1. Please describe the problem: ThinkBook 16p has very low volume on Fedora 39 with kernel 6.6.9-200.fc39.x86_64 (64-bit). Probably related to the amplifier cs35l41. ``dmesg | grep CSC`` shows: ```[ 6.163429] Serial bus multi instantiate pseudo device driver CSC3551:00: Instantiated 2 I2C devices. [ 6.338232] cs35l41-hda i2c-CSC3551:00-cs35l41-hda.0: Failed property cirrus,dev-index: -22 [ 6.338238] cs35l41-hda i2c-CSC3551:00-cs35l41-hda.0: error -EINVAL: Platform not supported [ 6.338268] cs35l41-hda: probe of i2c-CSC3551:00-cs35l41-hda.0 failed with error -22 [ 6.339753] cs35l41-hda i2c-CSC3551:00-cs35l41-hda.1: Failed property cirrus,dev-index: -22 [ 6.339760] cs35l41-hda i2c-CSC3551:00-cs35l41-hda.1: error -EINVAL: Platform not supported [ 6.339795] cs35l41-hda: probe of i2c-CSC3551:00-cs35l41-hda.1 failed with error -22 ``` My alsa-info: http://alsa-project.org/db/?f=c05588dd078fc7d26339d6a2228cfa30450fa5fe I'm not familiar with kernel debugging, but I'm very glad to follow up providing more info and test patches :) 2. What is the Version-Release number of the kernel: 6.6.9-200.fc39.x86_64 (64-bit) 3. Did it work previously in Fedora? If so, what kernel version did the issue *first* appear? Old kernels are available for download at https://koji.fedoraproject.org/koji/packageinfo?packageID=8 : Tried 6.6.0 and 6.6.8, both have the same issue. 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: 1. Fresh-install fedora on ThinkBook 16p Gen4 IRH 2. Boot with the default kernel 3. Only the high-frequency speakers are working and the rest 4 speakers not working, which makes the sound volume very low. 5. Does this problem occur with the latest Rawhide kernel? To install the Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by ``sudo dnf update --enablerepo=rawhide kernel``: Unfortunately I counldn't boot properly with rawhide kernel (stuck at splash screen) 6. Are you running any modules that not shipped with directly Fedora's kernel?: No 7. Please attach the kernel logs. You can get the complete kernel log for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the issue occurred on a previous boot, use the journalctl ``-b`` flag. https://gist.github.com/wenqihuang/d6b0058feaecde934cca536fc2caabb1#file-gistfile1-txt Reproducible: Always
I've found some workaround here: https://gist.github.com/levihuayuzhang/6137ae4ae46301a355fd37c63e0d876a?permalink_comment_id=4825952#gistcomment-4825952 Just add a few lines in cs35l41_hda_property.c and patch_realtek.c. But the volume control is not working any more and the sound quality is still not as good as it on Windows.
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