CirrusSmartAmpCalibrationData EFI variable is present; its contents were not read. - Internal stereo HiFi output selected; hardware gains balanced; no PipeWire filter nodes or user audio overrides found. These findings suggest the sidecar amplifiers are not integrated into the playback path. This is a working diagnosis, not a confirmed acoustic A/B result. No workaround, custom firmware, kernel option, or BIOS change has been applied. An exact-model owner reports the same amplifier symptoms: https://github.com/omacom/omarchy/discussions/8621 Possibly related Ubuntu report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2159594 That report concerns silence/PLL faults rather than poor sound. Please investigate missing amplifier integration and model-specific firmware, and whether fixes can be provided through supported Ubuntu updates. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-1015-oem 7.0.0-1015.15 ProcVersionSignature: Ubuntu 7.0.0-1015.15-oem 7.0.14 Uname: Linux 7.0.0-1015-oem x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 SourcePackage: linux-signed-oem-7.0 Title: Dell XPS 13 DX13260 (0E53): poor internal speaker sound; CS35L56 amps missing from sound card ** Affects: linux-signed-oem-7.0 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169867 Title: Dell XPS 13 DX13260 (0E53): poor internal speaker sound; CS35L56 amps missing from sound card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-oem-7.0/+bug/2169867/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
